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ATSC/DVB-3/SDI User Manual P/N 821557 Rev-A
The Serial Digital Interface (SDI) to AES/EBU Converter PCB (919096) allows selected Wohler Technologies audio monitoring
systems to be connected directly to an SDI video signal containing embedded audio. Two levels of component signals (eg., D1, D5,
and Digi Betacam type) are currently supported; synchronous audio at 48 KHz with either 20-bit data packets or audio and extended
data packets.
In the ATSC/DVB-3/SDI model, the 919096 demultiplexes (extracts) the audio data from the video data, reformatting it to the AES/
EBU standard which is then processed by the ATSC Digital Decoder PCB (919129) converting the AES/EBU signal to Analog
audio.
A front panel 4-position rotary switch selects between SDI Group 1, 2, 3, or 4. A front panel 2-position toggle switch selects channels
one and two (first subgroup) or channels three and four (second subgroup) from whichever SDI Group is selected for demuxing.
Input characteristics:
Receiver type:
Sensitivity performance:
SDI input level:
Input formats:
Audio sampling rate:
SDI output type:
SDI output:
SDI output level:
AES from SDI output level:
AES data bits:
Error Indication:
SDI to AES/EBU PCB (919096) Description
General Technical Observations
919096 Specifications
75 Ohm (BNC), AC coupled, 15 dB minimum return loss, 10-270 MHz
Auto equalizing with clock regeneration
Tolerates cable loss of at least 30 dB @ 135 MHz
400 - 1000 mV
Component, either 525 or 625 lines w/ 48 KHz audio
48 KHz
Fully regenerated copy of SDI input signal (equalized and regenerated,
scrambled NRZI)
15 dB minimum return loss, risetime 0.75-1.5 ns (20-80%)
800 mV +/-10%
75 Ω (BNC) unbalanced, risetime 5-30 ns (10-90%)
20
Bi-color LED (red/green)
Off
= no signal
Green = signal present
Red
= Error
© 2003 Wohler Technologies Inc. ALL rights reserved
Section 3: Technical Information
19
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