Icom IC-207H - Page 75

)
1200 bps packet operation
| Connect the IC-207H and a TNC as illustrated below.
TNC SIDE
) Set the TNC for transmit.
Set transmit delay on the TNC to 300-500 msec.
) Adjust the TNC frequency deviation if necessary.
)e When using a deviation meter:
Adjust the output of the TNC so that frequency deviation is in the
range + 3 to 4 kHz.
ye 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.
OTHER FUNCTIONS 14
Read the instructions supplied with your TNC carefully
Y before attempting packet operation with the IC-207H.
Y ¢ Pin @) AF OUT is for 1200 bps operation only. This pin
Y cannot be used for 9600 bps operation.
Y ¢ Over modulation may degrade signal quality. If you find
Y that many transmissions are failing, re-adjust the modu-
7 \ation level.
ENGLISH