NTi Audio Digilyzer DL1 - Manual (Page 53)

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