Nortel DualMode 800, Руководство по обслуживанию

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11-36 DRU tests
411-2051-500 Draft 00.01 November 1999
ST detect test
This test ensures that the DRU meets the minimum requirement of detecting a
Signaling Tone signal.
13 Reduce the level of the RF signal until a “N”
is indicated at the RX SAT status on the
screen. The RX SAT status on the screen shows:
RX SAT: N
14 Check the RF signal level on the
communications monitor. The RF signal level must be:
less than -105 dBm
15 Record the RF signal level on the test forms.
- End -
Step Action Observation
1 Ensure that the DRU configurations are as
listed in Table 11-1 for the ST detect test.
2 Use the P command to query the ST signal.
>P
The DRU will prompt for the signal to query:
Enter R, SAT, ST, or A
3 Enter the “ST” option to query the ST signal.
>ST
The RX ST status shows:
N
The output message shows:
continuing Query..(hit return
to exit)
4 Using the communications monitor, apply a
-90 dBm on-channel RF signal modulated
with a 10 kHz tone at
±
7.2 kHz deviation to
the DRU under test.
The RX ST status on the screen should
show:
RX ST: Y
5 Reduce the level of the RF signal until a “N”
is indicated at the RX ST status on the
terminal screen. The RX ST status on the screen shows:
RX ST: N
6 Check the RF signal level on the
communications monitor. The RF signal level must be:
less than -105 dBm
7 Record the RF signal level on the test forms.
8 Press the “Return” key from the terminal to
discontinue the measurement. The output message will show:
Query Status is OFF
Step Action Observation