Redbox Embedder/De-embedder User Handbook
33
4
R B - V H C M A 4
RB-VHCMA
4
Full Scale Setting
The analogue input full-scale settings, which determine the full-scale 0dBFS level for the
digital audio, are set internally via jumpers. They are factory set to +18dBu by default.
Full-scale Settings
Jumper
JP1
JP2
+12dBu
Not fitted
Not fitted
+18dBu
Fitted
Not fitted
+24dBu
Not fitted
Fitted
Analogue Audio Outputs
The RB-VHCMA4 has four analogue outputs grouped into a single de-embed bank.
These can be connected using balanced connections through the D-type connectors or
unbalanced connections through BNC connectors, all are available on the rear panel. The
balanced analogue outputs can be wired unbalanced by connecting non-phase (-) pin to
the ground pin for that output, and then connecting the audio signal to the phase (+) pin.
The two output types are connected internally, so please ensure that only one type of
connection is used per output.
Full Scale Setting
The analogue output full-scale settings, which determine the full-scale 0dBFS level for the
digital audio, are set internally via jumpers. They are factory set to +18dBu by default.
Full-scale Settings
Jumper
JP1
JP2
+12dBu
Not fitted
Not fitted
+18dBu
Fitted
Not fitted
+24dBu
Fitted
Fitted
Audio Input and Output Gain Adjustment
The default audio channel gain is unity. However, to accommodate lower or higher level
sources it is possible to introduce gain or attenuation on a per channel basis. Each audio
channel has an adjustable gain range from -24dBu to +24dBu in 0.5dB increments. This is
set using the remote Control ports. Once set, this value is stored and reloaded each time
the unit is powered on.
