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61FT-1900R OPERATING MANUAL
The FT-1900R may be used for 1200 bps Packet operation, using most all commonly-
available Terminal Node Controllers (TNCs). Connections between the transceiver and the
TNC are accomplished via the front panel Microphone connector and rear panel External
Speaker jack, per the diagram below.
The audio level from the receiver to the TNC may be adjusted by using the VOL knob, as
with voice operation. The input level to the FT-1900R from the TNC may be adjusted via
Set Mode Item “27 MCGAIN;” see page 64 for details.
Be sure to turn the transceiver and TNC off before connecting the cables, so as to prevent
voltage spikes from possibly damaging your transceiver.
Remember to readjust the default microphone input level to “LVL 5” (Set Mode Item “27
MCGAIN”) when Packet operation is finished.
PACKET OPERATION
Pin 4: GND
Pin 5: PACKET TX IN
Pin 6: PTT
PACKET RX OUT
RJ12/6
6 Position 6 Contact
Modular Plug
2-contact 3.5-mm
Mini Phone Plug
EXT SP REAR PANEL()MIC
()
DATA
OUT
DATA
IN PTT
65


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