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Redbox Embedder/De-embedder User Handbook
RB-VHDMA
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R B - V H D M A 8
2
2 RB-VHDMA8 3G/HD/SD-SDI De-Embedder, 8 Channel
Analogue
Outputs
The RB-VHDMA8 is an 8 channel analogue de-embedder contained in a single 19-inch
rack unit. The unit can selectively de-embed up to 8 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
and then sent to the re-clocked SDI outputs.
The de-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,
HD and SD standards from NTSC and PAL up to 1080p 60Hz.
There is independent level control for each analogue 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
inside the unit. Allowable settings are +12dBu, +18dBu and +24dBu reference FSD. The
balanced and unbalanced output connections are paralleled, allowing one type to be used
per output.
System Block Diagram
Fig 2-1: RB-VHDMA8 System Block Diagram
Analogue
Outputs
Balanced
Unbalanced
Bank 1
DACs
Bank 2
DACs
Channel
Routing
8 Channel
Level
Control
SDI
Input
SDI
Output 2
SDI
Receiver
Audio
De-embedder
SDI
Transmitter
Audio
Pass /
Delete
EQ
CD
Audio
Group
Detect
SDI
Transmitter
Audio
Pass /
Delete
SDI
Output 1
CD
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