Icom IC-207H [69/80] D 1200 bps packet operation

Icom IC-207H [69/80] D 1200 bps packet operation
NOTE:
Read the instructions supplied with your TNC carefully
before attempting packet operation with the IC-207H.
Pin t AF OUT is for 1200 bps operation only. This pin
cannot be used for 9600 bps operation.
Over modulation may degrade signal quality. If you nd
that many transmissions are failing, re-adjust the modu-
lation level.
14
OTHER FUNCTIONS
64
D 1200 bps packet operation
q Connect the IC-207H and a TNC as illustrated below.
w Set the TNC for transmit.
e Set transmit delay on the TNC to 3050.
r Adjust the TNC frequency deviation if necessary.
When using a deviation meter:
Adjust the output of the TNC so that frequency deviation is in the
range ± 3 to 4 kHz.
When NOT using a deviation meter:
A receiver or transceiver is needed to monitor the transmission
compare the received audio output level when receiving a TNC
modulated signal with high level voice signals using the micro-
phone. Then adjust the TNC modulated signal to a lower level
than the voice modulated signal.
DATA IN
SQL
PTT
RX AUDIO
GND
TX AUDIO
TNC SIDE
GND
PTTP
SQ
AF OUT

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