Audio Input And Output Gain Adjustment; Automatic Dolby Detection & Smpte-337M Support; Rb-Vhcmd16 D-Type Pin-Out - Sonifex Redbox RB-VHDMA8 User Handbook Manual

The digital inputs are sample rate converted to 48kHz so that the audio is synchronous to
the video input signal. This can be disabled via a remote control option.
The digital outputs are always output at 48kHz and will be synchronous to the video signal.
No sample rate conversion is applied to the digital outputs.

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.
Automatic Dolby Detection & SMPTE-337M Support
Each digital input is sample rate converted by default so that it is synchronous to the
incoming video signal. But if a digital audio signal contains non-linear PCM data such as
Dolby E or Dolby Digital, then this process will corrupt the data and render it unusable.
In addition to this if any gain or attenuation is applied to this channel, the effect will be
similar. To provide support for these types of signals and any other non-audio data the
units will automatically detect non-audio data and bypass the SRC and gain sections as
soon as it is detected. This method relies on the channel status bits being correct, but
there is also an option to bypass the SRC on a per input basis regardless of the signal
content. The user must ensure that unity gain is applied through the gain section in this
case so that the data is passed through unaffected.
Note that for correct embedding of non-audio data, the digital audio input must be
synchronous to the video signal prior to the embedder unit.

RB-VHCMD16 D-type Pin-out

Pin No.
1
14
2
15
3
16
4
17
Redbox Embedder/De-embedder User Handbook
Function
I/O Bank 1
Digital 1 In+
Digital 1 In-
Digital 1 In Ground
Digital 1 Out+
Digital 1 Out-
Digital 1 Out Ground
Digital 2 In+
Digital 2 In-
R B - V H C M D 1 6
Function
I/O Bank 2
Digital 5 In+
Digital 5 In-
Digital 5 In Ground
Digital 5 Out+
Digital 5 Out-
Digital 5 Out Ground
Digital 6 In+
Digital 6 In-
5
49