DRU receive tests
11-27
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
RSSI test
The RSSI (Receive Signal Strength Intensity) is the RF signal strength used
by the DRU for signal monitoring. This test ensures that the RSSI
characteristics of the DRU under test are within specifications. Due to the
transceiver splitter and shelf cable losses, the RSSI reading is 11 dB lower
than the test signal applied.
4
Enter the “RX” option to turn on the RX
audio.
>RX
The Audio status on the screen shows:
Audio: RX
5
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.
6
This step is performed at the MTX.
From the MAP position or with a second
terminal logged into the switch the trunk that
is assigned to the DRU being tested, enter:
MAPCI;MTC;TRKS;TTP;POST
(CLLI name)
(Trunk member number)
;LOSS
MAP Trunk Test Position is displayed. The
MAP screen will indicate the trunk member
selected and that the trunk is seized.
It will also indicate the tone received and the
level of the tone.
7
Check the level received at the switch as
displayed on the MAP position terminal.
Level must be:
between -17.0 dBm and -19.0 dBm.
8
Record the audio level on the test forms.
9
If the level is different from the site specific
Reverse audio level setting, repeat this test
after all the receive tests have been
completed. Set the level to the specific
operational level with the T command from
the interface terminal.
The receive audio level is shown on the
terminal screen as:
Audio Sens Rx: -18.0
(change this
level as required—a change of 1 dBm is
approximately a change of 0.27 kHz in
deviation)
10
Use the R command to turn off the RX audio.
>R
The DRU will prompt for the audio path:?
Enter TX, RX, BOTH, or OFF
11
Enter the “OFF” option to turn off the RX
audio.
>OFF
The Audio status on the screen shows:
Audio: off
- End -
Step
Action
Observation
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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