Motorola MTP850, Service Manual

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TEST SETUP & TESTING 380–430MHz MTP850 TETRA Handportable Terminal / Basic Service Manual 5.1 - 13
28. Press any key again. The display shows “Chopper-Noise test TOP Mic to
PHF EAR”. Bind around the antenna one binding of the earpiece cable and
place the external earpiece close to your ear and listen for chopper noise.
Make sure chopper noise is not audible.
29. Press any key again. The display shows “Chopper-Noise test PHF Mic to Int
earp”. Bind around the antenna one binding of the earpiece cable and listen
for chopper noise at the radio earpiece. Make sure chopper noise is not
audible.
30. Press any key again. The display shows “Connect RSM - SIDE for the
following tests”. Press any key again. The display shows “Chopper-Noise test
RSM SIDE Connector MIC to INT ERP.” and listen for chopper noise at the
radio earpiece.
31. Press any key again. The display shows “Int Mic to Int earp Loopback Test
with UCM”. Speak into the bottom microphone, and you will hear your voice
via the earpiece.
Note: Tests 22-31 work also without UCM.
32. Press any key again. The display shows “Connect PHF for the following
Tests”.
33. Press any key again. The display shows “TOP Mic PHF ERP Loopback Test
with UCM”. Speak into the top microphone, and you will hear your voice via
the PHF earpiece
34. Press any key again. The display shows “PHF Mic to Int earp Loopback Test
with UCM”. Speak into the PHF microphone, and you will hear your voice via
earpiece.
35. Press any key again. The display shows “Connect RSM SIDE for following
Tests”.
36. Press any key again. The display shows “RSM side Mic to Int ear loopback
test with UCM”. Speak into the RSM microphone, and you will hear your
voice via earpiece.
37. Press any key again. The display shows “Chopper Noise INT MIC to INT
EAR with UCM”, and listen for chopper noise at radio earpiece. Make sure
chopper noise is not audible
38. Press any key again. The display shows “Connect PHF for the following
Tests”.
39. Press any key again. The display shows “Chopper-Noise TOP mic to PHF
EAR with UCM”. Bind around the antenna one binding of the earpiece cable
and place the external earpiece close to your ear and listen for chopper
noise. Make sure chopper noise is not audible.
40. Press any key again. The display shows “Chopper-Noise PHF mic to Int EAR
with UCM”. Bind around the antenna one binding of the earpiece cable and
listen for chopper noise at radio earpiece. Make sure chopper noise is not
audible
41. Press any key again. The display shows “Connect RSM SIDE for the
following tests”.