User manual

8X96 ADC and DAC User Manual Page 35 of 54
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During normal operation, the digital signal is present at both the AES outputs and the
output of the optional DIO cards.
The AES/EBU interface will pass through (from its inputs to outputs) even 4
asynchronous signals. The format conversion, however, requires pairs to be synchronous
as only the clock of pair #1/2 is used for format conversion. If less than 4 pairs are used,
at least one pair should be feeding channels #1/2.
For example: if you need to record a stereo AES/EBU signal on your eight channel MDM
machine on tracks #7/8 only, feed the signal to input #1/2 and the loop the AES output
#1/2 to the AES input #7/8. Arm only tracks #7/8 and you are ready to go.
The converters need a sampling clock of any frequency between 25-100 kHz. The
circuitry inside is divided into two ranges: 25-50kHz and 50-100kHz. The “Sampling”
switch has to be always set to x1 (Regular) for the lower range and x2 (Hi-speed) for the
higher range.
No sample rate conversion or noise shaping is performed during D-D format
conversion.