11-26
DRU tests
411-2051-500
Draft
00.01
November 1999
Receive audio level test
This test ensures that the receive audio level of the DRU is compatible with
the Mobile Telephone Exchange (MTX) network in the AMPS mode. The
AMPS mode of the DRU is currently set to a default value of -18 dBm0,
corresponding to
±
2.9 kHz deviation.
Step
Action
Observation
1
Ensure that the DRU configurations are as
listed in Table 11-1 for the Receive and
Transmit Audio Line Sensitivity test.
Note:
SAT TX must be set to off in this test.
Use the G command to set SAT TX to off, if
necessary.
2
Use the J command to turn RF loopback on.
Use the R command to unmute TX RX audio.
Use the C command to turn PA carrier on.
Loopback field shows:
RF
Audio status field shows:
TX RX
PA status field shows:
ON
3
Using the communications monitor, apply a
-60 dBm on-channel RF signal modulated
with a 1 kHz tone at
±
2.9 kHz deviation to the
DRU under test.
4
Check the frequency deviation on the
transmit side of the DRU under test.
The deviation must be:
between 2.60 kHz and 3.20 kHz.
5
Record the deviation on the test forms.
Step
Action
Observation
1
Ensure that the DRU configurations are as
listed in Table 11-1 for the RX Audio Level
test.
2
Use the C command to turn PA carrier off.
Use the J command to turn RF loopback off.
PA status field shows:
OFF
Loopback field shows:
OFF
3
Use the R command to turn on the RX audio.
>R
The DRU will prompt for the audio path:
Enter TX, RX, BOTH, or OFF
- continued -
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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