53
9
DATA COMMUNICATION
■ Operating mode notes
Use FM mode for 9600 bps operation.
Use SSB or FM mode for 1200 bps operation.
■ Operating frequency notes
DD
Operating notes for RTTY and AMTOR
RTTY or AMTOR operating frequency in LSB mode
differs from the displayed frequency.
[Your operating freq.] = [Displayed freq.] – 2125 Hz
(when the frequencies of the RTTY demodulator in
your TNC or TU are — mark = 2125 Hz and space =
2295 Hz).
DD
Operating notes for PACKET
PACKET operating frequency in LSB mode differs from
the displayed frequency.
[Your operating freq.] = [Displayed freq.] – 2125 Hz
(when the frequencies of the PACKET demodulator in
your TNC are — 2125 Hz/2315 Hz).
DD
Frequency setting example for AFSK
- When operating RTTY at 144.090 MHz:
Set “LSB 144.092125 MHz” (if you use mark=2125 Hz
and space=2295 Hz).
- When operating PACKET at 144.110 MHz:
Set “LSB 144.112215 MHz” (if you use
2115 Hz/2315 Hz).
■ AFSK operation
Connect external equipment to either the [DATA]
(MAIN or SUB) or [ACC(1)] socket as described on the
previous page. Set the ACC socket using the general
set mode in advance when you operate via the ACC
socket. (See below.)
q Push [M/S•BAND] to select the desired frequency
band.
w Push [FM] or [SSB/CW] to select the desired oper-
ating mode.
• LSB is normally used.
• FM is used for PACKET.
e Adjust the audio output level with [AF] control.
• Use [RF/SQL] when required.
r Adjust the desired RF output power.
•When using the [MIC] connector for external equipment
connection, the [MIC GAIN] control should be adjusted.
t Select operating mode.
y Control the transceiver from the connected PC or
TNC (TU).
IMPORTANT:
•Remove the microphone from the [MIC] connector
when operating below 1200 bps rate to protect
from noise coming from the microphone.
•During 9600 bps rate operation, noise signals from
the microphone may not effect PACKET signals.
However, PACKET signal transmission is inter-
rupted when [PTT] is pushed.
•Remove the ACC plug, or turn the TNC power OFF
during phone operation (SSB or FM). The modula-
tion input from the [ACC(1)] socket is always ap-
plied to the modulation circuit.
DD
Connections via front panel
When connecting a TNC or Scan converter, etc. to the
[MIC] connector, [MIC GAIN] and [AF] adjustments are
required. The [MIC] connector accepts up to 1200 bps.
Use SSB or FM mode for operation.
[MIC GAIN] and [AF] control adjustments are re-
quired.
