DiGiCo SD9 - Manual (Page 18)

SD9 - Getting Started
1-13
1.7 Audio Sync
The SD9 operates a Sample Rates of either 48000Hz (48kHz) or 96000Hz (96KHz).
By default, it is set to clock internally (as a Master) and the Sample rate is determined by your selection in the Session Structure panel.
Within a normal setup, the SD9 will usually remain as clock master. However, there are times when the SD9 needs to be clocked
externally. The Audio Sync panel allows you to control external synchronisation.
To access the Audio Sync Panel, touch the Setup Menu button, followed by Audio Sync. The following panel will open:
The SD9 will clock from the following sources : Word Clock, CAT5#1, CAT5#2 and MADI 3
Note : When a valid clock is detected on an external sync input, the corresponding Green OK box will light, even if that input is not
selected as the clock source for the SD9.
The second picture above shows an example of External Clocking : Word Clock @ 48kHz
Note: If the console has an Optocore board fitted, an Optocore Sync option will also be available.
If the console is connected to an Optocore system then the Audio Sync should normally be set to Optocore if no external clock
source is required.