Service manual

38
1. Select
, then tap
PGM
.
2.
displays. Press
↓↓
or
↑↑
.to display any of the following items:
3. Refer to one of the following paragraphs for further information on the item that you select.
Filtering
Filtering lets you add a 19.2 kHz notch filter to one or more audio sources. This can be useful in a few
cases when the keypanel data port signal is being heard in the audio line due to cable routing problems.
1. Select
, then tap
PGM
.
2.
displays. Press
↓↓
or
↑↑
.to display any of the following items:
3. Tap
PGM
.
4.
→
displays to indicate that no filtering is selected.
5. Press
↓↓
.
6.
displays.
7. Press
PGM
.
8.
→
displays. The arrow indicates that the notch filter is now selected.
9. Tap
CLR
to exit.
10. Run "Service Menu, Save Cfg", page 44, to save the change.
Gating
Gating minimizes or eliminates background noise problems by shutting off an audio source when the sound
level drops below a certain threshold.
1. Select
, then tap
PGM
.
2.
displays. Press
↓↓
or
↑↑
.to display any of the following items: