DRU transmit tests
11-17
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
Residual Modulation test
This test ensures that the transmit carrier deviation of the TRU is within
specifications when the transmit audio of the TRU is muted.
Transmit Audio Level test
This test ensures that the transmit carrier deviation of the TRU meets the
audio level specifications during a subscriber conversation in the AMPS
mode.
The AMPS mode of the TRU is currently set to a default value of -18 dBm0,
corresponding to
±
2.9 kHz deviation, which is compliant to IS-138 Standards.
Step
Action
Observation
1
Ensure that the TRU configurations are as
listed in Table 11-1 for the Residual
Modulation test.
2
Check the carrier frequency deviation as
displayed on the DEV meter.
Deviation between -0.5 kHz and +0.5 kHz.
3
Record the deviation on the test forms.
Step
Action
Observation
1
Ensure that the TRU configurations are as
listed in Table 11-1 for the Transmit Audio
Level test.
Note:
Loopback and SAT TX must be set to
off in this test. Use the J and the G
commands to set Loopback and SAT TX to
off, if necessary.
The desired trunk should still be posted as in
the Tx Audio Level Test step 4.
2
From the interface terminal, use the R
command to turn on (unmute) the TX audio.
>R
The terminal will prompt for audio path:
Enter TX, RX, BOTH or OFF
3
Enter the option “TX”:
>TX
The Audio status on the screen shows:
Audio: TX
- continued -
Summary of Contents for DualMode 800
Page 2: ......
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Page 6: ...vi Publication history Nortel Networks Confidential 411 2051 500 Draft 00 01 November 1999...
Page 82: ...2 20 Periodic maintenance 411 2051 500 Draft 00 01 November 1999...
Page 90: ...3 8 Test equipment and precautions 411 2051 500 Draft 00 01 November 1999...
Page 100: ...5 6 Master Oscillator tests 411 2051 500 Draft 00 01 November 1999...
Page 106: ...6 6 Antenna and transmission line tests 411 2051 500 Draft 00 01 November 1999...
Page 116: ...8 4 Alarm Control Unit ACU tests 411 2051 500 Draft 00 01 November 1999...
Page 138: ...10 2 ICRM tests 411 2051 500 Draft 00 01 November 1999...
Page 200: ...12 10 Enclosure maintenance 411 2051 500 Draft 00 01 November 1999...
Page 208: ...A 8 Appendix A Frequency table 411 2051 500 Draft 00 01 November 1999...
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