AYRE QA-9 - Manual (Page 12)

Word Clock Outputs (QA-9 Pro only)
To enable the word clock outputs at the rate
indicated on the front panel display, set the switch
to the position labeled “WCk En”. Switch position
“WCk Dis” will turn all the word clock outputs off.
DSD Output (QA-9 Pro only)
Three of the BNC output connectors can be
configured to output digital audio data in the
professional SDIF-2 or SDIF-3 DSD format. To
enable the 3-wire DSD output set the switch to
“DSD En”.
Enabling he DSD output
overrides the word clock output
settings for the three shared
BNC connectors and forces the
fourth to 44.1 kHz.
The front panel display will indicate “DSD” mode
with a red LED to the left of the numeric display.
The numeric display will then indicate the DSD
output rate, e.g., “128” (signifying the multiple of
the 44.1 kHz CD rate), as set by the three sample
rate selection switches in the table below:
4x/1x 2x/1x 48/44 Rate (x Fs) Format
Down Down Down 64 SDIF-2
Down Down Up 64 SDIF-3
Down Up Down 128 SDIF-2
Don’t Care Up Up 128 SDIF-3
Up Don’t Care Down 256 SDIF-2
SDIF-3 is not available at 256x.
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