Analogue I/O; System Block Diagram; Rb-Vhcma4 3G/Hd/Sd-Sdi Embedder & De-Embedder 4 Channel Analogue I/O; Fig 4-1: Rb-Vhcma4 System Block Diagram - Sonifex Redbox RB-VHDMA8 User Handbook Manual

4 RB-VHCMA4 3G/HD/SD-SDI Embedder & De-Embedder
4 Channel Analogue I/O
The RB-VHCMA4 is a 4 channel analogue de-embedder and a 4 channel analogue
embedder combined into a single 19-inch rack unit. The unit can selectively de-embed
up to 4 channels within any audio group of an SDI video signal, to any of the analogue
outputs. After which, the video becomes two independent paths where the audio groups
can be selectively deleted or passed through. The unit then embeds any of the 4 analogue
input channels to available groups within each of the two video paths, which are then sent
to the re-clocked SDI outputs.
The de-embedding and embedding channel routing is controlled via the front panel
buttons and indicators. There is also LED indication for SDI input status and audio group
presence.
The unit can be remote controlled via Ethernet or serial port connections using the Sonifex
SCi software.
It has a triple rate SDI receiver with automatic input rate detection and equalisation along
with two re-clocked and individually buffered SDI outputs. It supports the full range of 3G,
SD and HD standards from NTSC and PAL up to 1080p 60Hz.
There is independent level control for each analogue input and output channel, which can
be adjusted from -24dB through to +24dB in 0.5dB steps.
The analogue outputs have three full-scale gain settings which can be set via jumpers
situated inside the unit. Allowable settings are +12dBu, +18dBu and +24dBu reference
FSD Similarly, the analogue inputs full-scale gain settings can be set via jumpers inside
the unit. Allowable settings are +12dBu, +18dBu and +24dBu for FSD. The balanced and
unbalanced connections are paralleled, allowing one type to be used per input or output.

System Block Diagram

SDI
Receiver
Input
EQ
Analogue
Outputs
Balanced
De-embed
4
Channel
Bank
DACs
Unbalanced

Fig 4-1: RB-VHCMA4 System Block Diagram

Redbox Embedder/De-embedder User Handbook
Audio Audio
Group Detect Pass /Delete
SDI Audio Audio
De-embedder Pass /Delete
4
4
Channel
Level Routing
Control
R B - V H C M A 4
Audio SDI
Embedder Transmitter
CD
Audio SDI
Embedder Transmitter
CD
4
Embed
4 4
Channel Channel
Bank
Routing Level
ADCs
Control
4
SDI
Output 1
SDI
Output 2
Analogue
Inputs
Balanced
Unbalanced
27