Nortel DualMode 800, Maintenance Manual

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11-16 DRU tests
411-2051-500 Draft 00.01 November 1999
SAT Frequency and Deviation tests
Supervisory Audio Tones (SAT) are used for out-of-band signaling. This test
ensures that the SAT frequency and deviation transmitted by the TRU are
within specifications.
Step Action Observation
1 Ensure that the TRU configurations are as
listed in Table 11-1 for the SAT Transmit test.
2 From the interface terminal, use the G
command to turn on the SAT.
>G
The screen shows:
SAT TX: 6000 (on)
3 Check the SAT frequency as displayed on
the AF (frequency) meter. SAT frequency should be 6000 Hz
±
5 Hz.
4 Check the SAT carrier frequency deviation as
displayed on the deviation (DEV) meter. Deviation between 1.8 kHz and 2.2 kHz.
5 Record the frequency and the deviation on
the test forms.
6 Use the H command to input a different SAT
frequency.
>H
The terminal will prompt with:
Enter a SAT frequency (5970,
6000, or 6030)
7 Select 5970 Hz SAT frequency by entering:
>5970
The screen shows:
SAT TX: 5970 (on)
8 Repeat steps 3 to 5 for the 5970 Hz SAT
frequency and deviation tests. SAT frequency: 5970 Hz
±
5 Hz
Deviation between 1.8 kHz and 2.2 kHz.
9 Repeat steps 6 to 8 for the 6030 Hz SAT
frequency and deviation tests by selecting
6030 Hz SAT frequency. SAT frequency: 6030 Hz
±
5 Hz
Deviation between 1.8 kHz and 2.2 kHz.
10 Use the G command to turn off the SAT.
>G
The screen shows:
SAT TX: 6030 (off)