Date printed: 24.01.12
48
D21m System
6.3.6 SdI I/O Card
(
and
) A949.0442
The HD/SD SDI (serial digital interface) embedder/de-embedder card is able
to handle video signals according to the SD as well as the HD standard. It
can act as an eight-channel embedder, an eight-channel de-embedder, or as
a combination of the two. Therefore, for the D21m I/O system it may act as
an eight-channel audio input card, an eight-channel audio output card, or an
eight-channel input and output card. These three modes are determined by
DIP switches located on the card.
The SDI standard defines up to 16 audio channels transmitted within a video
signal. These 16 channels are divided into four groups of four channels each.
The user can select which two groups are to be embedded or de-embedded by
DIP switches on the card: either groups 1&2, or groups 3&4. It is also possible
to clear the SDI data structure possibly present in the incoming video signal
and to allocate the groups from scratch.
The D21m SDI card hosts sampling rate converters for both the audio inputs
(de-embedding) and outputs (embedding). So the mixing console can run
independent of the video sync used for SDI. The sampling rate converters can
be bypassed. When bypassed, the SDI card is fully compatible to transmitting
the Dolby® E audio format. If power is switched off, the input is hardware-
bypassed to output A.
If the SRCs are bypassed, the card works at a sampling
rate of 48 kHz only.
Operating modes
8-ch console output (embedder) and/or
8-ch console input (de-embedder)
Selectable SDI groups
1&2, or 3&4
Connectors
IN, OUT A, OUT B, THROUGH (BNC, 75
Ω
)
Cable length
max. 50 m
Audio latency*
(de-em embedder)
HD: <800 µs; SD: <2.6 ms
Current consumption
(5 V)
1 A
Operating temperature
0-40 °C
*
Audio latency times are identical for all channels and all groups.
SD/HD
In
PLL
48 kHz
8 x SRC
8 x SRC
Settings
Status
De-Embedder
8-of-16 Selector
&
8-Ch Delay
Embedder
TX
RX
Video
SDI
HW
By-
pass
16
16
Master Clk
Audio In
Grp1&2/3&4
Bypass
In Clk
Out Clk
Out Clk
In Clk
Bypass
Audio Out
Grp1&2/3&4
Status
Clk
SDI
ID
Audio In
Grp1&2/3&4
Audio Out
Grp1&2/3&4
Slave Clk
Test Pattern
Generator
SD/HD
Thru
SD/HD
Out A
SD/HD
Out B
SDI Embedder/De-Embedder Module
Backplane Connector