DRU transmit tests
11-15
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
Transmit Carrier Frequency test
This test ensures that the TRU is transmitting at the assigned frequency.
Wideband Modulation test
This test ensures that the transmit carrier deviation of the TRU is within
specifications when the TRU is transmitting wideband data.
Step
Action
Observation
1
Ensure that the TRU configurations are as
listed in Table 11-1 for the Transmit Carrier
Frequency test.
2
Check the transmit carrier frequency on the
communications monitor. The frequency
error (FREQ ERR) is also shown on some
communications monitors.
±
220 Hz of the assigned frequency.
3
Record the assigned frequency (in MHz) and
the frequency error (in Hz) on the test forms.
Step
Action
Observation
1
Ensure that the TRU configurations are as
listed in Table 11-1 for the Wideband
Modulation test.
2
From the interface terminal, use the L
command to select Wideband Data.
>L
TRU begins to transmit wide band data and
the screen shows:
continuing Wideband Data TX..
(press return to quit)
3
Check the carrier frequency deviation as
displayed on DEV (deviation) meter.
Deviation between 7.2 kHz and 8.8 kHz.
4
Record the deviation on the test forms.
5
Press the “Return” key to stop the wideband
data transmission.
TRU stops transmitting wide band data and
the screen shows:
Wideband data is off
Summary of Contents for DualMode 800
Page 2: ......
Page 4: ......
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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