Setting Up Muting Threshold Controls - Cisco D9854 Installation And Operation Manual

Setting up Muting Threshold Controls

To Set Up the Muting Threshold Controls
Proceed as follows to set up the muting threshold controls:
1. From the user interface of the D9854, click the Setup tab and then click the
Muting Thresholds icon from the sub-page.
2. The Control option allows you to mute the transport stream and audio in the
event of an unstable signal, poor signal or no signal condition (Enable or
Disable). The default is Enable.
3. The Transport Cutoff and Restore for both DVBS and DVBS2 Transport sets
how the receiver reacts when the signal quality is severely degraded when using
DVB-S or DVB-S2 modulation. This allows you to set the transport C/N margin
values for the receiver. The receiver uses these noise values/settings as limits
during normal operation to determine whether to mute the transport in the
event of a noisy signal, poor signal or no signal condition.
The Transport Cutoff is the lower limit for the transport C/N margin setting.
The transport will be muted when the C/N margin is below the Cutoff setting,
and un-muted (e.g., restored) when the C/N margin rises above the Restore
setting for a preset period of time. The adjustable operating range is from -2.0 to
20.0 dB. The default setting for Transport Cutoff is 0.0.
4021470 Rev D D9854 Advanced Program Receiver Installation and Operation Guide 5-61