Sailor C4951WP Operating And Installation Instructions - page 30
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8.4
How to check VHF signal reception –
VHF receiver and handset RX AF circuits
Proceed as follows for each control unit.
Test setup
Result expected
1.
All handsets on their rests
There is static noise – a background hissing – from all the control unit speakers.
(VHF display) with squelch
If nothing can be heard, switch the speaker on and turn up the volume.
thresholds set to zero.
8.5
How to check the TX/RX DSC mode
To test the system’s DSC functionality, two test calls must be made –
an INTernal test and an EXTernal test.
Internal test
In this test, the call is looped back internally, not via the transmitter
or receiver. The test controls the DSC modem in the transceiver RX
and TX internally.
1.
Lift the handset.
2.
Press Shift, Func to display TELEPHONY.
3.
Press up arrow once to display DSC.
4.
Press right arrow once to display SETTINGS.
5.
Press down arrow twice to display TESTCALLS.
6.
Press right arrow once to display INT PATH.
7.
Press right arrow once to display SENDCALL.
8.
Press Send Call key.
9.
The display will rapidly show, in sequence, TX-CALL, TX-OK.
10. The call is announced by the DSC modem. Read the call info in
RX-LOG.
External test
In this test, the call is transmitted and received via the aerials. The
test also controls the transmitter and receiver circuits.
1.
Lift the handset.
2.
Press Shift, Func to display TELEPHONY.
3.
Press up arrow once to display DSC.
4.
Press right arrow once to display SETTINGS.
5.
Press down arrow twice to display TESTCALLS.
6.
Press right arrow twice to display EXT PATH.
7.
Press right arrow once to display SENDCALL.
8.
Press Send Call key.
9.
The display will rapidly show, in sequence, TX-CALL, TX-OK.
10. The call is announced by the DSC modem. Read the call info in
RX-LOG.
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Installation - Control Unit
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