© 2004 Wohler Technologies Inc. ALL rights reserved
19
AMP2-VSDA/AV
and
AMP2-VSDA/AM
User Manual P/N
821576
Rev-
B
The
919096
(
Serial Digital to AES Converter
) module allows selected Wohler Technologies audio monitoring systems to be
connected directly to a serial digital 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. The
919096
module demultiplexes (extracts) the audio data from the video data, reformatting it to the
AES
standard. A
companion digital-to-analog converter module (
919050
) is used to convert the
AES
signal to
Analog
audio.
In the
AMP Digital Series
units, channels 1 and 2 (first subgroup) and channels 3 and 4 (second subgroup) from
SDI Group ID
#1
are demuxed before being input to the
AES
to analog conversion module (
919050
). Access to
SDI Group ID #2
,
#3
, and
#4
is optional and should be specified at time of order.
SDI to AES Converter Module PCB (919096)
919096 Specifications
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:
AES data bits:
Error Indication:
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
20
Bi-color LED (red/green)
Off = no signal
Green = signal present
Red = Error
Section 3:
Technical Information
