AP2.2 NBDP test
AP2-5
AP2.2.2 ARQ communication
To test the NBDP, make a call to a coast station which handles public correspondence
call in ARQ mode. The test call is made automatically (“TEST+” and “HELP+”
commands) or manually (“OPR+” command).
1. Check that the receiving mode is set to “AUTO” on the NBDP terminal.
Menu operation: [F3][6]: Manual Reception
2. Check that Print appears on the display, showing the terminal is in Print mode. If not,
set Real Time Printing to ON.
Menu operation: [F1][6]: Real Time Printing
3. Set the RF gain to the maximum.
4. Enter the transmission and receiving frequency from the NBDP terminal.
Menu operation: [F3][9]: Set Frequency
“Occupied (NBDP)” appears in the RT display.
5. Set the “MODE” to ARQ and enter “ID” for the coast station. (Menu operation:
[F3][8]: Manual Calling)
6. Press [Enter]. “Cannel Busy Check. To forcibly transmit a call, press the ENTER
key.” appears. Check that the channel is not in use and press [Enter] to start calling.
7. When the coast station replays, the AAB is exchanged automatically, and the “GA+”
is received.
8. Type “TEST+” or “HELP+”.
9. The coast station automatically transmits the message.
10. The NBDP should receive the message normally. Press [F10] (Break) to stop the
communication.
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