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INSTRUCTION MANUAL

VHF/UHF

ALL MODE TRANSCEIVER

i910H

IMPORTANT

READ THIS INSTRUCTION MANUAL

CAREFULLY before attempting to operate the

transceiver.

SAVE THIS INSTRUCTION MANUAL. This

manual contains important safety and operating in-

structions for the IC-910H.

EXPLICIT DEFINITIONS

R WARNING HIGH VOLTAGE! NEVER at-

tach an antenna or internal antenna connector during

transmission. This may result in an electrical shock or

burn.

R NEVER apply AC to the [DC13.8V] jack on the

transceiver rear panel. This could cause a ﬁre or ruin

the transceiver.

R NEVER apply more than 16 V DC, such as a 24 V

battery, to the [DC13.8V] jack on the transceiver rear

panel. This could cause a ﬁre or ruin the transceiver.

R NEVER let metal, wire or other objects touch any

internal part or connectors on the rear panel of the

transceiver. This may result in an electric shock.

R NEVER expose the transceiver to rain, snow or

any liquids.

AVOID using or placing the transceiver in areas with

temperatures below –10°C (+14°F) or above +60°C

(+140°F). Be aware that temperatures on a vehicle’s

dashboard can exceed 80°C (+176°F), resulting in per-

manent damage to the transceiver if left there for ex-

tended periods.

AVOID placing the transceiver in excessively dusty en-

vironments or in direct sunlight.

AVOID placing the transceiver against walls or putting

anything on top of the transceiver. This will obstruct

heat dissipation.

Place unit in a secure place to avoid inadvertent use

by children.

During mobile operation, DO NOT operate the trans-

ceiver without running the vehicle’s engine. When the

transceiver power is ON and your vehicle’s engine is

OFF, the vehicle’s battery will soon become ex-

hausted.

Make sure the transceiver power is OFF before start-

ing the vehicle. This will avoid possible damage to the

transceiver by ignition voltage spikes.

During maritime mobile operation, keep the transceiver

and microphone as far away as possible from the mag-

netic navigation compass to prevent erroneous indica-

tions.

BE CAREFUL! The heatsink will become hot when

operating the transceiver continuously for long periods.

BE CAREFUL! If a linear amplifier is connected, set

the transceiver’s RF output power to less than the lin-

ear ampliﬁer’s maximum input level, otherwise, the lin-

ear ampliﬁer will be damaged.

Use Icom microphones only (supplied or optional).

Other manufacturer’s microphones have different pin

assignments, and connection to the IC-910H may

damage the transceiver.

PRECAUTIONS

WORD

WARNING

CAUTION

NOTE

DEFINITION

Personal injury, fire hazard or electric

shock may occur.

If disregarded, inconvenience only.

No risk of personal injury, fire or

electric shock.

Equipment damage may occur.

SUPPLIED ACCESSORIES

The transceiver comes with the following accessories.

Qty.

q DC power cable (OPC-657A) ............................ 1

w Hand microphone (HM-36) ................................ 1

e Spare fuses (FGB 30 A) .................................... 2

r Spare fuse (FGB 4 A) ........................................ 1

TABLE OF CONTENTS

qwe

IMPORTANT ........................................ i

EXPLICIT DEFINITIONS ..................... i

PRECAUTIONS ................................... i

1 TABLE OF CONTENTS ................ 1

2 PANEL DESCRIPTION ........... 2– 13

■ Front panel ..................................... 2

■ Function display ........................... 10

■ Rear panel .................................... 12

3 INSTALLATION AND

CONNECTIONS ................... 14– 17

■ Unpacking .................................... 14

■ Grounding ..................................... 14

■ Selecting a location ...................... 14

■ Antenna connection ...................... 14

■ Required connections ................... 15

■ Advanced connections ................. 16

■ Power supply connections ............ 17

4 BASIC OPERATION ............. 18 – 25

■ Initial settings ................................ 18

■ When ﬁrst applying power

(CPU resetting) ............................. 18

■ MAIN and SUB bands .................. 19

■ Operating band selection ............. 20

■ VFO description ............................ 21

■ Frequency setting ......................... 22

■ SUB band OFF ............................. 24

■ SUB tuning dial ............................. 24

■ Dial lock function .......................... 25

5 RECEIVE AND TRANSMIT .. 26 –39

■ Functions for receive .................... 26

■ RIT function .................................. 27

■ IF shift function ............................. 27

■ AGC time constant ....................... 28

■ AFC function ................................. 28

■ FM center indicator ....................... 28

■ Attenuator ..................................... 29

■ Simple band scope ....................... 29

■ Noise blanker ............................... 30

■ Tone squelch operation ................ 30

■ Optional DSP functions ................ 31

■ Functions for transmit ................... 32

■ Transmit via microphone .............. 32

■ Indications during transmit ........... 32

■ FM mode operation ...................... 33

■ VOX operation .............................. 33

■ Repeater operation ....................... 34

■ SSB mode operation .................... 36

■ Speech compressor ..................... 36

■ Split frequency operation .............. 37

■ Full duplex operation .................... 37

■ Connections for CW ..................... 38

■ CW mode operation ..................... 38

6 MEMORY OPERATION ........ 40– 44

■ Memory channels ......................... 40

■ Operation on a memory channel .. 40

■ Programming in VFO mode .......... 41

■ Programming in memory mode .... 41

■ Blank channels ............................. 42

■ Frequency transferring ................. 42

■ Memory clearing ........................... 43

■ Call channels ................................ 43

■ Memo pads ................................... 44

7 SCANS ................................. 45– 47

■ Scan types .................................... 45

■ Preparation ................................... 45

■ Programmed scan operation ........ 46

■ Memory scan operation ................ 46

■ Memory select scan ..................... 47

■ Tone scan ..................................... 47

8 SATELLITE OPERATION ..... 48 –51

■ Satellite communications outline .. 48

■ Satellite notes ............................... 48

■ Entering into the satellite mode .... 48

■ Setting the satellite VFO ............... 49

■ Tracking selection ......................... 49

■ Preparation ................................... 50

■ Satellite operation ......................... 51

■ Satellite memory ........................... 51

9 DATA COMMUNICATION ..... 52– 54

■ Functions for AFSK ...................... 52

■ Connections for AFSK .................. 52

■ Operating mode notes .................. 53

■ Operating frequency notes ........... 53

■ AFSK operation ............................ 53

■ Setting the ACC socket ................ 54

10 SET MODE ........................... 55– 69

■ Set mode description .................... 55

■ General set mode ......................... 56

■ FM set mode ................................ 60

■ SSB/CW set mode ....................... 62

■ Scan set mode ............................. 64

■ Memo pad set mode ..................... 64

■ Compressor set mode .................. 64

■ VOX set mode .............................. 65

■ Attenuator set mode ..................... 65

■ Transmit set mode ........................ 66

■ NR set mode ................................ 67

■ SWP set mode ............................. 67

■ RIT/SHIFT set mode .................... 68

■ Speech set mode ......................... 69

11 OPTION INSTALLATIONS ... 70– 76

■ Internal view ................................. 70

■ Opening the transceiver’s case .... 71

■ UT-102

VOICE SYNTHESIZER

UNIT

.............................................. 71

■ UT-106 DSP UNIT .......................... 72

■ UX-910 1200 MHz BAND UNIT

........ 73

■ CR-293

HIGH STABILITY CRYSTAL

UNIT

.............................................. 74

■ FL-132/FL-133

CW NARROW

FILTER

........................................... 75

12 MAINTENANCE ................... 76– 77

■ Troubleshooting ............................ 76

■ Fuse replacement ......................... 77

■ CPU resetting ............................... 77

13 CONTROL COMMAND ........ 78 – 79

■ Remote jack (CI-V) information .... 78

14 SPECIFICATIONS ....................... 80

15 OPTIONS ..................................... 81

16 INSTALLATION NOTES ....... 82– 83

■ Front panel

q POWER SWITCH [POWER]

➥ Push momentarily to turn power ON.

➥ Push for 2 sec. to turn power OFF.

w TRANSMIT SWITCH [TRANSMIT]

Push to select transmitting or receiving.

e COMPRESSION SWITCH [COMP] (p. 36)

Push to switch the speech compressor function ON

and OFF.

• The speech compressor increases average RF output

power, improving signal strength and readability in SSB.

r VOX SWITCH [VOX] (p. 33)

Push to switch the VOX function ON and OFF.

• The VOX (Voice-Operated Transmission) function tog-

gles between transmit and receive with your voice. This

function provides an opportunity to input log entries into

your computer, etc., while operating.

t HEADPHONE JACK [PHONES]

Accepts headphones.

• Output power: 5 mW with 8–16 Ω load.

• When headphones are connected, the internal speaker

or connected external speaker does not function.

• The MAIN and SUB band audio can be mixed or sepa-

rated when using stereo headphones according to set

mode settings. (p. 57)

y MICROPHONE CONNECTOR [MIC]

Accepts the supplied or optional microphone.

•See p. 81 for appropriate microphones.

•See p. 15 for microphone connector information.

u MIC GAIN CONTROL [MIC GAIN]

Adjusts microphone input gain.

✔

How to set the microphone gain.

Set the [MIC] control so that the [MAIN]/[SUB] indicator (ALC

indicator) some times lights brighter during normal voice

transmission in SSB mode.

i RF POWER CONTROL [RF PWR]

Continuously varies the RF output power from min-

imum to maximum.

144 MHz band 5–100 W

430(440) MHz band 5–75 W

1200 MHz band 1–10 W

(optional UX-910)

RF PWR

IncreasesDecreases

MIC GAIN

Recommended level for

an Icom microphone

IncreasesDecreases

PANEL DESCRIPTION

!1 !2

o MAIN BAND INDICATOR [MAIN]

➥ Lights green while the squelch is opened or a sig-

nal is received on the MAIN band; lights red while

transmitting on the MAIN band.

•While transmitting, the indicator also shows ALC con-

dition. Brightness increases more than usual when

the ALC function is activated.

➥ Flashes when an off-frequency signal is received

and the FM center detector is activated. (p. 28)

!0 RF GAIN CONTROL/SQUELCH CONTROL

[RF/SQL] (outer control)

Adjusts the RF gain and squelch threshold level for

the MAIN band. The squelch removes noise output

from the speaker (closed condition) when no signal

is received.

•The squelch is particularly effective for FM. It is also

available for other modes.

•12 to 13 o’clock position is recommended for any setting

of the [RF/SQL] control.

•The squelch threshold position for SSB/CW mode can

be set from 12 or 13 o’clock position in SSB/CW set

mode. (p. 62)

•The control can be set as ‘Auto’ (RF gain control in SSB

and CW; squelch control in FM) or squelch control (RF

gain is ﬁxed at maximum) in set mode as follows. (p. 56)

• When setting as RF gain/squelch control

•When functioning as RF gain control

(Squelch is ﬁxed open; SSB, CW only)

•When functioning as squelch control

(RF gain is ﬁxed at maximum.)

!1 AF CONTROL [AF] (inner control)

Varies the audio output level from the speaker for

the MAIN band.

!2 SUB BAND INDICATOR [SUB]

Lights green while the squelch is opened or a signal

is received on the SUB band; lights red while trans-

mitting in satellite operation.

!3 RF GAIN CONTROL/SQUELCH CONTROL

[RF/SQL] (outer control)

Adjusts the RF gain and squelch threshold level for

the SUB band. The squelch removes noise output

from the speaker (closed condition) when no signal

is received.

AF RF/SQL

No audio output

Max. audio output

Decreases Increases

Squelch is

open.

S-meter

squelch

S-meter squelch

threshold

Noise squelch

threshold

Shallow Deep

Noise squelch

Minimum RF gain

Adjustable

range

Maximum

RF gain

Recommended level

RF gain

adjustable

range (SSB,

CW modes)

Maximum

RF gain

S-meter

squelch

Noise squelch (FM mode)

Squelch is

open.

MODE

SSB, CW

AUTO

RF GAIN

SQL

SET MODE SETTING

SQL

RF GAIN + SQL

SQL

PANEL DESCRIPTION

■ Front panel (continued)

!4 AF CONTROL [AF] (inner control)

Varies the audio output level from the speaker for

the SUB band.

!5 SET•MENU SWITCH [SET•MENU] (p. 55)

➥ Push this switch then one of [FM],

[SSB/CW], [RIT], [SCAN], [NR], [TRANS-

MIT], [COMP], [VOX], [ATT], [SWP],

[MPW] or [SPCH] to enter the indepen-

dent item set mode.

➥ Push for 1 sec. to enter the set mode for

commonly used item settings.

!6 ATTENUATOR•PRE-AMP SWITCH [ATT•P.AMP]

➥ Push to switch the attenuator function

ON and OFF. (p. 29) Use this function to

protect from signal distortion from exces-

sively strong signals.

•The attenuation level is independently ad-

justable for 144 MHz or 430(440) MHz band

in the ATT set mode. The optional 1200 MHz

band attenuation level is ﬁxed and is approx.

20 dB. (p. 65)

➥ Push for 1 sec. to switch the connected

pre-ampliﬁer ON and OFF, when an op-

tional pre-amplifier unit, AG-25, AG-35

and/or AG-1200, is connected. (p. 16)

DO NOT connect any equipment, such as an SWR

or power meter between the transceiver and pream-

pliﬁer. In such case, the preampliﬁer may not acti-

vate properly.

!7 AUTO FREQUENCY CONTROL/NOISE

BLANKER•NOISE REDUCTION SWITCH

[AFC/NB•NR]

➥ During FM/FM narrow mode operation,

push to switch the AFC (Automatic Fre-

quency Control) function ON and OFF.

(p. 28)

•Automatically tunes the operating frequency,

when an off-frequency signal is received, in

100 kHz steps. This function also follows the

signal even if the frequency is shifted.

➥ During SSB or CW mode operation, push

to switch the noise blanker function ON

and OFF. (p. 30)

•Reduces pulse-type noise, such as ignition

noise from a vehicle.

➥ Push for 1 sec. to switch the noise re-

duction function ON and OFF when an

optional DSP unit, UT-106, is installed.

(p. 31)

•Reduces unwanted noise and pulls out the

desired signal only for clear readability.

For 1 sec.

PANEL DESCRIPTION

!8 AUTO GAIN CONTROL•AUTO NOTCH FILTER

SWITCH [AGC•ANF]

➥ Push to switch the time constant of the

automatic gain control to SLOW and

FAST for the MAIN band.* (p. 28)

•SLOW selection (“FAGC” disappears) during

SSB (USB or LSB) operation, FAST selection

(“FAGC” appears) during CW, data operation

and while tuning with fast tuning dial rotation

are recommended.

*The AGC time constant can be selected on the

MAIN band only. FAST selection is fixed on

the SUB band.

➥ Push for 1 sec. to switch the automatic

notch filter function ON and OFF when

the optional DSP unit, UT-106, is in-

stalled. (p. 31)

•Reduces interference signals such as beat,

RTTY or CW signals and the notch frequency

automatically follows the interfering signal.

!9 kHz/MHz•TUNING STEP SELECTION SWITCH

[kHz/MHz] (p. 22)

➥ Push to select tuning step for the tuning

dial or scanning from 1 kHz, 1 MHz step

and regular tuning step* in sequence

•“

” appears above the 1 kHz or 1 MHz digit

when 1 kHz or 1 MHz tuning step is selected,

respectively.

*The regular tuning step is selected for each

operating mode as follows.

➥ Push for 1 sec. to enter the regular tun-

ing step selection mode.

•The tuning step can be selected for each op-

erating mode independently.

•SSB/CW mode: 1, 10, 50 and 100 Hz step;

FM mode: 0.1, 5, 6.25, 10, 12.5, 20, 25 and

100 kHz step can be selected by rotating the

tuning dial.

@0 SPEECH•LOCK SWITCH [SPCH•LOCK]

➥ Announces the receiving signal strength

and/or selected readout frequency when

the optional UT-102 is installed. (pgs. 69,

71)

➥ Push for 1 sec. to switch the tuning dial

lock function ON and OFF to prevent ac-

cidental setting changes. (p. 25)

@1 TUNING DIAL

Changes the displayed frequency, selects set mode

items, etc.

@2 BRAKE ADJUSTMENT SCREW

Adjust the tension of the tuning dial.

•Rotate clockwise to increase the tension; counterclock-

wise to decrease the tension.

@3 MEMORY CHANNEL UP/DOWN SWITCHES

[

UP]/[DOWN

] (p. 40)

➥ Push [Y UP] to change the memory

channel up; push [DOWN Z] to change

the memory channel down.

•Memory channel changes continuously while

holding either switch.

•Memory channels can be selected both in

VFO and memory modes.

For 1 sec.

Brake adjustment screw

For 1 sec.

PANEL DESCRIPTION

@4 RIT CONTROL [RIT] (p. 27)

Shifts the receive frequency without changing the

transmit frequency for the MAIN band only while the

RIT function is activated.

• SSB/CW mode : ±1.0 kHz* in 10 Hz step

• FM mode : ±5.0 kHz* in 50 Hz step

*For 1200 MHz band; ±2.0 kHz and ±10.0 kHz, respec-

tively when the optional UX-910 is installed.

• By using the Sub dial function, the RIT control can be

used as the MAIN/SUB tuning dial or the SUB band IF

shift control. See page 24 for details.

@5 IF SHIFT CONTROL [SHIFT]

Shifts the center frequency of the receiver’s IF

passband within 1.2 kHz range.

• By using the Sub dial function, the IF shift control can be

used as the MAIN/SUB tuning dial or the SUB band IF

shift control. See page 24 for details.

✔

What is the Sub dial function?

The [RIT] and [SHIFT] controls are used for RIT and IF shift

controls for the MAIN band by default. However, the Sub dial

function assigns these controls as the MAIN/SUB tuning dial

or the SUB band IF shift control. (p. 24, 68)

@6 SATELLITE SWITCH [SATELLITE]

➥ Push to enter satellite mode (RX on

MAIN, TX on SUB band). Push again to

return to the condition before entering

into the satellite mode.

➥ Push to enter satellite mode using the

current operating frequencies when

pushing for 1 sec.

•To change the normal and reverse satellite

operations, push [F-INP/ENT] for 1 sec.

@7 RIT SWITCH [RIT] (p. 27)

➥ Push to switch the RIT control activity ON

and OFF.

•“RIT” indicator appears when the RIT func-

tion is in use.

➥ Push for 1 sec. to switch the Sub dial

function ON and OFF.

•“RIT” indicator flashes and the [RIT] and

[SHIFT] controllers acts as the controllers

speciﬁed in the RIT/SHIFT set mode. (p. 68)

@8 KEYPAD

Numeral and other function keys for tuning and ac-

tivating functions.

See the table at right.

For 1 sec.

RIT S

IFT

RIT S

IFT

RIT S

IFT

Center positionMax. counter-

clockwise position

Max. clockwise

position

■ Front panel (continued)

PANEL DESCRIPTION

•Enters numeral “1” when entering an operating

frequency. (p. 23)

•Switches between VFO and memory mode.

(p. 40)

Enters numeral “2” when entering an operating

frequency. (p. 23)

•Enters numeral “3” when entering an operating

frequency. (p. 23)

•Switches between VFO A and B during VFO

mode operation. (p. 21)

Enters numeral “4” when entering an operating

frequency. (p. 23)

Enters numeral “5” when entering an operating

frequency. (p. 23)

Enters numeral “6” when entering an operating

frequency. (p. 23)

Enters numeral “7” when entering an operating

frequency. (p. 23)

•Enters numeral “8” when entering an operating

frequency. (p. 23)

•Stores the displayed operating conditions into

MEMO PAD channel (p. 44)

•Enters numeral “9” when entering an operating

frequency. (p. 23)

•Re-calls the contents in the MEMO PAD channel.

(p. 44)

•Enters decimal point “.” for entering below the

“MHz“ digits when entering an operating fre-

quency.

• Starts and cancels scanning function. (p. 46)

•Turns OFF the SUB band frequency indication

during satellite operation. In this case, only the

MAIN band frequency can be tuned by rotating

the tuning dial. (p. 49)

•Enters numeral “0” when entering an operating

frequency. (p. 23)

•Switches sweep function for the bandscope ON

and OFF. (p. 29)

•Turns OFF the MAIN band frequency indication

during satellite operation. In this case, only the

SUB band frequency can be tuned by rotating

the tuning dial. (p. 49)

Enables operating frequency entering from the

keypad. See page 23 for details.

Equalizes the condition of the VFO A and B.

(p. 21)

Shows 10 Hz and 1 Hz digits of operating fre-

quency on both the MAIN and SUB bands while

pushing and holding. (p. 22)

Stores the set conditions into a memory channel.

(p. 41)

Clears stored contents of memory channel to be

a blank channel. (p. 43)

Transfers the contents of a memory channel into

either the VFO A or B. (p. 42)

Opens squelch for monitoring the operating or

transmit frequency, and the frequency indication

automatically changes to transmit frequency in the

case of duplex or split operation. (p. 34)

Starts and cancels tone scan when the repeater

tone or tone squelch is activated in FM (narrow)

operation. (p. 47)

Used to change memory channel during memory

mode operation by rotating the tuning dial while

pushing and holding. (p. 40)

Switch Switch action when pushed Switch action when pushed for 1 sec.

PANEL DESCRIPTION

@9 SPLIT•DUPLEX SWITCH [SPLIT•DUP]

➥ Push to turn the split function, with the

VFO A and B, ON and OFF. (p. 37)

•The split operation is not available for the

SUB band.

➥ Push for 1 sec. to select the duplex (re-

peater) direction or to turn the function

OFF. (p. 34)

•The duplex operation is not available for the

SUB band.

#0 SSB/CW•CW-NARROW SWITCH

[SSB/CW•CW-N]

➥ Push to switch the operating mode be-

tween SSB and CW. (p. 23)

➥ Push for 1 sec. to switch the operating

mode between USB and LSB or between

CW and CW narrow during SSB or CW

mode, respectively.

#1 FM•FM-NARROW SWITCH [FM•FM-N] (p. 23)

➥ Push to switch the operating mode be-

tween FM and FM repeater mode.

•The duplex operation can be made in MAIN

band only, it cannot be operated in SUB

band.

➥ Push for 1 sec. to switch the operating

mode between FM and FM-N (FM nar-

row).

•The FM-N mode cannot be selected in

1200 MHz band operation.

#2 TONE SWITCH [TONE] (p. 34)

➥ Push to turn the tone encoder function

ON and OFF in FM mode. (except Eu-

rope, Sweden and Italy versions)

•“T” indicator appears in the display when the

tone encoder is activated.

➥ Push to transmit a 1750 Hz repeater tone

in FM mode for European, Sweden and

Italy versions.

Available repeater tones (Unit: Hz)

#3 MAIN/SUB CHANGE•BAND SWITCH

[M/S•BAND]

➥ Push to replace the MAIN band’s fre-

quency and mode with the SUB band’s.

(p. 19)

➥ Push for 1 sec. to change the operating

band during single band operation or

when the optional band unit, UX-910, is

installed. (p. 20)

For 1 sec.

67.0

69.3

71.9

74.4

77.0

79.7

82.5

085.4

088.5

091.5

094.8

097.4

100.0

103.5

107.2

110.9

114.8

118.8

123.0

127.3

131.8

136.5

141.3

146.2

151.4

156.7

159.8

162.2

165.5

167.9

171.3

173.8

177.3

179.9

183.5

186.2

189.9

192.8

196.6

199.5

203.5

206.5

210.7

218.1

225.7

229.1

233.6

241.8

250.3

254.1

■ Front panel (continued)

PANEL DESCRIPTION

#4 SUB•SUB OFF SWITCH [SUB•SUB OFF]

➥ Push to enable the SUB band control

from the tuning dial, keypad, etc. (p. 19)

•“SUB” indicator appears.

➥ Push for 1 sec. to turn the SUB band

readout indication ON and OFF. (p. 24)

#5 CALL•TONE SQUELCH SWITCH [CALL•T-SQL]

➥ Push to select the call channel of the op-

erating band. The call channel can be se-

lected from both the VFO and memory

mode operation. (p. 43)

➥ Push for 1 sec. to turn the tone squelch

function ON and OFF during FM mode

operation. (p. 30)

•“T-SQL” indicator appears when the tone

squelch is activated.

For 1 sec.

PANEL DESCRIPTION

q FREQUENCY READOUTS (p. 22)

Shows the operating frequency.

• Setting item name is indicated during set mode. (p. 55)

w MODE INDICATOR (p. 23)

Shows the selected operation mode.

e TUNING STEP INDICATOR (p. 22)

Appears when the 1 kHz or 1 MHz tuning step is se-

lected.

r DUPLEX INDICATOR (p. 34)

Either “DUP–” or “DUP+” appears during duplex (re-

peater) operation.

t SPLIT INDICATOR (p. 37)

Appears during split operation.

y RIT INDICATOR (p. 27)

➥ Appears while the RIT function is activated.

➥ Flashes while the SUB dial function is activated.

u VFO INDICATOR (p. 21)

Either VFO A or VFO B appears during VFO opera-

tion.

i MEMORY MODE INDICATORS/MEMORY

CHANNEL NUMBER READOUTS (p. 40)

The memory mode indicator appears during mem-

ory mode operation and the memory channel num-

ber readout shows the selected memory channel

number during both the memory and VFO mode op-

eration.

✔

Memory channel number readout

In addition to the memory channel number indication, the

memory channel number readout indicates 10 Hz and 1 Hz

digits of operating frequency while rotating the tuning dial in

SSB or CW mode with 10 or 1 Hz tuning step. After 2 sec.

from tuning dial operation, the readout indicates the memory

channel number.

o AUTO NOTCH FILTER INDICATOR (p. 31)

Appears when the optional DSP unit, UT-106, is in-

stalled, and the ANF (Automatic Notch Filter) func-

tion is activated.

!0 BLANK INDICATOR (p. 42)

Appears when the selected memory channel has

not been programmed or has been cleared.

ITCW N

NOR

OCK

T-SQSQ

9 20

60dB

ATT P.AMP.AMP

AFCAFCNBNB

FAGC NR ANF

NKNK

OVEROVER

MEMO

USBUSBLSB

RITRIT

SPLITSPLIT

VFO A

VFO B

T-SQ

TT P.AMP

AFC

AGCAGC

ANFANF

9600

COMPMP

60dB

OVER

3 5

DUP

!3!4

■ Function display

PANEL DESCRIPTION

!1 DATA TRANSMISSION SPEED INDICATOR

(p. 52)

Appears when 9600 bps speed is selected for

packet transmission.

!2 SPEECH COMPRESSOR INDICATOR (p. 36)

Appears when the speech compressor is activated.

!3 SET INDICATOR (p. 55)

Appears when [SET] is pushed.

Disappears after any switch is pushed.

!4 VOX INDICATOR (p. 33)

Appears when the VOX function is activated.

!5 SWEEP INDICATOR (p. 29)

Flashes while the simple bandscope function is ac-

tivated.

!6 SCAN INDICATOR (p. 46)

Flashes while scanning.

!7 NOISE REDUCTION INDICATOR (p. 31)

Appears when the optional DSP unit, UT-106, is in-

stalled and the noise reduction is activated.

!8 AGC TIME CONSTANT INDICATOR (p. 28)

Appears when the FAST AGC time constant is se-

lected; disappears when the SLOW AGC time con-

stant is selected.

!9 NOISE BLANKER INDICATOR (p. 30)

Appears when the noise blanker function is acti-

vated.

@0 AUTO FREQUENCY CONTROL INDICATOR

(p. 28)

Appears when the AFC (Automatic Frequency Con-

trol) function is activated.

@1 PRE-AMP INDICATOR (p. 16)

Appears when the optional pre-amplifier unit,

AG-25, AG-35 and/or AG-1200, is connected and

the pre-ampliﬁer function is activated.

@2 ATTENUATOR INDICATOR (p. 29)

Appears when the attenuator is activated.

@3 MULTI-FUNCTION BAR METER

➥ Shows the receiving signal strength as an S-

meter while receiving. Peak hold function is avail-

able and can be switched ON and OFF in regular

set mode. (pgs. 26, 56)

➥ Shows the relative transmit output power level as

an RF power indicator during transmit. (p. 32)

➥ Shows signal availability in the sweeping band,

and the “▼” indicator indicates the center of the

sweeping frequency band.

@4 TONE SQUELCH INDICATOR (pgs. 30, 34)

“T” appears when the tone encoder function is acti-

vated; “T-SQL” appears when the tone squelch

function is activated.

@5 SUB INDICATOR (p. 19)

Appears when the SUB band access is enabled.

@6 SATELLITE INDICATOR (p. 49)

Appears while satellite operation mode is selected.

• - : Satellite operation with normal mode

is selected.

• - : Satellite operation with reverse mode

is selected.

@7 REMOTE INDICATOR (p. 78)

Appears when the transceiver is controlled remotely

via the optional CI-V level converter, CT-17.

@8 LOCK INDICATOR (p. 25)

Appears when the dial lock function is activated.

REV

SATL

NOR

SATL

PANEL DESCRIPTION

■ Rear panel

q 430(440) MHz ANTENNA CONNECTOR (p. 15)

Accepts a 50 Ω antenna with a type-N connector.

w DC POWER SOCKET [DC 13.8V] (p. 17)

Accepts 13.8 V DC through the supplied DC power

cable (OPC-657A).

e 144 MHz ANTENNA CONNECTOR (p. 15)

Accept a 50 Ω antenna with a PL-259 connector.

r SUB BAND EXTERNAL SPEAKER JACK

[SP (SUB)]

t MAIN BAND EXTERNAL SPEAKER JACK

[SP (MAIN)] (p. 16)

Accepts a 4–8 Ω speaker.

By connecting an external speaker for each or both

jacks, the audio for both the MAIN and SUB bands

is output as follows.

y 1200 MHz ANTENNA CONNECTOR (p. 15)

Available when the optional 1200 MHz band unit is

installed. Accepts a 50 Ω antenna with a type-N

connector.

u KEY JACK [KEY] (p. 15)

Accepts a paddle, a straight key or external elec-

tronic keyer with

⁄8 inch standard plug.

i SUB BAND DATA SOCKET [DATA (SUB)]

o MAIN BAND DATA SOCKET [DATA (MAIN)]

(p. 13)

6-pin mini plug DIN jack to connect a TNC, etc. for

high speed data communications.

Simultaneous data communications are provided by

equipping independent data sockets for both MAIN

and SUB bands.

!0 ACCESSORY SOCKET [ACC(1)]

Enables connection of external equipment such as

a TNC for data communications, etc.

• See the right table for socket information.

!1 CI-V REMOTE CONTROL JACK [REMOTE]

(p. 78)

Designed for use with a personal computer via the

optional CT-17 for remote control of transceiver

functions.

!2 GROUND TERMINAL [GND] (p 14)

Connect this terminal to a ground to prevent electri-

cal shocks and other problems.

(dot)

(com)

(dash)

(+)

(_)

Rear panel

view

MAIN AF SUB AF

No Int. SP Int. SP

SP (MAIN) Ext. SP Ext. SP

SP (SUB) Int. SP Ext. SP

Both Ext. SP (MAIN) Ext. SP (SUB)

DATA Socket Pin No. Pin Name Description

ACC(1) Socket Pin No. Pin Name Description Speciﬁcation

PANEL DESCRIPTION

D ACC SOCKETS

D DATA SOCKETS

o MAIN BAND DATA SOCKET

GND

SEND

MOD

SQLS

13.8 V

ALC

No connection.

Connect to ground.

Input terminal to transmit the trans-

ceiver in relation to the external equip-

ment. (Grounded: transmits)

Input terminal for the modulation cir-

cuit.

Output terminal for AF signals from

the AF detector circuit. Output level is

ﬁxed, regardless of [AF] control.

Output terminal for squelch condition

(Open/Close). Outputs grounded level

signal when squelch is opened.

Output terminal for 13.8 V DC, in re-

lation to the [POWER].

Input terminal for ALC control.

Transmit voltage : –0.5 to +0.8 V

Output current : Less than 20 mA

Input current (Tx) : Less than 200 mA

Output impedance : 10 kΩ

Input level : 100 mV rms

Output impedance : 4.7 kΩ

Output level : 100–300 mV rms

Squelch open : Less than 0.3 V/5 mA

Squelch close : More than 6.0 V/100 µA

Output current : Less than 1 A

Input impedance : More than 10 kΩ

Control voltage : –4 to 0 V

DATA IN

GND

PTTP

DATA

OUT

AF OUT

SQL

Input terminal for data (common for both 1200 and 9600 bps)

Ground line for the DATA IN, DATA OUT and AF OUT.

Transmits when this terminal is grounded.

Received data output terminal for 9600 bps operation.

Received data output terminal for 1200 bps operation.

Output terminal for squelch condition (Open/Close). Outputs grounded level signal

when squelch is opened, +8 V level signal when squelch is closed.

DATA Socket Pin No. Pin Name Description

DATA IN

GND

DATA

OUT

AF OUT

SQL

Input terminal for data (common for both 1200 and 9600 bps)

Ground line for the DATA IN, DATA OUT and AF OUT.

No connection.

Received data output terminal for 9600 bps operation.

Received data output terminal for 1200 bps operation.

Output terminal for squelch condition (Open/Close). Outputs grounded level signal

when squelch is opened, +8 V level signal when squelch is closed.

i SUB BAND DATA SOCKET

INSTALLATION AND CONNECTIONS

■ Unpacking

After unpacking, immediately report any damage to the

delivering carrier or dealer. Keep the shipping cartons.

For a description and a diagram of accessory equip-

ment included with the IC-910H, see ‘Supplied acces-

sories’ on p. 1 of this manual.

■ Grounding

To prevent electrical shock, television interference

(TVI), broadcast interference (BCI) and other prob-

lems, ground the transceiver through the GROUND

terminal on the rear panel.

For best results, connect a heavy gauge wire or strap

to a long earth-sunk copper rod. Make the distance be-

tween the [GND] terminal and ground as short as pos-

sible.

R WARNING: NEVER connect the [GND]

terminal to a gas or electric pipe, since the connec-

tion could cause an explosion or electric shock.

■ Selecting a location

Select a location for the transceiver that allows ade-

quate air circulation, free from extreme heat, cold, or

vibrations, and away from TV sets, TV antenna ele-

ments, radios and other electro-magnetic sources.

The base of the trans-

ceiver has an ad-

justable stand for desk-

top use. Set the stand

to depending on your

operating conditions.

■ Antenna connection

For radio communications, the antenna is of critical im-

portance, along with output power and sensitivity. Se-

lect antenna(s), such as a well-matched 50 Ω antenna,

and feedline. 1.5:1 or better of Voltage Standing Wave

Ratio (VSWR) is recommended for your desired band.

Of course, the transmission line should be a coaxial

cable.

CAUTION: Protect your transceiver from lightning

by using a lightning arrestor.

PL-259 CONNECTOR INSTALLATION EXAMPLE TYPE-N CONNECTOR INSTALLATION EXAMPLE

30 mm ≈

⁄8 in 10 mm ≈

⁄8 in 1–2 mm ≈

⁄16 in

Slide the coupling ring

down. Strip the cable

jacket and soft solder.

Slide the connector body

on and solder it.

Screw the coupling ring

onto the connector body.

Strip the cable as shown at

left. Soft solder the center

conductor.

Slide the nut, rubber

gasket and clamp over the

coaxial cable, then cut the

end of the cable evenly.

Strip the cable and fold the

braid back over the clamp.

Soft solder the center

conductor. Install the

center conductor pin and

solder it.

Carefully slide the plug

body into place aligning the

center conductor pin on the

cable. Tighten the nut onto

the plug body.

15 mm

3 mm

6 mm

30 mm

10 mm (soft solder)

10 mm

1–2 mm

solder solder

Soft

solder

Coupling ring

No space

Solder hole

Be sure the center conductor is

the same height as the plug body.

Clamp

Center

conductor

Washer

Nut Rubber gasket

DC POWER SUPPLY (p. 17)

[430(440)MHz ANT]

(p. 14)

[1200MHz ANT] (p. 14)

[144MHz ANT] (p. 14)

[KEY] jack (p. 38)

GROUND (p. 14)

Required for optional

UX-910 operation.

13.8 V DC

More than 25 A

(dot)

(com)

(dash)

INSTALLATION AND CONNECTIONS

SM-20 DESKTOP

MICROPHONE (optional)

MICROPHONE CONNECTOR (Front panel view)

Input impedance:

8–16 Ω

Audio output power:

5 mW with 8 Ω load

Output power may differ

according to the headphone

HM-12 HAND

MICROPHONE

HEADPHONES

q MIC (Microphone input)

w +8V (Max. 8 V DC 10 mA)

e MIC U/D (Frequency up/down)

r SQL S (Squelch switch)

t PTT

y GND (PTT ground)

u GND (Microphone ground)

i AF OUT (varies with [AF])

CAUTION: DO NOT short pin 2 to ground as this can damage the

internal 8 V regulator. DC voltage is applied to pin 1 for microphone

operation. Take care when using a non-Icom microphone.

■ Required connections

• Front panel

• Rear panel

INSTALLATION AND CONNECTIONS

MB-23 CARRYING HANDLE

PREAMP (p. 59)

(144 MHz/430(440) MHz/1200 MHz)

EXTERNAL SPEAKER

(MAIN/SUB) (p. 12)

CT-17

144 MHz : AG-25

430(440) MHz : AG-35

1200 MHz : AG-1200

External all-weather, mast

mounting preamplifiers are

available.

MAIN

144 MHz430(440) MHz 1200 MHz (optional)

SUB

Use 4–8 Ω speakers.

[REMOTE] (p. 78)

Used for computer control and transceive

operation.

Used for external

equipment control.

ACC SOCKETS

(pgs. 13, 52)

DATA SOCKETS

(MAIN/SUB) (pgs. 13, 52)

CAUTION: NEVER

connect equipment

(i.e. power, SWR meter)

between transceiver

and preamplifier.

■ Advanced connections

• Front panel

• Rear panel

AC outlet

AC cable

13.8 V DC 25 A

A DC power supply

Black

Red

IC-910H

Supplied DC

power cable

INSTALLATION AND CONNECTIONS

24V

Ciga

IC-910H

12 V

battery

Supplied

DC power cable

+ red

_ black

Crimp

Solder

Grommet

CONNECTING A VEHICLE BATTERY

CONNECTING A DC POWER SUPPLY

■ Power supply connections

Use an optional DC power supply with a 25 A capacity

and above when operating the transceiver with AC

power. Refer to the diagrams below.

CAUTION: Before connecting the DC power

cable, check the following important items. Make

sure:

• The [POWER] switch is OFF.

•Output voltage of the power source is 12–15 V

when you use a non-Icom power supply.

• DC power cable polarity is correct.

Red : positive + terminal

Black : negative _ terminal

NEVER connect to

a 24 V battery.

NEVER use the cig-

arette lighter socket as

a power source.

NOTE: Use terminals for

the cable connections.

■ Initial settings

After resetting the transceiver, set controls and

switches as shown in the ﬁgure below.

Turn power ON, then check the display. If any of the

following indicators appear, turn them OFF as follows:

• Quick tuning step indicator “▼” : Push [kHz/MHz].

• RIT indicator “RIT” : Push [RIT].

• Split indicator “SPLIT” : Push [SPLIT].

CCW : Max. counterclockwise

BASIC OPERATION

■ When ﬁrst applying power (CPU resetting)

Before ﬁrst applying power, make sure all connections

required for your system are complete by referring to

Chapter 3. Then, reset the transceiver using the fol-

lowing procedure.

q Make sure the transceiver power is OFF.

w While pushing [MW 4] and [M-CL 5], push

[POWER] to turn power ON.

• The internal CPU is reset.

• The transceiver displays its initial VFO frequencies when

resetting is complete.

Resetting CLEARS all programmed contents in

memory channels and returns programmed values

in set mode to default values.

[POWER] [MW 4] [M-CL 5]

VFO A

VFVF

9 2020

4040

60dB60dB

60dB

3 5

[TRANSMIT]: OFF

[COMP]: OFF

[VOX]: OFF

[AF] (SUB band):

CCW

[RF/SQL]: (SUB band)

12 o’clock

[MIC]: CCW

[SET]: OFF

[ATT(P.AMP)]: OFF

[RF PWR]: CCW

[AFC/NB]: OFF

[AGC]: OFF

[RIT]: 12 o’clock

[SHIFT]: 12 o’clock

[RIT]: OFF

[POWER]: OFF

[AF] (MAIN band):

CCW

[RF/SQL] (MAIN band):

12 o’clock

[SATELLITE]: OFF

BASIC OPERATION

■ MAIN and SUB bands

The IC-910H has dual bands: 144 MHz and 430(440)

MHz. These bands can be assigned to the MAIN and

SUB bands for operating convenience.

Each MAIN and SUB bands have independent fea-

tures.

The MAIN band is the operation for both transmit and

receive, and is displayed in the upper area of the func-

tion display. The SUB band is the operation for only re-

ceive, and is displayed in the lower area of the function

display.

Simultaneous receive on both the MAIN and SUB

bands is possible, however the transmission can

only be transmitted on the MAIN band— not on the

SUB band.

In the case of satellite operation mode, the SUB

band is used for the transmission band.

Exchanging the MAIN and SUB bands

The function display shows both the MAIN and SUB

band frequencies and both bands can receive signals

simultaneously.

Assign 144 MHz or 430(440) MHz band, whichever

band you want to transmit or be called on, as the MAIN

band.

➥ Push [M/S] to exchange the MAIN and SUB bands.

VFO A

VFVF

9 20

60dB60dB

60dB

3 5

MAIN band display

SUB band display

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

MAIN band display

SUB band display

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Accessing the SUB band

Normally, any operations, such as tuning, operating

mode selection, memory channel selection and pro-

gramming, etc., are performed on the MAIN band.

However, these operations can be performed on the

SUB band by using the SUB band access capability.

➥ Push [SUB] to switch the SUB band access capa-

bility ON and OFF.

•“SUB” indicator appears while the SUB band access ca-

pability is activated.

•Even during SUB band access, transmission cannot be

made on the SUB band.

BASIC OPERATION

■ Operating band selection (optional UX-910 is required)

The IC-910H can be used on the additional 1200 MHz

band with the optional UX-910. The operating band

can be selected by pushing [M/S•BAND] for 1 sec.

Selecting on the MAIN band

q Push [SUB] to cancel the SUB band access, if re-

quired.

w Push [M/S•BAND] for 1 sec. to select operating

band.

NOTE: The same operating band cannot be as-

signed on both MAIN and SUB bands, simultane-

ously.

Selecting on the SUB band

q Push [SUB] to enable the SUB band access.

•“SUB” indicator appears.

w Push [M/S•BAND] for 1 sec. to select operating

band.

[SUB] [M/S•BAND]

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Select 1200 MHz to MAIN band.

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Select 1200 MHz to SUB band.

BASIC OPERATION

■ VFO description

The IC-910H has two VFOs for both bands, specially

suited for instant selection of 2 frequencies or split fre-

quency operation. The VFOs are called VFO A and

VFO B. You can use the desired VFO to call up a fre-

quency and operating mode for your operation.

VFO is an abbreviation of Variable Frequency Oscilla-

tor, and traditionally refers to an oscillator.

Selecting the VFO A/B

➥ Push [A/B 3] to switch between the VFO A and

VFO B.

VFO equalization

➥ Push [A=B 2] for 1 sec. to equalize the undisplayed

VFO condition to the displayed VFO.

•3 beeps sound when the VFO equalization is completed.

Use two VFOs as a quick memory

When you ﬁnd a new station, but you wish to con-

tinue searching, the two VFO system can be used

for quick memory storage.

q Push [A=B 2] for 1 sec. to store the displayed fre-

quency into the undisplayed VFO.

w Continue searching for stations.

e Push [A/B 3] to retrieve the stored frequency.

r To continue searching for stations, push [A/B 3]

again.

CONVENIENT

VFO A

VFO B

VFO selection

VFO A

VFO B

undisplayed VFO

Equalizes the undisplayed VFO condition

to the displayed VFO.

displayed VFO

BASIC OPERATION

■ Frequency setting

The IC-910H has several tuning steps and a

[kHz/MHz] switch for convenient frequency tuning.

q Push [M/S] to select the desired frequency band as

the MAIN band; or push [SUB] to access the SUB

band.

w Rotate the tuning dial to select the frequency.

• The memory channel number changes to the 10 and

1 Hz digits when rotating the tuning dial with 1, 10,

100 Hz and 6.25 kHz tuning steps.

• When you want to check the 10 and 1 Hz digits during

memory channel number indication, push and hold [A/B]

(10 and 1 Hz digits are indicated while holding).

Tuning step selection

Tuning steps can be pre-set independently for FM and

SSB/CW. The following steps are selectable.

• FM : 0.1, 5, 6.25, 10, 12.5, 20, 25 or 100 kHz

• SSB/CW : 1, 10, 50 or 100 Hz

q Push [M/S] to select the desired frequency band as

the MAIN band; or push [SUB] to access the SUB

band.

w Push [FM] or [SSB/CW] to select the desired oper-

ation mode.

e Push [kHz/MHz•TS] for 1 sec. to enter the tuning

step set mode.

r Rotate the tuning dial to select the desired tuning

step.

t Push [kHz/MHz•TS] to return to previous display.

Quick tuning step

The operating frequency can be changed in 1 kHz

steps or 1 MHz steps for quick tuning.

➥ Push [kHz/MHz•TS] to switch the quick tuning step

in sequence 1 kHz, 1 MHz and OFF.

USBUSB

VFO A

USBUSB

10 Hz/1 Hz indication

While tuning

[kHz/MHz•TS] for 1 sec.

USBUSB

(20 kHz tuning step)

(10 Hz tuning step)

FM mode tuning step set mode

SSB/CW mode tuning step set mode

[kHz/MHz•TS]

VFO A

1 kHz tuning step1 MHz tuning step

BASIC OPERATION

Frequency setting with the keypad

The operating frequency can be directly entered from

the keypad.

q Push [F-INP ENT] to access the keypad frequency

entry.

• All digits of frequency indication disappear.

w Push numeral keys to enter the desired operating

frequency.

• The entered number is indicated from the 100 Hz digit.

e Push [F-INP ENT] to set the frequency.

[EXAMPLE]

145.3400 MHz

[F-INP ENT] [1] [4] [5] [.] [3] [4] [F-INP]

435.0000 MHz

[F-INP ENT] [4] [3] [5] [.] [F-INP ENT]

439.1200 MHz

[F-INP ENT] [4] [3] [9] [.] [1] [2] [F-INP ENT]

439.1200 MHz to 439.2604 MHz

[F-INP ENT] [.] [2] [6] [0] [4] [F-INP ENT]

Pushing numeral keys to 100 Hz digit without push-

ing [.] also sets the desired operating frequency.

keypad

Operating mode selection

SSB (USB/LSB), CW, CW-N (CW narrow), FM and

FM-N (FM narrow) modes are available in the

IC-910H. Select the desired operation mode as fol-

lows.

• Selecting SSB mode

➥ Push [SSB/CW] to select USB mode.

•USB mode is generally used for SSB phone operation

on the VHF and UHF bands.

•Push [SSB/CW] for 1 sec. after USB mode selection to

switch between USB and LSB mode.

• Selecting CW mode

➥ Push [SSB/CW] to select CW mode.

•Push [SSB/CW] for 1 sec. after CW mode selection to

switch between CW and CW narrow mode.

The optional CW narrow ﬁlter, FL-132 or FL-133, is

required for the MAIN or SUB bands, respectively.

In satellite operation, the optional FL-133 is neces-

sary to operate CW narrow mode in the MAIN (re-

ceive) band. No audio is output until the optional

CW narrow ﬁlter is installed in the CW narrow mode.

• Selecting FM mode

➥ Push [FM] to select FM mode.

•Push [FM] after FM mode selection to turn the repeater

mode (duplex negative with repeater tone ON) ON and

OFF.

•Push [FM] for 1 sec. after FM mode selection to switch

between FM and FM narrow mode.

•When the optional UT-102 voice synthesizer unit

is installed.

The UT-102 announces the selected mode in an elec-

tronically-generated voice when [SSB/CW] or [FM] is

pushed. (pgs. 69, 71)

[FM] [SSB/CW]

When the [RIT] control is assigned as

SUB tuning dial

q Push [RIT] for 1 sec.

•“RIT” indicator flashes when the SUB tuning dial func-

tion is activated.

w Rotate [RIT] control for the desired tuning direction

and speed.

• Tuning speed can be adjusted in ±5 steps.

e Set [RIT] control to the center position to stops tun-

ing.

• A beep tone sounds when [RIT] control is set to the cen-

ter.

r Push [RIT] to cancel the SUB tuning dial function.

BASIC OPERATION

■ SUB band OFF

The SUB band indication can be deactivated to sim-

plify operation.

➥ Push [SUB•SUB OFF] for 1 sec. to turn the SUB

band indication ON and OFF.

• Push [M/S•BAND] for 1 sec. to change the operating

band. (p. 20)

■ SUB tuning dial

The IC-910H has a large main tuning dial for frequency

setting. In addition, the [RIT] or [SHIFT] controls can

be used as a SUB tuning dial for dual band simultane-

ous tuning, etc. The SUB tuning dial changes the op-

erating frequency continuously at a variable speed.

To use the SUB tuning dial function, assign the func-

tion to either the [RIT] or [SHIFT] control using the

RIT/SHIFT set mode.

The assigned control can be used for its original

function, however, both functions cannot be used si-

multaneously.

VFO A

60dB

3 5

SUB band indication OFF.

[SUB•SUB OFF] for 1 sec.

RITRIT

VFOA

VFOAVFOA

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

While [RIT] is flashing, SUB band can be

controlled with sub dial function.

Advances the

frequency and

increases the

speed.

Reverses the

frequency and

increases the

speed.

SUB dial

functions

slightly.

BASIC OPERATION

SUB tuning dial assignment

q Push [SET] then [RIT] to enter the RIT/SHIFT set

mode.

w Push [DN ▼] or [▲ UP] to select [RIT] or [SHIFT]

control to be assigned.

•“rit nob” or “SFt nob” appears.

e Rotate the tuning dial to select the condition as de-

scribed below.

•Pushing [M-CL 5] for 1 sec. selects the default setting.

r Push [SET] to exit from the RIT/SHIFT set mode.

[SET] [DN ▼][▲ UP]

[RIT]

[SHIFT]

The [RIT] control functions as [RIT]

even when the SUB tuning dial

function is in use. (default)

The [RIT] control can be used for

MAIN band tuning.

The [RIT] control can be used for

SUB band tuning.

The [RIT] control can be used for

SUB band IF shift control.

The [SHIFT] control functions as

[SHIFT] even when the SUB tuning

dial function is in use. (default)

The [SHIFT] control can be used for

SUB band IF shift control.

The [SHIFT] control can be used for

MAIN band tuning.

The [SHIFT] control can be used for

SUB band tuning.

■ Dial lock function

The dial lock function prevents accidental changes

caused by the tuning dial (including the SUB tuning dial

function).

➥ Push [SPCH•LOCK] for 1 sec. to turn the dial lock

function ON and OFF.

•“LOCK” indicator appears while the dial lock function is

activated.

VFO A

VFVF

OCK

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

LOCK indicatior

[SPCH•LOCK] for 1 sec.

■ Functions for receive

Volume setting

➥ Rotate [AF] control for the speciﬁed operating band

(MAIN or SUB) to output a suitable audio level.

Squelch setting

The squelch removes noise output from the speaker

(closed position) when no signal is received. The

squelch is particularly effective for FM. It is also avail-

able for other modes.

With the default setting, noise squelch and S-meter

squelch in FM, RF gain and S-meter squelch in

SSB/CW mode operation are assigned to [RF/SQL]

control. The assignment can be changed in the gen-

eral set mode. (p. 56)

• When operating in FM

q Rotate [RF/SQL] fully counterclockwise.

w Rotate [RF/SQL] clockwise to the position where

the noise just disappears.

• MAIN/SUB band indicator also goes OFF.

By rotating [RF/SQL] to a deeper position (clockwise),

the S-meter will move and the S-meter squelch func-

tion will be activated. When the S-meter squelch is ac-

tivated, weak signals, weaker than the S-meter

squelch set level, are ignored.

• When operating in SSB/CW

q Rotate [RF/SQL] fully counterclockwise.

w Rotate [RF/SQL] clockwise to the position where

the maximum RF gain (S-meter bar disappears),

MAIN/SUB band indicator goes OFF, and floor

noise disappears.

•With the default setting, the squelch opens at 12 o’clock

position, however, the squelch threshold level can be set

to 13 o’clock (1 o’clock) position in the SSB/CW set

mode. (p. 62)

•When rotating [RF/SQL] counterclockwise, RF gain de-

creases (lower sensitivity) and the S-meter bar appears

to indicate the receivable RF signal level.

[RF/SQL] (SUB)

[RF/SQL] (MAIN)

RECEIVE AND TRANSMIT

[AF] (SUB)

[AF] (MAIN)

■ RIT function

The RIT (Receive Incremental Tuning) function com-

pensates for off-frequencies of the communicating sta-

tion without moving the transmit frequency.

The RIT function can be used for the MAIN band only.

The function affects the MAIN band even when ac-

cessing the SUB band.

q Push [RIT] to turn the RIT function ON.

•“RIT” indicator appears.

w Rotate [RIT] control to cancel the off-frequencies.

•Rotate [RIT] control to the center position, after commu-

nication.

e Push [RIT] to cancel the RIT function.

•“RIT” indicator disappears.

RIT variable range

SSB/CW mode : ±1.0 kHz in 10 Hz steps (±2.0 kHz for

optional 1200 MHz band)

FM mode : ±5.0 kHz in 50 Hz steps (±10.0 kHz

for optional 1200 MHz band)

RITRIT

FM mode

RITRIT

USBUSB

RIT variable range is displayed for 2 sec.

and then returns to frequency indication.

RIT variable range is displayed for 2 sec.

and then returns to frequency indication.

SSB mode

[RIT] control

[RIT] switch

RECEIVE AND TRANSMIT

■ IF shift function

The IF shift function electronically changes the pass-

band frequency of the IF (Intermediate Frequency) and

cuts out higher or lower frequency components of the

IF to reject interference. The function shifts the IF fre-

quency up to ±1.2 kHz in 100 Hz steps in SSB/CW

mode. The IF shift is especially useful in SSB opera-

tion and not available in FM mode.

The IF shift function can be used for the SUB band

using the SUB tuning dial function (p. 24)

MAIN band IF shift operation

q Set the [SHIFT] control to its center position when

there is no interference.

w Rotate the [SHIFT] control to adjust for minimum in-

terference signal level.

• The audio tone may change while the IF shift is in use.

SUB band IF shift operation

q Assign the SUB band IF shift function to either [RIT]

or [SHIFT] control using the RIT/SHIFT set mode

(p. 68).

w Push [RIT] for 1 sec. to turn the SUB tuning dial

function ON.

•“RIT” indicator ﬂashes.

e Rotate [RIT] or [SHIFT] control for a minimum inter-

ference signal level.

r Push [RIT] to cancel the SUB tuning dial function.

•“RIT” indicator disappears.

•Set [RIT] or [SHIFT] control to the center position after

the communication.

In satellite operation mode, the SUB tuning dial

function cannot be activated. Therefore, the [SHIFT]

control acts as an IF shift for the receive band (dis-

played in the upper area).

Center positionMax. counter-

clockwise position

Max. clockwise

position

RECEIVE AND TRANSMIT

■ AGC time constant

The AGC (Automatic Gain Control) controls receiver

gain to produce a constant output level even when the

received signal strength is varied by fading, etc. Use

AGC slow for normal phone operation; AGC fast for re-

ceiving data and searching for signals.

➥ Push [AGC] to switch the time constant between

fast and slow.

•“FAGC” indicator appears when AGC fast is selected.

• The AGC time constant is ﬁxed in FM mode regardless

of the FAGC indicator.

The SUB band’s AGC is automatically selected as

slow in SSB and fast in CW. AGC time constant cannot

be changed in FM mode.

■ AFC function

The AFC (Automatic Frequency Control) automatically

tunes the operating frequency when receiving an off-

frequency signal or receiving signal shifts in FM or FM

narrow mode.

➥ Push [AFC/NB] to turn the AFC function ON and

OFF.

•“AFC” indicator appears when the AFC function is acti-

vated.

When strong nearby signals are available, the AFC

function may tune to those signals.

■ FM center indicator

The MAIN/SUB band indicators indicate the received

signal deviation in FM mode. When an off-center sig-

nal is received, the indicator ﬂashes.

When an off-center signal is received, rotate the tun-

ing dial or use the RIT function to illuminate the indica-

tor continuously.

The FM center indicator can be turned OFF using the

FM set mode. (p. 61)

[AGC]

VFO A

AGCAGC

[AFC/NB]

VFO A

AFCAFC

Flashes in 300 msec. intervals.

■ Attenuator

The attenuator prevents desired signals from distort-

ing when very strong signals are near the desired fre-

quency, or when very strong electric fields, such as

from broadcasting stations are near from your location.

The attenuator can be set to both or either band sepa-

rately, and the attenuation level can be set for each

band independently.

➥ Push [ATT] to turn the attenuator ON and OFF.

•“ATT” indicator appears when the attenuator is activated.

Setting the attenuation level

q Push [M/S•BAND] or [SUB] to select the desired

band of the attenuation level to be set.

w Push [SET] then [ATT] to enter the attenuator set

mode.

e Rotate the tuning dial to select attenuation level.

• Push [M-CL 5] to return to the default value.

r Push [SET] to exit the attenuator set mode.

NOTE: When using the noise blanker, received

audio may be distorted if they are excessively

strong.

■ Simple band scope

This function allows you to visually “sweep” an area

surrounding the set frequency for other signals. De-

tected signals are indicated graphically on the S-meter.

q Set the operating frequency and mode.

w Push [SWP 0] to turn the simple band scope func-

tion ON and OFF.

•“SWP” indicator flashes when the simple band scope

function is activated.

•Detected signals are indicated using the S-meter and

“▼” indicator, displayed above the S-meter, shows the

center frequency (displayed frequency).

•The signal availability is detected by the noise squelch

condition (open or close).

e To monitor the detected signal, rotate the tuning dial

to set the appearing “dot” of the S-meter to below

the “▼” indicator.

•The frequency readout shows the detected signal fre-

quency.

Setting sweeping time interval

q Push [SET] then [SWP 0] to enter the sweep set

mode.

w Rotate the tuning dial to select sweeping time inter-

val.

• Push [M-CL 5] to return to the default value.

e Push [SWP 0] to exit the sweep set mode.

RECEIVE AND TRANSMIT

[ATT]

VFO A

[SWP 0]

VFOA

Indicates detected signals Sweep center

Shows ±10 channels around the displayed

frequency.

Attenuation levels

144 MHz/ 0–100% variable

430(440) MHz bands Approx. 15 dB attenuation

at 100% setting

1200 MHz band Approx. 20 dB ﬁxed

(optional)

RECEIVE AND TRANSMIT

■ Noise blanker

When operating in SSB or CW mode, pulse-type noise

may be received such as from car ignitions. In this

case, the noise blanker eliminates such noise.

The noise blanker is effective on both the MAIN and

SUB bands but cannot be used for FM, or non-pulse-

type noise.

➥ Push [AFC/NB] to turn the noise blanker function

ON and OFF.

•“NB” indicator appears when the noise blanker is acti-

vated.

• The noise blanker turns ON or OFF for both bands si-

multaneously.

When using the noise blanker, received audio may

be distorted if the signals are excessively strong.

■ Tone squelch operation

The tone squelch opens only when receiving a signal

with the same pre-programmed subaudible tone. You

can silently wait for a call from group members using

the same tone. You can check the tone frequency

using the tone scan function if desired. (p. 47)

q Select the desired band by pushing [M/S•BAND].

w Push [FM] to select FM mode, then set the desired

frequency.

e Push [CALL•T-SQL] for 1 sec. to activate the tone

squelch.

•“T-SQL” indicator appears.

r When the signal with correct tone is received, the

squelch opens and audio can be heard.

• When a signal with incorrect tone or no tone is received,

the squelch does not open, however, the S-meter indi-

cates the signal strength.

• Push and hold [CHECK 7] to open the squelch manually

and keep pushing to monitor.

t Operate the transceiver in a normal way (push

[PTT] to transmit; release [PTT] to receive).

y Push [CALL•T-SQL] for 1 sec. to cancel the tone

squelch.

•“T-SQL” indicator disappears.

Setting the tone squelch frequency

The tone squelch frequencies can be independently

set for each band.

q Push [M/S•BAND] to select the band for the tone

squelch frequency to be set.

w Push [SET] then [FM] to enter the FM set mode.

e Push [DN ▼] or [▲ UP] to select tone squelch fre-

quency item.

r Rotate the tuning dial to select the desired tone

squelch frequency.

t Push [FM] to exit from the FM set mode.

Tone frequency list unit: Hz

VFO A

T-SQ

[SET] Tuning dial

[FM][CALL•T-SQL]

[DN √]/[∫ UP]

67.0

69.3

71.9

74.4

77.0

79.7

82.5

085.4

088.5

091.5

094.8

097.4

100.0

103.5

107.2

110.9

114.8

118.8

123.0

127.3

131.8

136.5

141.3

146.2

151.4

156.7

159.8

162.2

165.5

167.9

171.3

173.8

177.3

179.9

183.5

186.2

189.9

192.8

196.6

199.5

203.5

206.5

210.7

218.1

225.7

229.1

233.6

241.8

250.3

254.1

[AFC/NB]

VFO A

RECEIVE AND TRANSMIT

■ Optional DSP functions

To activate the following functions, the optional DSP

unit, UT-106, must be installed for both or either the

MAIN and/or SUB bands.

NR (Noise Reduction) function

This function reduces noise components and picks out

desired signals which are buried in noise. The received

audio signals are converted to digital signals and then

the desired signals are separated from the noise. The

noise reduction function is available for all operating

modes.

q Push [M/S•BAND] or [SUB] to select the band you

wish to activate, if required.

w Push [AFC/NB•NR] for 1 sec. to turn the noise re-

duction function ON and OFF.

•“NR” indicator appears while the automatic notch ﬁlter is

activated.

Setting the noise reduction level

q Push [SET] then [AFC/NB•NR] to enter the noise

reduction set mode.

w Rotate the tuning dial to select the desired noise re-

duction level.

• Push [M-CL 5] for 1 sec. to return to the default value.

e Push [AFC/NB•NR] to exit from the noise reduction

set mode.

USBUSB

VFO A

[AFC/NB•NR] for 1 sec.

ANF (Automatic Notch Filter) function

This function automatically attenuates beat tones, tun-

ing signals, etc., even if they are moving. The auto-

matic notch ﬁlter functions in SSB/FM modes.

q Push [M/S•BAND] or [SUB] to select the band you

wish to activate, if required.

w Push [AGC•ANF] for 1 sec. to turn the automatic

notch ﬁlter function ON and OFF.

•“ANF” indicator appears while the automatic notch ﬁlter

is activated.

USBUSB

VFO A

ANFANF

[AGC•ANF] for 1 sec.

Unwanted tone

frequency

Desired

signal (AF)

Desired

signal (AF)

Particular frequency

is attenuated

Auto notch OFF Auto notch ON

optional UT-106

RECEIVE AND TRANSMIT

■ Functions for transmit

Output power

The transmit output power can be continuously ad-

justed with [RF PWR].

Available power

144 MHz band : 5–100 W

430(440) MHz band : 5–75 W

1200 MHz band : 1–10 W (optional)

NOTE: To prevent interference, listen on the fre-

quency to make sure the frequency is clear before

transmitting by pushing [CHECK 7].

[RF PWR]

■ Transmission via

microphone

When transmitting with a microphone, push [PTT] and

speak into the microphone at a normal voice level.

To maximize the readability of your transmitted sig-

nal (voice), pause a few sec. after pushing [PTT]. Do

not hold the microphone too close to your mouth.

Microphone gain

Rotate [MIC GAIN] clockwise to increase, counter-

clockwise to decrease the microphone gain.

9–12 o’clock position is recommended for [MIC GAIN].

[PTT] switch

HM-12

■ Indications during transmit

Transmit indicator

The MAIN band indicator lights red while transmitting.

However, the SUB band indicator lights red during

satellite operation.

RF power indicator

The S-meter for the MAIN band is used as the RF

power indicator to indicate the relative output power

level. However, the S-meter for the SUB band is used

as the RF power indicator during satellite operation.

Time-out timer

The time-out timer limits the continuously transmittable

time period, and is selectable from 3, 5, 10, 20, 30 min.

and OFF in TRANSMIT set mode. (p. 66)

PTT lock function

Deactivate [PTT] and [TRANSMIT] switches. The func-

tion can be switched ON and OFF in TRANSMIT set

mode. (p. 66)

S-meter while receiving

RF power indicator while transmitting

VFO A

VFVF

S 1 3

9 2020

4040

60dB60dB

60dB

OVER

3 5

OVEROVER

RECEIVE AND TRANSMIT

■ FM mode operation

q Push [M/S•BAND] to select the desired band.

w Push [FM] to select FM mode.

•“FM” indicator appears.

•Push [FM] again to select repeater operation after FM

mode selection. “DUP–” and “T” indicators appear.

•Push [FM] for 1 sec. to select FM narrow mode after FM

mode selection. “FMN” indicator appears.

e Rotate the tuning dial to set the desired frequency.

r Push [PTT] to transmit.

• The MAIN band indicator lights red.

t Speak into the microphone at a normal voice level.

•Setting the [MIC GAIN] control to 10–12 o’clock is rec-

ommended.

y Release [PTT] to receive.

Tuning dial

[FM][M/S•BAND][TRANSMIT]

[MIC GAIN]

■ VOX operation (for SSB and FM)

The VOX (Voice-operated Transmission) function

switches between transmit and receive with your voice.

This function provides an opportunity to input log en-

tries into your computer, etc., while operating.

q Push [M/S•BAND] to select the desired band.

w Push either [SSB/CW] or [FM] to select phone

mode (USB, LSB or FM).

e Push [VOX] to switch the VOX function ON and

OFF.

•“VOX” indicator appears while the VOX function is acti-

vated.

Adjusting the VOX gain

q Push [SET] then [VOX] to enter the VOX set mode.

w Push [DN ▼] or [▼ UP] to select the VOX gain item.

•“GAIn” is displayed.

e Rotate the tuning dial to adjust the VOX gain while

speaking into the microphone at a normal voice

level, until the transceiver begins transmitting.

•With too sensitive a setting, the transceiver may trans-

mit with other than your voice, such as noise, receiving

signal, etc.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [VOX] to exit VOX set mode.

Adjusting the anti-VOX gain

q Push [SET] then [VOX] to enter the VOX set mode.

w Push [DN ▼] or [▲ UP] to select anti-VOX gain

item.

•“Anti” is displayed.

e Rotate the tuning dial to adjust the anti-VOX gain

while receiving a signal with a suitable audio output

level, to the point where the transceiver does not

transmit with the audio output from the speaker.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [VOX] to exit VOX set mode.

Adjusting the VOX delay

q Push [SET] then [VOX] to enter the VOX set mode.

w Push [DN ▼] or [▲ UP] to select the VOX delay

item.

•“dELAy” is displayed.

e Rotate the tuning dial to adjust the VOX delay time

while speaking into the microphone at a normal

speed, to a convenient interval before returning to

receive.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [VOX] to exit VOX set mode.

RECEIVE AND TRANSMIT

■ Repeater operation

A repeater ampliﬁes received signals and re-transmits

them at a different frequency. When using a repeater,

the transmit frequency is shifted from the receive fre-

quency by an offset frequency.

Setting the auto repeater range

(U.S.A. and Korea versions only)

The auto repeater function automatically turns ON the

duplex operation with speciﬁed shift direction and tone

encoder when the operating frequency is set in the de-

sired frequency range. To activate the auto repeater

function, the following operations are necessary.

q Set one edge frequency of the desired frequency

range.

• Push [M/S•BAND] to select the desired band if required.

• Push [FM] to select FM mode if required.

w Set the desired repeater conditions.

• Both one-touch repeater and manual repeater setting

are acceptable.

e Push [DN ▼] or [▲ UP] to select the memory chan-

nel 1.

• The memory channel 3 or 5 is also acceptable.

r Push [MW 4] for 1 sec. to program the contents into

the memory.

• 3 beep tones may sound.

t Set the other side edge frequency of the desired

frequency range.

y Push [▲ UP] to select the memory channel 2.

• Select memory channel 4 or 6, respectively if the mem-

ory channel 3 or 5 is selected in step e.

u Push [MW 4] for 1 sec. to program the contents into

the memory.

i Repeat steps q to u to program other ranges.

o Push [POWER] for 1 sec. to turn the power OFF

once, then push [POWER] to turn the power ON

while pushing and holding [FM] and [TONE].

• The memory channels can be used for normal operation

after programming.

!0 Push [SET] then [FM] to enter the FM set mode.

!1 Push [DN ▼] or [▲ UP] to select auto repeater item.

•“AutorPt” is displayed.

!2 Rotate the tuning dial to turn the auto repeater func-

tion ON.

U.S.A. version:

•“on1” Activates duplex only.

•“on2” Activates duplex and tone.

•“oFF” Auto repeater function is turned OFF.

Korea version:

•“ON” Activates duplex and tone.

•“OFF” Auto repeater function is turned OFF.

!3 Push [FM] to exit from the FM set mode.

NOTE: All repeater ranges for available bands must

be programmed at the same time. Otherwise, the

previously programmed ranges will be lost.

Frequency range and shift direction

• U.S.A. version

• Korea version

FREQUENCY RANGE SHIFT DIRECTION

1439.0000–1440.0000 MHz “DUP–” appears

1290.0000–1293.0000 MHz “DUP–” appears

FREQUENCY RANGE SHIFT DIRECTION

1145.2000–1145.4999 MHz

1146.6100–1146.9999 MHz

“DUP–” appears

1147.0000–1147.3999 MHz “DUP+” appears

1442.0000–1444.9999 MHz “DUP+” appears

1447.0000–1449.9999 MHz “DUP–” appears

1282.0000–1295.9999 MHz “DUP–” appears

Setting the shift direction for the one-touch repeater function

(except Europe, Sweden and Italy versions)

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [SET] then [FM] to enter the FM set mode.

e Push [DN ▼] or [▲ UP] to select shift direction item.

•“o_touch” and “rPt” are displayed.

r Rotate the tuning dial to select the desired direction.

•“DUP–” or “DUP+” is selectable.

t Push [FM] to exit from the FM set mode.

RECEIVE AND TRANSMIT

Using the one-touch repeater function

(except Europe, Sweden and Italy versions)

By using the pre-programmed offset frequency, shift di-

rection and tone frequency, quick and simple repeater

operation can be made.

The default values for offset frequency and direction

are as follows:

144 MHz band : –0.600 MHz

430(440) MHz band : –5.000 MHz

1200 MHz band : –20.000 MHz (optional)

Tone frequency : 88.5 Hz

q Push [M/S•BAND] to select the desired frequency

band.

w Push [FM] to select FM mode.

e Rotate the tuning dial to input the desired repeater

frequency.

•Direct frequency input using the keypad can be used for

frequency setting.

r Push [FM] to select the repeater operation mode.

•“DUP–” and “T” indicators appear.

t Push [PTT] to access the repeater.

y Release [PTT] to receive a signal from the repeater.

u Push [FM] to cancel the duplex operation mode.

•“DUP–” and “T” indicators disappear.

VFO A

DUP

VFO A

60dB

3 5

Shifts 5 MHz when transmitted.

DUP

VFO A

Setting tone frequency

(except Europe, Sweden and Italy versions)

q Push [M/S•BAND] to select the desired frequency

band.

w Push [SET] then [FM] to enter the FM set mode.

e Push [DN ▼] or [▲ UP] to select the tone frequency

item.

•“ton,” selected band (144/430(440)/1200) and “T” indi-

cator appear.

r Rotate the tuning dial to set the desired tone fre-

quency.

t Push [FM] to exit from the FM set mode.

Setting offset frequency

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [SET] then [FM] to enter the FM set mode.

e Push [DN ▼] or [▲ UP] to select the offset frequency

item.

•“duP” and selected band (144/430(440)/1200) appear.

r Rotate the tuning dial to set the desired tone fre-

quency.

t Push [FM] to exit from the FM set mode.

Manual repeater setting

q Set the desired frequency.

•Push [M/S•BAND] to select the desired band if required.

• Push [FM] to select FM mode if required.

w Push [SPLIT•DUP] for 1 sec. to select the duplex

operation and the shift direction.

•“DUP–” or “DUP+” indicator appears, depending on the

selection.

• Set the offset frequency in the FM set mode, if required.

e Push [TONE] to activate the tone encoder.

•“T” indicator appears.

•Set the tone frequency in the FM set mode, if required

for non-European versions..

•1750 Hz tone is transmitted for Europe, Sweden and

Italy versions.

r Push [SPLIT•DUP] for 1 sec. and [TONE] to cancel

the duplex operation and deactivate the tone en-

coder.

•“DUP–” or “DUP+” and “T” indicators disappear.

RECEIVE AND TRANSMIT

■ SSB mode operation

q Push [M/S•BAND] to select the desired frequency

band.

w Push [SSB/CW] to select USB or LSB mode.

•Push [SSB/CW] for 1 sec. to switch between USB and

LSB when either the USB or LSB has been selected.

e Rotate the tuning dial to set the desired frequency.

r Push [PTT] to transmit and speak into the micro-

phone at a normal voice level.

t Rotate [MIC GAIN] so that the MAIN band indicator

periodically lights red brightly.

• The brightness increases when the ALC is activated.

y Release [PTT] to receive.

Tuning dial

[SSB/CW][M/S•BAND][TRANSMIT]

[MIC GAIN]

■ Speech compressor

The speech compressor increases average RF output

power, improving signal strength and readability in

SSB. The IC-910H has a built-in, low-distortion speech

compressor circuit.

➥ Push [COMP] to turn the speech compressor ON

and OFF.

• Either USB or LSB should be selected.

•“COMP” indicator appears when the speech compres-

sor is activated.

Compression level setting

q Select USB or LSB mode.

w Preset the transceiver as follows:

[COMP] function : OFF

[RF POWER] control : Max. counterclockwise

e Transmit at your normal voice level.

r Adjust the [MIC GAIN] control so that the MAIN

band indicator periodically lights red brightly

whether or not you speak softly or loudly.

t Push [COMP] to turn the speech compressor ON.

y Push [SET] then [COMP] to enter the COMP set

mode.

u Rotate the tuning dial to adjust the compression

level to the point where the maximum value and the

MAIN band indicator brightness does not increase,

whether or not you speak softly or loudly.

•When the MAIN band indicator continuously lights red

with increased brightness, your transmitted voice may

be distorted.

•It’s a good idea to adjust the compressor level by moni-

toring with an other transceiver or receiver, if you have

one, or with an other station.

i Push [COMP] to exit the COMP set mode.

[MIC GAIN]

[COMP]

MAIN band LED

lights in red while transmitting.

ALC indicator

While transmitting, the MAIN/SUB band indicator

shows the ALC condition. Brightness increases

more than usual when the ALC function is activated.

VOX function

The VOX (Voice-operated Transmission) function is

available for switching between transmit and receive

with your voice. See p. 33 for details.

RECEIVE AND TRANSMIT

■ Split frequency operation

Split frequency operation allows you to transmit and

receive on two different frequencies in the same fre-

quency band. Split frequency operation uses 2 fre-

quencies, one in VFO A and the other in VFO B.

q Set a receive frequency in VFO mode.

• Either VFO A or VFO B can be used.

w Push [A=B 2] for 1 sec.

•The undisplayed VFO contents are cleared and equal-

ized to the displayed frequency.

e To change the receive frequency, rotate the tuning

dial.

r To replace the transmit and receive frequencies,

push [A/B 3].

t To change the transmit frequency, rotate the tuning

dial while pushing [CHECK 7].

y Push [SPLIT].

•“SPLIT” indicator appears.

•Now you can receive on the displayed VFO and transmit

on the undisplayed VFO.

• To monitor the transmit frequency, push [CHECK 7].

u Push [SPLIT] to cancel the split frequency opera-

tion.

•“SPLIT” indicator disappears.

Cross mode communication can be performed using

the split function. (e.g. USB and CW)

[A=B 2]

[A/B 3]

[SPLIT]

[TRANSMIT]

USBUSB

SPLITSPLIT

VFO B

USBUSB

VFO B

USBUSB

VFO A

■ Full duplex operation

The MAIN and SUB bands are activated indepen-

dently, therefore, simultaneous transmission and re-

ception in different frequency bands are possible.

q Push [M/S•BAND] to select the desired frequency

band for transmission.

•Push [V/M 1] to select VFO or memory mode, if desired.

•Push [SSB/CW] or [FM] to select the desired operating

mode.

w Rotate the tuning dial to set the desired frequency.

•Direct frequency input from the keypad is also available.

e Push [SUB] to enable the SUB band access.

•Push [M/S•BAND] for 1 sec. to select the desired fre-

quency band, if desired. (when the optional UX-910 is

installed.)

•Push [V/M 1] to select VFO or memory mode, if desired.

•Push [SSB/CW] or [FM] to select the desired operating

mode.

r Push [PTT] to transmit.

• SUB band mute function

The SUB band mute function mutes receiving audio

from the SUB band while transmitting.

q Push [SET] then [TRANSMIT] to enter the TRANS-

MIT set mode.

w Push [DN ▼] or [▲ UP] to select the SUB band

mute item.

•“Audio” is displayed.

e Rotate the tuning dial to turn the SUB band mute

function ON and OFF.

•Push [M-CL 5] for 1 sec. to return to the default setting.

r Push [TRANSMIT] to exit from the TRANSMIT set

mode.

RECEIVE AND TRANSMIT

■ Connections for CW

Before operating in CW, select the paddle type using

the SSB/CW set mode.

q Push [SSB/CW] to select CW mode.

•“CW” indicator appears.

w Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

e Push [DN ▼] or [▲ UP] to select the paddle type

item.

•“PAddLE” is displayed.

r Rotate the tuning dial to select the paddle type.

• Push [M-CL 5] for 1 sec. to return to the default setting.

t Push [SSB/CW] to exit the SSB/CW set mode.

■ CW mode operation

q Connect a paddle or straight key as above.

w Push [M/S•BAND] to select the desired frequency

band.

e Push [SSB/CW] to select CW mode.

• Push [SSB/CW] for 1 sec. to select CW narrow mode

after the CW mode selection when the optional CW nar-

row filter, FL-132 (for MAIN band) or FL-133 (for SUB

band), is installed.

r Rotate the tuning dial to set the operating fre-

quency.

t Push [TRANSMIT] to set the transceiver to transmit

mode.

• The MAIN band indicator lights red.

y Operate the paddle or key to transmit the CW sig-

nal.

u Push [TRANSMIT] to return to receive mode.

Tuning dial

[SSB/CW][M/S•BAND][TRANSMIT]

Paddle

Straight key

Microphone

[KEY] jack

[MIC] connector

CW paddle with normal polarity (default)

CW paddle with reverse polarity

CW paddle use as bug-key

Electronic keyer OFF (straight key)

Substitute paddle function

(microphone [UP]/[DN])

NOTE: A stereo plug must be used even when a

straight key is used. See page 12 or 15.

NOTE: [UP]/[DN] keying does not function while

pushing [PTT] on the microphone. Push [TRANS-

MIT] on the front panel or use the semi break-in

function in this case.

RECEIVE AND TRANSMIT

Setting keying speed

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the keying speed

item.

•“SPEEd” is displayed.

e Rotate the tuning dial to adjust the keying speed to

the desired speed.

• Keying speed can be selected from 6–60 wpm.

•Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

Setting semi break-in function

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the semi break-in

item.

•“br-In” is displayed.

e Rotate the tuning dial to turn the semi break-in func-

tion ON and OFF.

•Push [M-CL 5] for 1 sec. to return to the default setting.

r Push [DN ▼] or [▲ UP] to select the delay time item.

•“dELAy” is displayed.

t Rotate the tuning dial to set the delay time to the

desired time period.

•Delay time can be selected from 2.0–13.0 sec. in

0.1 sec. steps.

• Push [M-CL 5] for 1 sec. to return to the default value.

y Push [SSB/CW] to exit the SSB/CW set mode.

Setting keying weight

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the keying weight

item.

•“rAtio” is displayed.

e Rotate the tuning dial to adjust the keying weight

ratio to the desired level.

•Keying weight ratio can be selected from 1:1:2.8 to

1:1:4.5.

•Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

Setting CW pitch

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the CW pitch item.

•“Pitch” is displayed.

e Rotate the tuning dial to adjust the CW pitch to the

desired pitch.

• CW pitch can be adjusted within 300–900 Hz range.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

Setting side tone

q Push [SET] then [SSB/CW] to enter the SSB/CW

set mode.

w Push [DN ▼] or [▲ UP] to select the side tone item.

•“SidE-t” is displayed.

e Rotate the tuning dial to adjust the side tone level

to the desired level.

• Push [M-CL 5] for 1 sec. to return to the default value.

r Push [SSB/CW] to exit the SSB/CW set mode.

KEYING WEIGHT EXAMPLE: Morse code “K”

DASH

Weight setting:

1:1:3 (default)

Weight setting:

Adjusted

DASH

DOT

(Fixed*)

Adjustable range SPACE (Fixed*)

*SPACE and DOT length can be adjusted with the

keying speed only.

MEMORY OPERATION

■ Memory channels

The IC-910H has 106 memory channels (99 for regu-

lar, 6 scan edges and 1 call) and they are equipped for

each frequency band for storing the most often used

frequencies and operating mode, as well as tone fre-

quency, offset frequency, etc.

■ Operation on a memory

channel

Frequency and mode, etc., can be changed in a mem-

ory channel. However, they will be cleared if [MW 4] is

not pushed.

Memory channel selection

q Push [V/M 1] to select memory channel mode.

•“MEMO” indicator appears.

w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel.

• Memory channel changes continuously while holding

[DN ▼] or [▲ UP].

• The tuning dial rotation while pushing [F-INP ENT] also

selects memory channel.

e Push [V/M 1] to return to VFO mode.

During VFO mode operation

By pushing [DN▼] or [▲ UP] during VFO mode opera-

tion, memory channel is also selectable. However, the

frequency readout does not change in this case, only

the memory channel number changes.

VFO A

MEMO

USBUSB

Select memory mode

Select memory

channel

[UP ∫][DN √]

Memory

Channel

1–99

1A/1b–3A/3b

Description

Regular memory channels. Programs op-

erating frequency, mode, subaudible tone

activity with frequency and split/duplex

conditions.

Scan edge channels. Programs edge fre-

quencies for programmed scan.

Call channel recalls a specified fre-

quency on the instant. Programs operat-

ing frequency, mode, etc., and is avail-

able for each band, independently.

MEMORY OPERATION

■ Programming in VFO mode

Memory channel programming can be performed ei-

ther in VFO mode or in memory mode.

q Set the desired operating frequency and mode in

VFO mode.

• Push [V/M 1] to select VFO mode, if required.

•Tone frequency, offset frequency, etc., can also be pro-

grammed.

•Input the frequency from the keypad

Push [F-INP ENT] ⇒ [1] ⇒ [4] ⇒ [4] ⇒ [.] ⇒ [2] ⇒ [6]

⇒ [8] ⇒ [F-INP ENT]

w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel to be programmed.

e Push [MW 4] for 1 sec. to program the displayed

frequency and operating mode into the memory

channel.

To check the programmed contents, push [V/M 1] to

select memory mode.

VFO A

USBUSB

VFO A

USBUSB

VFO A

Select desired memory

channel.

Beep tones sound.

Set desired frequency

and mode.

■ Programming in memory

mode

q Push [V/M 1] to select memory mode.

w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel to be programmed.

•The tuning dial rotation while pushing [F-INP ENT] also

selects memory channel.

e Set the desired operating frequency and mode in

the memory mode.

•Tone frequency, offset frequency, etc., can also be pro-

grammed.

•Set the desired operating frequency using with the key-

pad when programming into blank channels. The tuning

dial rotation for frequency setting cannot be performed

when a blank channel is selected.

•Input the frequency from the keypad

Push [F-INP ENT] ⇒ [1] ⇒ [4] ⇒ [4] ⇒ [.] ⇒ [1] ⇒ [6]

⇒ [4] ⇒ [F-INP ENT]

r Push [MW 4] for 1 sec. to program the displayed

frequency and operating mode into the memory

channel.

MEMO

USBUSB

MEMO

USBUSB

MEMO

USBUSB

Set desired frequency

and mode.

Beep tones sound.

Select desired memory

channel.

MEMORY OPERATION

■ Blank channels

Memory channels 6–99 are blank channels by factory

default. They have no contents programmed.

When a blank channel is selected, the “BLANK” indi-

cator appears and the frequency band is displayed

2 sec. after the selection.

Programming a blank channel

q Push [V/M 1] to select VFO mode.

w Set the desired operating frequency, mode, etc.

e Push [MW 4] for 1 sec. to program the memory

channel.

•“BLANK” indicator disappears.

MEMO

ANAN

MEMO

ANAN

Operating band appears

after 2 sec.

“--430-” appears while in 430 MHz band.

“-1200-” appears while in 1200 MHz band.

■ Frequency transferring

The frequency and operating mode in a memory chan-

nel can be transferred to the VFO.

Frequency transferring can be performed in either VFO

mode or memory mode.

Transferring in memory mode

This is useful for transferring frequency and operating

mode while operating in memory mode.

When you have changed the frequency or operat-

ing mode in the selected memory channel:

• Displayed frequency and mode are transferred.

•Programmed frequency and mode in the memory

channel are not transferred, and they remain in the

memory channel.

q Push [DN ▼] or [▲ UP] to select the memory chan-

nel to be transferred in memory mode.

• And, set the frequency or operating mode if required.

w Push [M≈V 6] for 1 sec. to transfer the frequency

and operating mode.

• Displayed frequency and operating mode are transferred

to the VFO.

e Push [V/M 1] to return to VFO mode.

Transferring in VFO mode

This is useful for transferring programmed contents to

VFO.

q Push [V/M 1] to select VFO mode.

w Push [DN ▼] or [▲ UP] to select the memory chan-

nel to be transferred.

•“BLANK” appears if the selected memory channel is a

blank channel. In this case transferring is impossible.

e Push [M≈V 6] for 1 sec. to transfer the frequency

and operating mode.

•Transferred frequency and operating mode appear on

the frequency readout.

MEMO

USBUSB

MEMO

USBUSB

VFO A

Beep tone sounds.

Select VFO mode.

MEMORY OPERATION

■ Memory clearing

Any unnecessary memory channels can be cleared.

The cleared memory channels become blank chan-

nels.

q Push [V/M 1] to select memory mode.

w Push [DN ▼] or [▲ UP] to select the desired mem-

ory channel to be cleared.

e Push [M-CL 5] for 1 sec. to clear the contents.

•The programmed frequency and operating mode disap-

pear.

•“BLANK” indicator appears.

r To clear other memory channels, repeat steps w

and e.

MEMO

USBUSB

MEMO

ANAN

Operating band appears

after 2 sec.

MEMO

ANAN

Beep tone sounds.

■ Call channel

The call channel is a one-touch accessible channel for

recalling your most-often-used frequency. The IC-910H

has one call channel for each frequency band.

Call up a call channel

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [CALL] to select the call channel.

e Push [CALL] or [V/M 1] to return to previous display.

Call channel programming

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [CALL] to select the call channel.

e Enter the desired frequency using the keypad.

e.g.; When programming 145.8200 MHz.

Push [F-INP ENT] ⇒ [1] ⇒ [4] ⇒ [5] ⇒ [.] ⇒ [8] ⇒

[2] ⇒ [F-INP ENT]

• Select operating mode if required.

r Push [MW 4] for 1 sec. to program the call channel.

Transferring call channel contents

q Push [M/S•BAND] or [SUB] to select the desired

frequency band.

w Push [CALL] to select the call channel.

e Push [M≈V 6] for 1 sec. to transfer the call channel

contents.

USBUSB

VFO A

ANAN

MEMORY OPERATION

■ Memo pads

The IC-910H has a memo pad function for each fre-

quency band to store frequency and operating mode

for easy write and recall. The memo pads are separate

from memory channels.

The default number of memo pads is 5, however, this

can be increased to 10 in the memo pad set mode

(p. 64) if desired.

Memo pads are convenient when you want to memo-

rize a frequency and operating mode temporarily, such

as when you ﬁnd a DX station in a pile-up, or when a

desired station is busy for a long time and you want to

temporarily search for other stations.

Use the transceiver’s memo pads instead of relying on

hastily scribbled notes that are easily misplaced.

Writing frequencies and operating

modes into memo pads

You can simply store the accessed readout frequency

and operating mode by pushing [MPW 8].

When you write a 6th (or 11th) frequency and operat-

ing mode, the oldest written frequency and operating

mode are automatically erased to make room for the

new settings.

Each memo pad must have its own unique combi-

nation of frequency and operating mode; memo

pads having identical settings cannot be written.

Calling up a frequency from a memo pad

You can simply call up the desired frequency and op-

erating mode of a memo pad by pushing [MPR 9].

• Both VFO and memory modes can be used.

• The frequency and operating mode are called up, starting

from the most recently written.

USB

VFO A

VFO or memory mode Memo pad contents

USB

VFO or memory mode Memo pad contents

When [MPW 8] is pushed, “FM 145.9200 MHz”

is programmed and the oldest memo pad is

cleared.

Cleared

VFO A

SCANS

■ Scan types

Scanning searches for signals automatically and

makes it easier to locate new stations for contact or lis-

tening purposes. The IC-910H has several scan types;

programmed scan, memory scan and mode select

scan.

The scanning operation can be performed indepen-

dently for MAIN and SUB band. And to search a sub-

audible tone frequency for a repeater frequency, a tone

scan is also available.

■ Preparation

• Squelch condition

Set the [RF/SQL] control as for regular operation.

• When receiving a signal

•Scan pauses for 10 sec. when receiving a signal, then

resumes.

•When a signal disappears while scan is paused, scan

resumes approx. 3 sec. later.

• Scan resume ON/OFF

You can select the scan to resume or cancel when re-

ceiving a signal, in the scan set mode. Scan resume

ON/OFF must be set before operating a scan. See de-

tails described at right for ON/OFF setting.

• Scan start/stop operation

Push [SCAN .] to start and cancel scanning.

• Scan speed

Scan speed can be selected from 2 levels, high (de-

fault) or low, in the scan set mode. See details de-

scribed at right.

• Setting scan resume condition

q Push [SET] then [SCAN .] to enter the scan set

mode.

w Push [DN ▼] or [▲ UP] to select the scan resume

item.

•“SC-rES” is displayed.

e Rotate the tuning dial to select scan resume condi-

tion from ON and OFF.

•“ON”: scan resumes, “oFF”: scan cancels

• Push [M-CL-5] for 1 sec. to return to the default setting.

r Push [SCAN .] to exit from the scan set mode.

• Setting scan speed

q Push [SET] then [SCAN .] to enter the scan set

mode.

w Push [DN ▼] or [▲ UP] to select the scan speed

item.

•“SC-SPd” is displayed.

e Rotate the tuning dial to select scan resume condi-

tion from HI and Lo.

• Push [M-CL-5] for 1 sec. to return to the default setting.

r Push [SCAN .] to exit from the scan set mode.

MEMORY SCAN

Repeatedly scans all programmed memory channels.

This scan operates in memory mode.

M-CH 1

M-CH 5

M-CH 2 M-CH 3 M-CH 4

M-CH 6

M-CH 7

M-CH 99

Call channels and scan edge channels are not scanned.

Blank

PROGRAMMED SCAN

Repeatedly scans between two scan edge frequencies

(scan edge memory channels 1A/2A/3A and 1b/2b/3b).

This scan operates in VFO mode.

Scan starts from the displayed frequency or the lower

scan edge frequency.

Scan

Scan edge

(1A/2A/3A)

Scan edge

(1b/2b/3b)

Jump

MODE SELECT SCAN

Repeatedly scans all selected mode memory channels.

This scan operates in memory mode.

FM FM

USB

USBFM

SCANS

■ Programmed scan operation

Scans speciﬁed frequency range, programmed in the

memory channel 1A/1b, 2A/2b and 3A/3b. Before start-

ing the programmed scan, scan edges should be pro-

grammed in these channels.

Selecting scanning range

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [SET] then [SCAN .] to enter the scan set

mode.

e Push [DN ▼ ] or [▲ UP] to select the programmed

scan item.

•“P-SCAn” is displayed.

r Rotate the tuning dial to select the desired scanning

range from 1A-1b, 2A-2b and 3A-3b.

• Push [M-CL 5] for 1 sec. to return to the default setting.

t Push [SCAN .] to exit from the scan set mode.

Starting the programmed scan

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [V/M 1] to select VFO mode.

e Select the desired operating mode.

•The operating mode can also be changed while scan-

ning.

r Push [SCAN .] to start the programmed scan.

•“SCAN” indicator ﬂashes.

• The tuning step setting is used for the scanning step.

•1 kHz or 1 MHz tuning step can also be used as the

scanning step.

t Push [SCAN .] to cancel the scan.

If the same frequency is programmed into the scan

edge memory channel 1A and 1b, 2A and 2b or 3A

and 3b, programmed scan does not start.

VFO A

60dB

3 5

Flashes while scanning

wSelect

mode.

qSelect VFO

mode.

eStart.

rStop.

■ Memory scan operation

Scans programmed memory channels only. Blank

channels and programmed scan edge channels

(1A/1b, 2A/2b and 3A/3b) are not scanned.

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [V/M 1] to select memory mode.

e Push [SCAN .] to start the memory scan.

•“SCAN” indicator ﬂashes.

• Pushing [SPCH•LOCK] for 1 sec. during scan starts

mode select scan and “LOCK” indicator appears. (p. 47)

r Push [SCAN .] to cancel the scan.

MEMO

USB

LSB

TT P.AMP

AFC

AGC

60dB

3 5

Flashes while scanning

qSelect memory

mode.

wStart.

eStop.

SCANS

■ Mode select scan

Scans the memory channels, desired operating mode

is programmed, only.

q Push [M/S•BAND] or [SUB] to select the desired

frequency band to be scanned.

w Push [V/M 1] to select memory mode.

e Push [SSB/CW] or [FM] to select the desired oper-

ating mode to be scanned.

• The operating mode can also be changed during scan.

r Push [SPCH•LOCK] for 1 sec.

•“LOCK” indicator appears.

t Push [SCAN .] to start the mode select scan.

•“SCAN” indicator ﬂashes.

y Push [SCAN .] to cancel the scan.

MEMO

USBUSB

VFVF

OCK

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Flashes while scanning

wSelect

mode.

qSelect memory

mode.

e appears. rStart.

tStop.

LOCK

■ Tone scan

The transceiver can detect a subaudible tone fre-

quency in a received signal. By monitoring a signal that

is being transmitted on a repeater input frequency, you

can determine the tone frequency required to access

the repeater.

q Set the desired frequency or memory channel to be

checked for a tone frequency.

w Push [FM] to select FM mode.

e Push [TONE] or [CALL•T-SQL] for 1 sec. to activate

the subaudible tone.

•“T” or “T-SQL” indicator appears.

r Push [SCAN .] for 1 sec. to start the tone scan.

•“SCAN” indicator ﬂashes while scanning.

•Scan stops when a subaudible tone is detected.

•Scan becomes slower or quicker, respectively when the

noise squelch is open or closed.

t Push [SCAN .] for 1 sec. to cancel the scan.

NOTE: The tone scan automatically changes tone

frequency setting to the detected tone frequency.

VFO A

60dB

3 5

Flashes while scanning

qSelect FM mode.

wStart.

eStop.

435 MHz

band

435 MHz

band

145 MHz band

145 MHz

band

FUJI 3 (FO-29)

Uplink

Downlink

SATELLITE OPERATION

■ Satellite communications outline

Both satellite mode B (435 MHz uplink, 145 MHz

downlink) and mode J (145 MHz uplink, 435 MHz

downlink) can be operated from the IC-910H, and

mode L can be operated when the optional UX-910

1200 MHz BAND UNIT is installed.

Satellite communications is possible only when a satel-

lite is in view and its transponder is activated.

■ Satellite notes

1. NEVER set the output power too high. Too much

power will shorten the satellite’s life.

Set your transmit power so that your downlink sig-

nal level is lower than the beacon’s signal level.

2. Confirm a satellite’s operating mode in advance

through documentation (magazines, etc.) or via ap-

propriate satellite tracking software. In the wrong

mode, you cannot use the satellite even if you re-

ceive its beacon signal.

3. Preampliﬁers may be necessary to receive satellite

signals. Optional AG-25, AG-35 and AG-1200 (for

UX-910) are available to use with the IC-910H.

(p. 16)

4. When you use a reverse tracking satellite in SSB

mode, use the LSB for the uplink frequency and

USB for the downlink frequency.

•When using a normal tracking satellite in SSB mode,

use USB for both the uplink and downlink frequencies.

■ Entering into the satellite

mode

Operating frequencies in satellite mode can be set

both before and after entering into the satellite mode.

Normal and reverse tracking are available.

Transferring the VFO frequency to the

satellite VFO

q Set the downlink frequency (receive) in the MAIN

band.

w Set the uplink frequency (transmit) in the SUB band.

e Push [SATELLITE] for 1 sec. to transfer the fre-

quencies, set in steps q and w , into the satellite

VFO.

•Satellite mode is automatically selected after transfer-

ring.

•“SATL” indicator with either “NOR” or “REV” indicator ap-

pears.

•VFO and memory mode indications are displayed in the

SUB band (lower area) during satellite mode.

[SATELLITE] for 1 sec.

•Mode B operating diagram

[Example]: FUJI 3 (FO-29), Mode B

• Uplink frequency:

145.9000–146.0000MHz

• Downlink frequency:

435.8000–435.9000 MHz

• Tracking direction:

Reverse

• CW beacon frequency:

435.7950 MHz

Orbit information

Orbit information describes satellite location, reach-

ing angles, etc. This information may be available in

ham magazines or organization issues, such as from

ARRL, RSGB handbook, etc.

Appropriate satellite tracking software is also conve-

nient.

SATELLITE OPERATION

■ Setting the satellite VFO

q Push [SATELLITE] to enter the satellite mode.

•“SATL” indicator with either “NOR” or “REV” indicator ap-

pears.

w Push [V/M 1] to toggle satellite VFO and memory

mode.

•VFO or memory mode indicator is displayed in the SUB

band (lower area).

e Push [SCAN . M] to enable the downlink frequency

tuning.

• Uplink frequency indication disappears.

•Rotate the tuning dial to set the downlink frequency and

push [SSB/CW] to select the operating mode.

• Push [SCAN .

M] again after the tuning.

r Push [SWP 0 S ] to enable the uplink frequency

tuning.

• Downlink frequency indication disappears.

• Push [SWP 0 S] again after the tuning.

NOTE: To select the operating mode for the uplink,

push [SUB] to enable the SUB band access.

USBUSB

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

USBUSB

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

■ Tracking selection

•Push [F-INP ENT ] for 1 sec. to switch be-

tween normal and reverse tracking.

Normal tracking

Both downlink and uplink frequencies increase or de-

crease in the same step simultaneously by tuning dial

rotation.

Reverse tracking

The downlink frequency follows the tuning dial rotation,

however, the uplink frequency changes in the reverse

direction to the tuning dial rotation in the same step.

USBUSB

NOR

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Satellite mode indication

Varies simultaneously

[SATELLITE]

[F-INP ENT]

NOR ↔ REV

SATELLITE OPERATION

■ Satellite operation

When your own signal can be received with a loop

test, satellite communication can be performed.

q Rotate the tuning dial to re-tune the uplink fre-

quency after pushing [SWP 0 S], when shifting a

frequency with the Doppler effect.

•The downlink frequency readout (MAIN band) disap-

pears.

w Rotate the tuning dial to re-tune the downlink fre-

quency after pushing [SCAN . S], when the oper-

ating station’s signal frequency is shifted.

•RIT function can also be used for downlink frequency

tuning within ±1 kHz range.

■ Satellite memory

The IC-910H has 10 satellite memory channels to

memorize both uplink and downlink frequencies and

operating modes, etc.

Satellite memory selection

q Push [SATELLITE] to enter the satellite mode.

w Push [V/M 1] to select satellite memory mode.

•“MEMO” indicator and memory channel number are dis-

played beside the uplink frequency (SUB band) indica-

tion.

• Push [V/M 1] again to select satellite VFO.

e Push [DN ▼] or [▲ UP] to select the desired satel-

lite mode memory channel.

• The channels 00–09 are selectable.

•By pushing and holding either switch, the satellite mem-

ory channel changes continuously.

Satellite memory programming

q Select the desired satellite memory channel.

• Push [SATELLITE] to enter the satellite mode.

• Push [V/M 1] to select satellite VFO mode.

•Push [DN ▼] or [▲ UP] to select the desired satellite

mode memory channel.

w Set the desired downlink frequency to the MAIN

band and uplink frequency to the SUB band, as well

as operating mode.

•Push [SCAN . M] for downlink tuning, push [SWP 0 S]

for uplink frequency tuning.

•Push [SUB] before the operating mode selection when

selecting operating mode for the uplink.

e Push [MW 4] for 1 sec. to program the set contents

to the satellite memory channel.

• 3 beep tones sound.

NOTE: Tracking selection, normal or reverse, is not

programmed in the satellite memory channels.

USBUSB

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Select the desired

satellite memory

USBUSB

NOR

S 1 3

9 2020

4040

60dB60dB

60dB

3 5

Satellite memory

indication

DATA COMMUNICATION

■ Connections for AFSK

Connections via [DATA] socket

Use FM mode for 9600 bps operation.

Use SSB or FM mode for 1200 bps operation.

Connections via [ACC(1)] socket or [MIC] connector

Use FM mode for 9600 bps operation.

Use SSB or FM mode for 1200 bps operation.

DATA IN

SQL*

PTT

RX AUDIO

GND

TX AUDIO

TNC

GND

PTT

DATA OUT

Shielding cable

DATA IN

SQL*

PTT

RX AUDIO

GND

TX AUDIO

TNC

GND

PTT

SQ*

AF OUT

Shielding cable

•9600 bps connection •1200 bps connection

* Connect the SQL line when required.

[DATA] socket

(Rear panel view)

[DATA] socket

(Rear panel view)

* Connect the SQL line when required.

SQ*

• Connection via [ACC(1)] connector

• Connection via [MIC] connector

TNC

(Rear panel

view)

(Front panel

view)

*Connect the SQL line when required.

†

Connect the GND line “E” to the GND

line “B” when connecting to ACC(1).

†

AFSK output

AF input

PTT

†

NOTE

GND

Squelch input

SQL*

PTT

RX AUDIO

(1200 bps)

GND

TX AUDIO

■ Functions for AFSK

The IC-910H does not have an FSK mode for RTTY,

AMTOR, PACKET, etc., however, you can operate

these using AFSK in SSB or FM mode.

The transceiver accepts data speed of up to 9600 bps.

When using 9600 bps, set the transceiver to the 9600

bps data mode using the general set mode. (p. 57)

When operating AFSK, connect external equipment to

the DATA (MAIN or SUB) or ACC socket on the rear

panel, or to the microphone connector on the front

panel as in the diagram below.

OPERATION NOTES FOR 9600 bps

• Set the transceiver to 9600 bps data mode.

- See p. 57.

•Set AFSK/GMSK output level of the terminal unit to

0.4 V p-p (0.2 V rms).

-When exceeding 0.5 V p-p (0.25 V rms), the trans-

ceiver’s modulation limiter stops modulation.

- At this time, the [RX/TX] indicator’s brightness fades.

•AF output from the transceiver is continuous and is

not cut by the squelch circuit.

■ General set mode

SET MODE

Display backlight brightness

Adjust backlight brightness for the function display to

the desired level within 0 (dark) to 100 (bright) range.

Beep tone

Adjust key touch beep output level to the desired level

within 0 (no output) to 100 (max. output) range.

RF/SQL control assignment

Assign [RF/SQL] control function from rF/SqL, Auto

and SqL.

• rF/SqL: RF gain and squelch controls are combined

for SSB/CW mode. Acts as squelch control

for FM mode.

• Auto : Acts as either an RF gain or squelch control

depending on operating mode.

• SqL : Acts as squelch control for all modes. RF

gain is set to maximum level in this setting.

Peak hold function

Turn the S-meter peak hold function ON or OFF.

The peak level is indicated for approx. 0.5 sec. when

this function is activated.

SET MODE

Microphone UP/DN speed

Select continuous changing speed with microphone’s

[UP]/[DN] operation from high and low.

Headphone audio

Switch the audio output separation capability for the

headphones ON and OFF.

• on : The MAIN and SUB band audio is sepa-

rated in right (MAIN) and left (SUB) chan-

nels when using stereo headphones.

• oFF : The MAIN and SUB band audio is mixed.

Fine tuning indication

Turn the ﬁne tuning indication (10 and 1 Hz digit indi-

cation) during the tuning dial rotation ON and OFF.

Auto TS function

Turn the auto TS function ON and OFF.

This function temporarily changes tuning step when

rotating the tuning dial quickly.

The auto TS function automatically selects a 10 or

50 Hz tuning step, when 1 or 10 Hz tuning step is

used for regular operation, respectively.

9600 bps data transmission

Turn the 9600 bps data transmission capability ON

and OFF.

• on : For 9600 bps data transmission.

• oFF : For the regular audio (or slower data) trans-

mission only.

96009600

Tuning step selection HI Lo

Below 1 kHz 50 steps/sec. 25 steps/sec.

Above 1 kHz below 1 MHz 20 steps/sec. 10 steps/sec.

1 MHz or Memory Channel

5 steps/sec. 2.5 steps/sec.

ACC socket Pin 5 and Pin 6

Select the band for output signals from the ACC

socket pins 5 (AF) and 6 (SQL) from normal and sub.

• nor : Outputs MAIN band’s signals.

• Sub : Outputs SUB band’s signals.

Icom IC-910H Handleiding

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