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VL-1000
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PERATINGPERATING
PERATINGPERATING
PERATING
M M
M M
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ANUALANUAL
ANUALANUAL
ANUAL
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD U.S.A. Inc.
6125 Phyllis Drive, Cypress, California 90630, U.S.A.
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 1306-1308, 13F., Millennium City 2, 378 Kwun Tong Road,
Kwun Tong, Kowloon, Hong Kong
VERTEX STANDARD
(
AUSTRALIA
)
PTY., LTD.
Tally Ho Business Park, 10 Wesley Court, East Burwood, VIC, 3151
Page 1VL-1000 Operating Manual
General Description
Congratulations! You are now the owner of the Yaesu VL-1000 Linear Amplifier, which brings
you leading-edge technology for the ultimate in operating convenience and reliability. We appreci-
ate your investment in Yaesu equipment, and wish you many years of satisfying operation using
your new amplifier!
The VL-1000 is an all-solid-state linear amplifier operating on the 160 through 6 meter amateur
bands (USA version: 160-15 meters) at a power output level of 1000 Watts on CW and SSB (500
Watts on continuous data modes such as RTTY). The VL-1000 includes a built-in antenna tuner
with 240 memories for tuning data, and microprocessor control of the tuning circuitry. The VL-1000
features input jacks for two different exciters, as well as four antenna jacks for connection of
antennas for different bands. Extensive self-test, system monitoring, and protection circuits are
provided, with status and tuning information being displayed on a huge Liquid Crystal Display
panel.
The separate VP-1000 Power Supply Unit provides the +48 Volts required by the PA transis-
tors, as well as all required control voltages for the amplifier. The VL-1000 normally is powered via
220 Volt AC mains, although it can be operated, at the 500 Watt level, from 117 Volt AC power.
We encourage you to read this manual thoroughly before beginning installation and operation
of your VL-1000 Linear Amplifier. The details regarding proper installation and operating advice
contained in these pages will help you derive maximum satisfaction from your new Yaesu equip-
ment. Be certain to observe all due safety precautions when using this high-power device!
Supplied Accessories
Item Quantity
ALC Cable (T9101489; 2 m) 1
Band Data Cable (T9101487A; 8-pin DIN 8-pin DIN, 2 m) 1
Control Cable (T9101491; D-sub 15-pin RCA, 2 m) 1
Page 2 VL-1000 Operating Manual
Installation
The proper, safe installation of the VL-1000
is not difficult to accomplish, using the guide-
lines to follow.
Caution!
Lethal AC and RF voltages are present
within the cabinets of the VL-1000 Lin-
ear Amplifier and VP-1000 Power Sup-
ply. Use extreme caution when open-
ing the cabinet(s) to perform any
alignment or adjustment steps, and
take particular care to inspect inter-
connection cables frequently to en-
sure that they are in good condition.
It is assumed that you possess tech-
nical knowledge and experience con-
sistent with your possession of an
amateur radio license; this knowledge
and experience are important tools
which will aid in the successful instal-
lation of this apparatus. Should you
have any questions about the safe in-
stallation of this equipment, consult
your Yaesu dealer or seek the assis-
tance of a professional installer.
AC Power Connections
(using VP-1000 Power Supply)
The VL-1000 is usually operated from 220
Volt (nominal) AC power. With 220 Volt input
to the VP-1000 Power Supply, full (1000 W)
power output will be obtained from the VL-
1000, while 117 Volt input to the VP-1000 is
possible at the 500 Watt power output level.
The advanced switching-regulator power
supply used in the matching VP-1000 Power
Supply does not require any transformer re-
wiring, nor any changing of a switch position;
the power supply will operate from either 220
or 117 Volt line voltages without configuration
changes.
However, the AC power cable/plug configu-
ration will be somewhat different, depending
on the country in which you purchased your
amplifier. In some countries, the VP-1000 is
shipped with the standard 220 Volt connector
appropriate for your location. In those areas
where there are multiple 220 Volt connectors
in common use, the VP-1000 is shipped with-
out the power connector; one may be obtained
at a local hardware or electrical supply store.
Pictorial diagrams of the common 220 and
117 Volt AC connectors in use are shown be-
low. When wiring your own connector, be ab-
solutely certain to observe the proper polarity
on the pin connections. Consult with an elec-
trician if you have any doubts about your wir-
ing!
Be sure that your house wiring is capable
of sufficient current capacity on the 220 Volt
circuit to be used, especially if this circuit is
shared with household appliances. It always
is preferable to operate the VL-1000 from a
dedicated 220 Volt circuit with its own circuit
breaker.
Transceiver or Exciter
Interconnections
The interface wiring to the transceiver or trans-
mitter which drives the VL-1000 consists of:
(A) A 50 Ω coaxial cable for carrying RF drive
power from each exciter to the amplifier;
(B) A 2-conductor transmit/receive control
cable which provides a closure to ground
signal from the transceiver to the amplifier
during transmission;
(C) A (supplied) 2-conductor ALC (Automatic
Level Control) line, used to limit the drive
level from the exciter to the amplifier; and
(D) When using a compatible Yaesu trans-
UK Plug Australian
Plug
European
Plug
USA
Plug
(viewed from plug prong side)
VP-1000 AC Cable wiring
(European version)
(U.S.A version)
Page 3VL-1000 Operating Manual
Installation
FT-920/VL-1000
FT-1000MP/FT-650/VL-1000
nected to the INPUT 1/PTT 1/ALC 1 jacks, and
that all cables from exciter #2 are connected
to the INPUT 2/PTT 2/ALC 2 jacks. When us-
ing a B
AND DATA cable for interconnection, you
do not need the PTT cable for the correspond-
ing exciter, as the T/R control signal will be
made via the B
AND DATA cable.
ceiver, a B
AND DATA cable may be con-
nected which provides automatic band
change and T/R control (thus eliminating
the need for cable (B) above), and +48 V
DC supply voltage On/Off control (if the
REMOTE switch on the rear panel of the
VL-1000 is set to the ON position).
Typical installation diagrams are shown
below. When two exciters are utilized, be cer-
tain that all the cables from exciter #1 are con-
Page 4 VL-1000 Operating Manual
connections labeled TX GND on the rear panel
of the transceiver; do not, however, use the
transceiver’s P
TT jack, as it was designed for
PTT input (via a footswitch, etc.), not for am-
plifier control.
Automatic Amplifier Tune-Up
If you connect the supplied control cable be-
tween the transceiver’s P
TT or REMOTE jack and
the VL-1000’s BAND-DATA 2 jack, the trans-
ceiver will automatically transmit when you
press the amplifier’s front panel F SET key
(make sure that the M
ODE switch of the trans-
ceiver is set to CW, RTTY, or some other con-
tinuous mode, and set the D
RIVE or RF PWR
control fully clockwise, if you want to perform
antenna tuning). To accomplish this function,
pin 11 of the BAND-DATA 2 jack closes the
transceiver’s P
TT or REMOTE jack to ground, thus
placing the transceiver in the transmit condi-
tion.
Automatic Amplifier Tune-Up
using FT-1000MP Transceiver
When using the VL-1000 in conjunction with
the FT-1000MP transceiver, the front panel F
SET key may be used to initiate an automatic
tuning procedure for the amplifier. In order to
accomplish this, Menu Item 7-9 on the FT-
1000MP must be set to “KEYER ” (which is its
default value), and a control cable must be con-
nected between the FT-1000MP’s R
EMOTE jack
and the VL-1000’s BAND-DATA 2 jack. The
required wiring for this cable is shown below.
Installation
Antenna Connections
As many as four HF or 50 MHz antennas
may be connected to the rear panel Antenna
jacks, labeled ANT 1 ~ ANT 4. The antenna to
be used on a particular band will be memo-
rized once you make the selection manually
via the front panel ANT switch. See the “Op-
eration” section of this manual for more de-
tails.
ALC Connections
The VL-1000 provides negative-going ALC,
which provides a negative voltage to the ex-
citer which begins to appear when sufficient
drive power from the exciter is being received;
the voltage becomes of greater (negative)
magnitude if the drive is increased, so as to
prevent overdrive of the amplifier. The voltage
range provided from the VL-1000 is 0 to 10
Volts DC, and this is compatible with all Yaesu
transceivers as well as many exciters of other
manufacture. At 1000 Watts of output power,
the typical voltage generated for use with
Yaesu transceivers is about 4 V DC.
The ALC cable must be connected between
the transceiver and VL-1000 to prevent over-
drive of the amplifier, and especially to facili-
tate the proper operation of the protection cir-
cuitry if sudden antenna system problems
should cause the SWR to rise to dangerous
levels.
PTT Connections
These jacks, labeled PTT 1 and PTT 2, ac-
cept T/R control signals from your exciter.
Grounding the center pin of one of these PTT
jacks will cause the amplifier to be placed in
the “Transmit” mode.
These jacks utilize a positive voltage (5V
DC) at very low current (10 mA maximum), so
they are compatible with most open-collector
NPN transistor amplifier control circuits in mod-
ern transceivers. Mechanical relays may also
be used, so long as they are “floating” con-
tacts that do not apply a voltage to the VL-
1000’s PTT jacks. On Yaesu transceivers, use
either the transistor or relay (Normally Open)
Page 5VL-1000 Operating Manual
Plug Pinout
as viewed from rear panel as viewed from rear panel
as viewed from rear panel
as viewed from rear panel
BAND-DATA 1 CONTROL
BAND-DATA 2 DC48V IN
+13.5 V
TX GND
GND
BAND DATA A
BAND DATA B
BAND DATA C
BAND DATA D
TX INH
NC
GND
REMOTE
PS ALARM
LOW POWER
GND
-12V INPUT
+12V INPUT
+48V INPUT
+48V INPUT
+48V INPUT
+48V INPUT
GND
GND
GND
GND
+13.5 V
TX GND
GND
BAND DATA A
BAND DATA B
BAND DATA C
BAND DATA D
TX INH
F SET COMMON
F SET 1
F SET 2
NC
NC
NC
GND
RCA Plug
GND or (-)
SIGNAL or (+)
Page 6 VL-1000 Operating Manual
4. LOW Switch
This switch selects the RF output power.
When in the LOW position, the RF output
power will be reduced to (approximately) 500
watts PEP, and “
LOWLOW
LOWLOW
LOW” will appear on the dis-
play.
Note: This switch should be set to the LOW
position when operating from a 100 ~ 117 VAC
power source.
5. INPUT Switch
Press this switch to toggle between the ex-
citers connected to the INPUT 1 and INPUT 2
connectors on the rear panel. The indicator
INPUT 1INPUT 1
INPUT 1INPUT 1
INPUT 1” or “
INPUT 2INPUT 2
INPUT 2INPUT 2
INPUT 2” will appear on the dis-
play to indicate which exciter is in use.
6. ATT Switch
This switch activates a 3 dB input RF power
attenuator, to reduce excessive input power
from the exciter. It should be on if exciter out-
put exceeds 100 watts PEP, as is the case
when using the FT-1000/D. The “
ATTATT
ATTATT
ATT” indica-
tor will appear on the display when this switch
is on.
Front Panel Controls and Switches
1. POWER Switch
This switch turns the VL-1000 on and off.
When the amplifier is turned off, the INPUT 1
jack is connected directly to the ANT 1 jack. If
using a Yaesu transceiver with a B
AND DATA
cable, the VL-1000 AC power will be remotely
controlled by the transceiver’s power switch
when the REMOTE switch on the rear panel
of the VL-1000 is set to ON.
2. OPERATE Switch
Pressing this switch activates the power am-
plifier section of the VL-1000. When the power
amplifier is activated, “
OPERATEOPERATE
OPERATEOPERATE
OPERATE” will appear
on the display. Press this switch again to turn
off the power amplifier section.
3. DIM Switch
This switch selects the brightness level of
the LCD display. In low-light situations, acti-
vating the Dimmer may reduce excess bright-
ness in the display. For normal room lighting,
however, the Dimmer should be set to OFF for
best visibility.
Page 7VL-1000 Operating Manual
When using the Grapfical SWR Meter dis-
play, press and hold this switch for ½ second
to change the frequency span of the meter.
11. TUNER Switch
Pressing this switch places the antenna
tuner in the transmit signal path. When the
antenna tuner is activated, the “
TUNERTUNER
TUNERTUNER
TUNER” indi-
cator appears on the display. Press this switch
again to turn off the antenna tuner.
12. TUNE Switch
This switch activates the auto-tune system
manually. Normally, when the operating band
is changed, the tuner will automatically adjust
itself for the same antenna selection and
matching impedance which was set the last
time that band was used. Press this switch to
retune if you are on a different part of the band,
or if the SWR is still too high after automatic
tuning. Manual-restart with this switch can be
used to “force” rematching of the impedance
presented by the antenna system at any time.
13. F SET Switch
Press this switch to activate the exciter and
tune up the VL-1000 automatically when us-
ing the FT-1000MP (with the cable shown on
page 4 connected between the BAND DATA
2 jack on the VL-1000 and R
EMOTE jack on the
FT-1000MP).
14. CONTRAST Knob
This knob used to adjust the LCD contrast.
15. LCD Display
The upper half of the display consists a 320
x 60 dot-matrix display showing operating sta-
tus of the VL-1000, including the Graphical
SWR meter. The lower half contains various
icons representing enabled features.
Front Panel Controls and Switches
7. ANT Switch
This switch can be used for manual selec-
tion of up to four antennas. The antenna se-
lection is stored in memory, so once selected
and matched on a particular band, the same
antenna will be reselected automatically when
recalling that band. One of the indicators “
ANTANT
ANTANT
ANT
11
11
1” to “
ANT 4ANT 4
ANT 4ANT 4
ANT 4” will appear on the display to indi-
cate which antenna is in use.
8. DISPLAY 1 Switch
Press and hold this switch for ½ second to
copy the current display into Display Memory
#1. Press this switch momentarily to recall the
Display Memory 1 data to the display. This
switch is also used for alignment of the ALC
system, if needed.
9. DISPLAY 2 Switch
Press and hold this switch for ½ second to
copy the current display into Display Memory
#2. Press this switch momentarily to recall the
Display Memory 2 data to the display. This
switch is also used for alignment of the ALC
system, if needed.
10. DISPLAY SELECT Switch
This switch is used to select the display
function, with the selections being provided in
the following sequence:
Multi Meter 1

Multi Meter 2

PO Meter 1

PO Meter 2

Graphical SWR Meter

Multi Meter 1

Page 8 VL-1000 Operating Manual
5. PTT Jacks
Shorting the center pins of these jacks to
ground activates the amplifier for transmission.
This function will normally be provided by am-
plifier control contacts in the T/R relay (or open-
collector NPN transistor) in the exciter. Open
circuit voltage at this PTT jack is 5V DC, and
maximum closed circuit current required is 10
mA.
6. ALC Jacks
These RCA jacks provide the ALC (output)
voltage for control of the exciter’s RF drive
level. The ALC control voltage range is 0 to
10 VDC.
7. GND Terminal Post
Connect this terminal to a good earth ground
using the shortest practical length of heavy
braided cable. All other station equipment
should be grounded to the same ground sys-
tem.
1. ANTENNA Jacks
Connect these type M (SO-239) jacks to
your antennas using large (RG-213 or larger)
50 Ω impedance coaxial cable with mating
plugs (Type M/PL-259).
2. REMOTE Switch
When this switch is in the ON position, the
VP-1000’s +48V DC supply voltage will be con-
trolled by the transceiver’s power switch if you
are using a Yaesu transceiver with a B
AND DATA
cable.
3. BAND-DATA 1 Jack
This 8-pin DIN jack provides for a supplied
control cable for the Yaesu transceivers, to al-
low automatic band selection, T/R control, and
power on/off control.
4. BAND-DATA 2 Jack
This D-sub 15-pin jack provides the same
connections as does the BAND-DATA 1 Jack,
plus additional connections for special appli-
cations.
Rear Panel Connectors and Switch
Page 9VL-1000 Operating Manual
8. INPUT Jacks
These type M (SO-239) jacks should be
connected through a short 50 Ω coaxial jumper
to the (transmitting) antenna jack of the trans-
ceivers.
9. CONTROL Socket
Connect this 8-pin Molex socket to the CON-
TROL socket on the Yaesu VP-1000 AC Power
Supply. This socket provides ±12V DC and
control signals for the VL-1000.
10. DC48V IN Jack
Connect this 8-pin Molex socket to the OUT-
PUT socket on the Yaesu VP-1000 AC Power
Supply. This socket provides +48V DC sup-
ply voltage for the power amplifier of the VL-
1000.
Rear Panel Connectors and Switch
Operating Advice
For most operating situations, the REMOTE switch on the rear panel of the VL-1000 should
be set to the “Off ” position (unless you have connected an appropriate B
AND DATA cable for
remote power control). Before commencing initial checkout, verify that the R
EMOTE switch is
OFF.
If the REMOTE switch is on, and the VL-1000 is not connected to a Yaesu transceiver
providing remote power actuation, Error Message #1005 (which warns of “Excessive PA DC
Voltage”) will appear following the “Self Test” procedure. If you experience this situation,
check to be sure that the R
EMOTE switch has not accidentally been turned on.
Page 10 VL-1000 Operating Manual
Operation
Preliminary Checks
Before switching on power, recheck all in-
terconnections. Be certain that the ground, RF
input, and ALC connection cables are all se-
cure.
If using a Yaesu FT-980 transceiver for ex-
citation, set the L
IN AMP switch on the rear panel
to the (upper) Position 1. If using an FT-
757GX(II) or FT-767GX, ensure that the L
IN or
L
INEAR switch is depressed (Position 1). Other
Yaesu transceivers do not require special
switch setting on the transceiver prior to com-
mencing amplifier operation
Band Changes
By now, you have noticed that there is no
“B
AND” switch on the VL-1000. Selection of the
frequency band is accomplished in one of two
ways:
If using a Yaesu transceiver with a BAND
DATA control cable, band selection and an-
tenna rematching will occur automatically
whenever you change bands on the trans-
ceiver. Similarly, the antenna last used by
the VL-1000 on each band will be reselected
when that band is recalled on the trans-
ceiver.
If you are using a transceiver without a band
control cable, injecting a carrier from the
exciter for few seconds causes the VL-
1000’s microprocessor to count the input
frequency and automatically set the ampli-
fier up for operation on the appropriate band.
Here are the appropriate procedures:
1. Set the M
ODE switch of the exciter to CW,
and the D
RIVE or RF PWR control of the
exciter so as to provide 50 Watts of less
of drive power to the VL-1000.
2. Press the F SET key on the VL-1000 mo-
mentarily, then press the P
TT switch of
the exciter to activate the transmitter. If
necessary, close your key to allow a car-
rier to be transmitted for a few seconds.
3. The microprocessor of the VL-1000 will
now detect the frequency of the input sig-
nal, and the amplifier will then set itself
to the matching band.
4. When the correct band appears on the
VL-1000 display, release the exciter’s
P
TT switch so as to return to the receive
mode. Preliminary band setup is now
complete.
If you attempt to transmit on an improper
band (for example, at 6.2 MHz), the VL-1000
will automatically be placed in the “THRU”
mode, and no amplification will take place.
Antenna Selection
Pressing the ANT switch repeatedly causes
the VL-1000 to “toggle” between the rear panel
antenna jacks. Just remember to select the
correct antenna when making band changes
during initial operation, and the VL-1000 will
thereafter remember which of ANT 1 through
ANT 4 should be selected when you return to
that band.
When the amplifier is turned off, the default
antenna selection is ANT 1. You may wish to
consider putting a grounding-type coaxial
switch in the coaxial line connected to the ANT
1 jack, so as to shunt static electricity or nearby
lightning pulses to ground.
Fan Operation
The cooling fans for the amplifier and power
supply are both thermostatically controlled. The
thermostats are set to activate well before “dan-
gerous” heat has built up inside the cabinets.
It is quite normal for the fans to cycle on and
off, occasionally, even during receive opera-
tion. The fans also may continue to operate
after the front panel power switch is turned off,
this feature allows the complete dissipation of
heat so as to ensure long life of the compo-
nents.
Important Note
The VL-1000 requires input drive power of
50~60 watts. Please ensure that the trans-
mitter used with this amplifier is capable of
producing at least 60 Watts of drive power
so as to ensure full output from the VL-1000.
When driving the VL-1000 with a transceiver
which includes a built-in antenna tuner,
please turn the transceiver’s antenna tuner
off when using the VL-1000.
Page 11VL-1000 Operating Manual
PO Meter 2:
Peak Power Output Bar Graph (large) with
Peak-hold Segment
Peak and Average Power Output Numeric
Displays
SWR Numeric Display
Current TX/RX Status
Current Frequency Band (Numeric Display)
Antenna Tuning Meter:
Current (changing) SWR Bar Graph
Pictorial display of relative positions of An-
tenna Tuner Variable Capacitors
Current Frequency Band (Numeric Display)
Graphical SWR Meter:
Current Antenna Jack in Use (ANT 1 ~ ANT
4)
Display of “TUNER OUT” SWR (Dots on Graph)
Display of “TUNER IN” SWR (Dashes on
Graph, this indicator does not indicate when
SWR is above 1.5:1.)
Current Frequency Band (Numeric Display)
User-Defined Span on Band Display
1.8 ~ 14 MHz: 100/500/1000 kHz (selectable)
14 ~ 28 MHz: 500/1000 kHz (selectable)
28 ~ 54 MHz: 1000 kHz (fixed)
Initial Amplifier
SELF-TEST Protocol
When the VL-1000 is initially turned on, it
enters a “S
ELF -TEST” mode, in which the
amplifier’s microprocessor checks various as-
pects of its control signals and supply voltages.
If the amplifier’s self-test routine is success-
fully completed, the following display will be
shown:
Operation
Metering
An extensive array of metering selections
are available to the owner of the VL-1000.
Pressing the DISPLAY SELECT switch allows
you to choose from among these options.
Multi Meter 1:
Peak and Average Power Output Bar Graphs
Peak and Average Power Output Numeric
Displays
PA Drain Current Bar Graph
PA Drain Voltage Bar Graph
Current TX/RX Status
SWR Numeric Display
Current Frequency Band (Numeric Display)
Multi Meter 2:
Peak and Average Power Output Bar Graphs
Peak and Average Power Output Numeric
Displays
PA Drain Current Bar Graph
Current TX/RX Status
SWR Bar Graph
SWR Numeric Display
Current Frequency Band (Numeric Display)
PO Meter 1:
Peak and Average Power Output Bar Graphs
with Peak-hold Segment
Peak and Average Power Output Numeric
Displays
SWR Numeric Display
Current TX/RX Status
Current Frequency Band (Numeric Display)
Page 12 VL-1000 Operating Manual
Drive Power Check
If this is first-time operation, or whenever
using a different exciter (transceiver), perform
this procedure to check peak exciter driving
power.
Turn the VL-1000 POWER switch on by
pressing the switch in.
Make sure that the OPERATE and TUNER
switches on the VL-1000 are both off.
Connect a 100-watt dummy load to the ANT
1 jack on the VL-1000, if available. If a
dummy load is not available, connect an
antenna which presents a 50 Ω resistive
load to the ANT 1 jack. Tune your exciter to
a clear frequency.
Set the transceiver to the CW mode, and
preset the D
RIVE or RF PWR control on the
transceiver fully clockwise (maximum).
Briefly key the transmitter, while watching
the display of the VL-1000. If the (indicated)
exciter power is above 100 watts, turn the
ATT switch ON. Never press the ATT
switch while transmitting.
Drive power must be at least 50 watts for
accurate SWR detection, and 70 to 80 watts
for optimum tuner performance. Full power
output will be obtained from the VL-1000 when
the drive power is between 50 and 80 watts,
depending on the band in use. When the VL-
1000 power amplifier section is activated, ALC
voltage is fed back from the amplifier to the
transmitter, to reduce power output to this level.
However, much higher drive power to the am-
plifier will cause the protective circuitry to dis-
able the amplifier (to avoid damage to the in-
put circuits). Therefore, when using an exciter
delivering more than 100 Watts of drive power,
the input attenuator should be used. With
Yaesu transceivers, only the FT-1000/D series
should require the use of the attenuator, as
the FT-1000/D is capable of up to 200 Watts
of output power.
ALC Alignment
When this amplifier is used with Yaesu
transceivers such as the FT-1000MP, FT-990,
or FT-920, the ALC system normally will not
require alignment. However, if it appears that
full power is not being achieved due to exces-
sive ALC action, you may align your VL-1000’s
ALC system to that of your transceiver via this
simple procedure:
1. Connect the transceiver to the INPUT 1
jack, and select “INPUT 1” via the front
panel INPUT switch.
2. Set the RF output power to the HIGH
power condition via the front panel LOW
switch.
3. Press the TUNER switch to turn off the an-
tenna tuner (“TUNER” indicator will be
OFF).
4. Press and hold in the INPUT switch for ½
second; this initiates the “ALC Alignment”
mode.
5. Start with the transceiver’s D
RIVE or RF PWR
control fully counter-clockwise, then rotate
the D
RIVE or RF PWR control to the fully
clockwise position while transmitting.
6. If the power output from the amplifier (as
displayed on the AVG meter) does not
reach 1000W because of the effect of the
VL-1000’s ALC voltage at full exciter drive,
keep the transceiver’s D
RIVE or RF PWR
control fully clockwise, then press and hold
in the DISPLAY 2 key until the power out-
put from the amplifier reaches 1000 Watts.
7. If, on the other hand, the ALC voltage from
the VL-1000 does not cause the exciter
drive to be controlled such that the power
output from the amplifier limits at 1000
Watts, do the reverse procedure from that
just described. First, reduce the drive from
the exciter until the VL-1000’s power out-
put is 1000 Watts. Next, press and hold in
the DISPLAY 1 key until the output power
from the amplifier is just reduced from the
1000 Watt level. Now set the transceiver’s
D
RIVE or RF PWR control fully clockwise, and
press the DISPLAY 1 key (to increase ALC
voltage/decrease power output) or DIS-
Operation
Page 13VL-1000 Operating Manual
PLAY 2 key (to decrease ALC voltage/in-
crease power output) until the power out-
put from the amplifier reaches 1000 Watts
(these tuning procedures should be as
short as possible).
8. Return the input transceiver to the receive
mode.
9. Press the LOW switch to select LOW
power operation.
10. Again transmit a carrier at full drive power;
press the DISPLAY 1 or the DISPLAY 2
key, as needed, until the power output from
the amplifier reaches 500 Watts. Now re-
turn the exciter to the receive mode.
11. Press and hold in the INPUT switch for ½
second to exit the ALC Alignment mode.
12. Press the TUNER switch to turn on the an-
tenna tuner (“TUNER” indicator will be ON).
13. Repeat steps 4 through 11.
14. You can align the ALC voltage of the trans-
ceiver that is connected to the INPUT 2
jack in the same way. First select “INPUT
2” via the front panel INPUT switch, then
follow the same procedure as described
above.
Initial Antenna Matching Procedure
Briefly key the transmitter, while watching
the SWR indicator in the display of the VL-
1000 (SWR calculation is automatic, so no
full-scale presetting is necessary).
If the SWR is above 1.5:1, activate the An-
tenna Tuning Unit to retune the impedance
presented by the antenna system, as follows;
Press the TUNER switch;
Press the TUNE switch;
Transmit a carrier from the exciter in the
CW or other continuous mode. Do not
attempt to perform antenna tuning by
whistling into the microphone in an SSB
mode, as the drive power delivered to
the antenna tuner’s microprocessor will
not be consistent.
During antenna tuning, a special Antenna
Tuning Meter display will be observed, show-
ing the progress of the SWR reduction as
well as showing a depiction of the relative
positions of the two Variable Capacitors in
the antenna tuner (VC-A and VC-B).
Operation
At the completion of the tuning process,
COMPLETECOMPLETE
COMPLETECOMPLETE
COMPLETE” will appear on the display.
Once tuning has been successfully com-
pleted, the display will shift to the Graphical
SWR Meter automatically. In this mode,
both the “before tuning” (THRU) and “after
tuning” (A/T) SWR conditions present at the
VL-1000’s current antenna jack will be
shown. As you move around the band, new
antenna tuning settings will be recorded on
the Graphical SWR Meter, giving you a clear
picture of the tuning action of the VL-1000’s
automatic antenna tuner.
If “
COMPLETECOMPLETE
COMPLETECOMPLETE
COMPLETE” does not appear, it means
that an excessively-high SWR exists on the
coaxial line; “
ERRORERROR
ERRORERROR
ERROR” will appear on the dis-
play, and either “
HI SWRHI SWR
HI SWRHI SWR
HI SWR” or “
PROTECTPROTECT
PROTECTPROTECT
PROTECT” will
come on to assist you in knowing the exact
nature of the fault. If either of these warn-
ing messages should appear on the display,
check the antenna, feedline, and antenna
connection.
If “
COMPLETECOMPLETE
COMPLETECOMPLETE
COMPLETE” appears after tuning, press
the OPERATE switch. The VL-1000 is now
ready for operation.
Note: During antenna tuning, the tuning car-
rier is passed through the power amplifier then
fed to a 20dB power attenuator circuit to mini-
mize interference to other operators; this power
reduction takes place even if the OPERATE
switch is on.
Page 14 VL-1000 Operating Manual
Operation
Linear Amplifier Operation
Although continuous full exciter power is re-
quired for accurate SWR measurement and an-
tenna matching, this will cause overheating if
transmitting for an extended period when OP-
ERATE switch is depressed (that is, when the
power amplifier section is on). So once the
antenna has been matched the first time, re-
duce the setting of the exciter’s D
RIVE or RF
PWR control if you contemplate operation us-
ing a continuous-carrier operating mode (see
the guidelines below).
For SSB and CW operation, make sure to
adjust the M
IC GAIN and/or DRIVE control on the
transceiver for proper ALC indication on the
transceiver ALC meter, as described in the
transceiver manual. Generally, for SSB, the
ALC meter indication should not deflect beyond
a certain ALC limit (the “ALC” zone on the
transceiver’s meter) on voice peaks; on CW,
the ALC indication should be just enough to
cause slight meter deflection. Higher ALC lev-
els may produce distortion or key clicks, with-
out producing any additional power output.
For FM, SSTV, RTTY, AMTOR or packet,
press the LOW switch to select the LOW power
condition to prevent the overheating during
continuous operation for extended periods.
For AM operation, adjust the D
RIVE or RF
PWR control on the transceiver so that the AVG
power meter on the VL-1000 does not exceed
250 watts when transmitting a carrier. On voice
peaks, adjust the M
IC GAIN control on the trans-
ceiver so that the PEAK power meter on the
VL-1000 does not exceed 1000 watts.
Operating Precautions
Summarized below are some precautions to adhere to in order to ensure long life and trouble-
free operation with the VL-1000.
Do not transmit, after changing bands, until “
COMPLETECOMPLETE
COMPLETECOMPLETE
COMPLETE” appears on the display.
Do not transmit when turning the POWER switch or the ATT switch on or off.
When changing bands, always make certain that the VL-1000 is set for the same band as
the transceiver before transmitting, and that the proper antenna is connected. Remem-
ber that ANT 1 is automatically selected when the VL-1000 is switched off.
Reduce the drive power or shorten transmissions if Warning Message #1001 appears on
the display (see next page).
Beeper on/off
When you press a switch, the beeper pro-
vides useful audible feedback to confirm that
the switch was successfully activated.
If you want to turn the beeper off, first turn
the VL-1000 off, then press and hold in the
DISPLAY 1 and DISPLAY 2 switches while
you turn the VL-1000 on. To turn the beeper
back on again, repeat this switch-on procedure.
Resetting the CPU
The VL-1000 can be reset so as to clear all
settings, display memories, and antenna tuner
data; these will be reset to their factory defaults.
To reset the microprocessor, press and hold
in the OPERATE and DIM switches while you
turn the VL-1000 on.
Page 15VL-1000 Operating Manual
If one of these messages should appear, a potentially serious situation is being experienced.
Turn the amplifier off, correct the problem, then turn the amplifier back on. If the problem has,
indeed, been corrected, full operation at the 1000 Watt power level should be restored.
#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA
#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA
#1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA
The Power amplifier heatsink is overheated.
Reduce the drive power or shorten transmis-
sions to cooling the heatsink.
#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1
#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1
#1002: PROTECTION CIRCUIT DETECTS SWR > 3:1
The SWR is too high (above 3:1). Check the
antenna, feedline, and coaxial cable
connector(s).
#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE
#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE
#1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE
More than 50 watts of imbalance has occurred
among the four sections of the power amplifier.
A transistor or LPF Unit power combiner failure
may be responsible.
#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER
#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER
#1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER
The recommended drive level from the exciter
(transceiver) has been exceeded. Reduce the
drive level or set the ATT switch to the ON po-
sition.
#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE
#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE
#1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE
The recommended Drain Voltage of the final
amplifier has been exceeded. Check the power
supply voltage regulator and associated cir-
cuitry.
#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT
#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT
#1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT
The recommended Drain Current of the final
amplifier has been exceeded. Check the power
FETs and associated circuitry.
#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE
#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE
#1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE
The VP-1000 or its interconnection to the VL-
1000 has failed. Check the cable connection
from the VL-1000 and/or the VP-1000. This
Warning only appears when using the Yaesu
VP-1000 power supply unit.
#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR
#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR
#1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR
The VL-1000 and the transceiver are set up with
conflicting band selection, due to a logic error
in the Band Data matrix, a failure in the B
AND
DATA cable, or similar problem. The VL-1000 is
placed in the "Thru" mode automatically when
this occurs.
WARNING Messages
Page 16 VL-1000 Operating Manual
General
Frequency Coverage: 160 ~ 6 Meter Amateur Bands
(USA Version: 160 ~ 15, 6 Meter Amateur Bands)
Power Output: 1000 Watts @ 220V AC Input to VP-1000 Power Supply
Continuous Transmission Period: 100% @ 500 W for 1 hour
Case Size (WHD): 410 x 135 x 439 mm
Weight (Approx.): 21 kg
Supply Voltage: 48 VDC, 12 VDC, 12 VDC
Power Consumption (Max.): 48 A @ 48 VDC, 2.8 A @ 12 VDC, 0.1 A @ 12 VDC
Linear Amplifier Section
Excitation Power: 50 ~ 80 Watts
ALC Voltage (output) Range: 0 to 10 V (Nominal 4V @ 1000 W output)
Spurious Radiation: less than 50 dB @ 160 ~ 10 Meter Amateur Bands
less than 60 dB @ 6 Meter Amateur Band
Third-order IMD: less than 30 dB @ 1000 W PEP (Typical)
Input/Output Impedance: 50 Ω, unbalanced
Automatic Antenna Tuner Section
Impedance Matching Range: 16 to 100 Ω, unbalanced @ 160 Meter Amateur Band
16 to 150 Ω, unbalanced @ 80 ~ 10 Meter Amateur Bands
25 to 100 Ω, unbalanced @ 6 Meter Amateur Band
Frequency Range: 160 ~ 6 Meter Amateur Bands
Matching Time: less than 10 seconds
Matched SWR: 1.5:1 or better
Tuning Memory Register: 240 channels
Specifications are subject to change, in the interest of technical improvement, without nortice or oblogation.
Specifications
CAUTION!
Changes or modifications to this device not expressly approved by Yaesu
Musen could void the user’s authorization to operate this device.
Copyright 2011
VERTEX STANDARD CO., LTD.
All rights reserved
No portion of this manual
may be reproduced without
the permission of
VERTEX STANDARD CO., LTD.
Printed in Japan.
E08971004
1

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