Junger Audio C8491 - Compact Card - Manual (Page 13)

digital audio
modular
processing system
C8000
3G/HD/SD-SDI – DSP 4/8/16 audio channels
C8491
page 13/21
DSP 1B – 4 x 2 mode
The C8491 offers the feature to use pairs of channels in a fail over mode. I.e. if the audio signal fails in
the first audio pair, the processor may switch over to the adjacent (e.g. 1/2 >> 3/4) pair automatically.
The functions of the circuits Failover A – Failover B are similar.
The switch over will be performed by a cross fade.
Failover A
Mode [Primary / Secondary / AUTO]
selection between both inputs and the auto mode.
Dual Mono [off / auto]
if the fail over input is fed by a dual mono signal, the circuit may
automatically copy the opposite one if one fails
Fail Threshold [-60 … -40 dBFS]
trigger threshold for the fail detector
Fail Wait [1.5 … 10.0 sec.]
time from detection of an audio loss to the moment of switch over
Fail Return [0.0 … 10.0 sec.]
time from the detection of an audio return to the moment of switch
back
Side Chain Filter [on / off]
a high pass filter (300 Hz) and a low pass filter (3000 Hz) is applied to
the detector side chain (not the audio path) to prevent hum and noise
from blocking fail over switching.