Icom IC-208H Packet operation, Bps packet operation, Data speed, Set the TNC for transmit

11 OTHER FUNCTIONS

■Packet operation

D1200 bps packet operation

qConnect the transceiver and a TNC as illustrated below.

DData speed

For packet operation, the transceiver can be set to one of two data speeds: 1200 bps or 9600 bps.

q DATA IN

TNC side

TX AUDIO

qWhile pushing [SET•LOCK], push [PWR] for 1 sec. to enter initial set mode.

w GND

e PTT P

GND

wPush [SET•LOCK] or [S.MW•MW] to select the ‘BPS’ item. e Rotate [DIAL] to select the desired data speed.

y P SQL

rPush [PWR] to exit initial set mode.

t AF OUT

wSet the TNC for transmit.

RX AUDIO

PTT

SQL

For 1200 bps operation—

• Disconnect the microphone plug from the microphone

connector during data transmission, otherwise the data signal and voice signal are simultaneously transmitted.

For 9600 bps operation—

• When the transceiver is set for 9600 bps data transmis-

sion in set mode, the microphone signal is automatically

cut. Therefore, it is not necessary to disconnect the mi-

crophone plug from the connector in this case.

• When pushing [PTT] during data transmission, data trans- mission is interrupted and voice signals have priority.

eSet transmit delay on the TNC.

rAdjust 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 trans- mission—compare the received audio output level when receiving a TNC modulated signal with high level voice signals using the microphone. Then adjust the TNC mod- ulated signal to a lower level than the voice modulated signal.

71