4023074 Rev B Model D9858 Advanced Receiver Transcoder Installation and Operation Guide 4-79
Setup Menu: Noise Cutoff, Continued
Trnsprt LDPC (Low Density Parity Check) BER
Description: Sets how the transcoder reacts when the signal quality is severely
degraded when using DVB-S2 modulation. This allows you to set
the transport and audio bit error rate (BER) values for the
transcoder. The transcoder uses these noise values/settings as
limits during normal operation to determine whether to mute the
transport and/or audio in the event of a noisy signal, poor signal or
no signal condition.
Parameters: Cutoff - This is the upper limit for the transport BER setting. The
transport will be muted when the BER is above the Cutoff setting,
and un-muted (e.g., restored) when the BER falls below the Restore
setting for a preset period of time. The adjustable operating range is
from 1.0e-9 (1.0x10-9) to 9.99e-1. The default setting for Transport
(LDPC BER) Cutoff is 1.4.e-2.
Restore - This is the lower limit for the transport BER setting. The
transport will be muted when the BER is above the Cutoff setting,
and un-muted (e.g., restored) when the BER falls below the Restore
setting for a preset period of time. The adjustable operating range is
from 1.0e-9 (1.0x10-9) to 9.99e-1. The default setting for Transport
(LDPC BER) Restore is 1.30e-2.
Note: Muting Control must be set to Enable for these settings to be
active.
Transport Default LDPC BER Relationship
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