D21m System
6.3.6

SDI I/O Card (,		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. Itcan 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 aneight-channel input and output card. These three modes are determined byDIP 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 canbe bypassed. When bypassed, the SDI card is fully compatible to transmitting
the Dolby® E audio format. If power is switched off, the input is hardwarebypassed to output A. If the SRCs are bypassed, the card works at a sampling
rate of 48 kHz only.				

,)A949.0442		
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-embedder + embedder)
HD: <800 µs; SD: <2.6 ms		Current consumption (5 V)
1A		
Operating temperature
0-40 °C		* Audio latency times are identical for all channels and all groups.
SDI Embedder/De-Embedder Module

PLL
48 kHzMaster Clk

Slave Clk

SD/HDThru

SDI
HW
BypassAudio In
Grp1&2/3&4

Test Pattern
Generator

8-of-16 Selector&
8-Ch Delay

TX

In ClkOut Clk

Audio In
Grp1&2/3&4

8 x SRC
BypassAudio Out
Grp1&2/3&4

Out Clk

In ClkAudio Out
Grp1&2/3&4

8 x SRC
Bypass16SD/HD
Out A
SD/HD
Out B

16Video

Backplane Connector

De-Embedder

RXSD/HD
InSettings

EmbedderStatusStatusSDIClkID

50

Document generated: 04.03.15

D21m System

F E DCBA

Default Setting:

ONDefault Setting:
4321

S1

S1
ONLEDsSDI LOCKDIP Switches

HD

Indicates a valid HD SDI signal at the input.

S1Switch
1
2
3
4

DIP Switch on SDI Module

Document generated: 04.03.15

Indicates a valid (HD or SD) SDI signal at the input.

Setting
OFF: Enable de-embedder (factory default)
OFF: Enable embedder (factory default)
OFF: SRC bypass (factory default)
reserved (must always be OFF)

Switch Setting
OFF: De-embedder groups 1&2 (factory default)A
ON: De-embedder groups 3&4
OFF: Embedder groups 1&2 (factory default)
B
ON: Embedder groups 3&4
ON: All audio data in SDI will be clearedC(factory default: OFF)
OFF: no delay (factory default)D
ON: 40 ms delay on all 8 SDI in channels
OFF: transparent for channel status bit
E
ON: generate channel status bit (factory default)
OFF: NTSC 525 test pattern is generated if no SDI input signal is present (factory default)
F
ON: NTSC 1080i60 test pattern if no SDI input signal is present51