Digilyzer DL1 User Manual
Digilyzer DL1 User Manual
Digilyzer DL1 User Manual
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8. AppeNdIx<br />
1C2f Format<br />
The AES3 standard includes the following two options for 96 kHz<br />
sample rate operation:<br />
• To double the frame rate from the previous 48 kHz to 96 kHz<br />
(not possible for older equipment). This is the normal operation<br />
of the <strong>Digilyzer</strong>.<br />
• Using the two sub-frames (two channels) of a 48 kHz frame<br />
rate AES3 signal to carry consecutive samples of a mono signal<br />
resulting in a 96 kHz sample rate stream. The samples of one<br />
96 kHz signal are packed “interleaved” into two 48 kHz signals.<br />
This allows older equipment, which transmitters and receivers<br />
are not rated for 96 kHz frame rate operation, to handle 96 kHz<br />
sample rate information.<br />
This mode is called “single channel double frequency mode” or<br />
“double wire mode” (two AES3 cables are needed for stereo).<br />
The <strong>Digilyzer</strong> also enables measurements in this mode. Just<br />
select the input format 1C2f and the input channel menu will<br />
indicate “A i B” (or eg. “1 i 2” for ADAT). This indicates that<br />
channel A and B are used in an interleaved manner (1C2f<br />
mode).<br />
Appendix<br />
Fig 8-01, 1C2f selection<br />
The <strong>Digilyzer</strong> is specified for samples rates up to 96 kHz, so for<br />
a 1C2f signal the resulting sample frequency shall not exceed<br />
this value.<br />
53<br />
A and B are<br />
interleaved