An internal loop is constructed when the modulator and demodulator are connected internally, then a preset
test message is transmitted. Both the transmitted and received messages are printed out, as shown below, in
order to confirm that both messages are the same.
If the printer is not connected, confirm the received message via the display.
MODEM LOOP TEST
Format : INDIVIDUAL
Address : xxxxxxxxx
Category : ROUTINE
Telecommand-1 : J3E TEL
Telecommand-2 : NO INFORMATION
Work TX/RX freq : 12,346.5kHz/12,346.5kHz
End of sequence : EOS
Tx frequency : . kHz
Tx date&time : 06.Sep.2001(Thu) 01:26
RECEIVED MESSAGE
RX date&time : 06.Sep.2001(Thu) 01:26
Format : INDIVIDUAL
Address : xxxxxxxxx
Category : ROUTINE
Telecommand-1 : J3E TEL
Telecommand-2 : NO INFORMATION
Work TX/RX freq : 12,346.5kHz/12,346.5kHz
End of sequence : EOS
Rx frequency : . kHz
Example: Printer Output
ATTENTION
If this test cannot be performed correctly, and the printer operation is normal,
there is a possibility of a malfunction with the internal main PC board.
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