Filter
Top Products
71
15
OTHER FUNCTIONS
D1200 bps packet operation
q Connect the transceiver and a TNC as illustrated below.
w Set the TNC for transmit.
e Set transmit delay on the TNC to 30–50.
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 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.
•Read the instructions supplied with your TNC carefully be-
fore attempting packet operation with the transceiver.
•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 find
that many transmissions are failing, re-adjust the modula-
tion level.
SQL
PTT
RX AUDIO
GND
TX AUDIO
TNC side
q DATA IN
w GND
e PTT P
t AF OUT
y P SQL
Downloaded by
Amateur Radio Directory
www.hamdirectory.info