Yamaha O2R Owner's Manual page 280

180 Installing Options
Digital Recording Console 02R User's Guide
Wordclock Selection
1. Power on your AES/EBU compatible multitrack digital recorder
and then the 02R.
It is always important to observe the correct order for powering up
equipment in a studio. Start with the AES/EBU compatible
multitrack and mastering recorders and the signal processors, then
the 02R, and finally the monitoring amplifiers and other
downstream gear.
2. Press the (DIGITAL I/O) button until the "Word Clock Select"
screen appears.
If the card was installed properly, the system software should
correctly identify it in the appropriate slot. The AES/EBU digital
I/O card (CD8-AE) can only be installed in SLOT1 or SLOT2.
3. Use the CURSOR buttons to select the wordclock source.
If your AES/EBU compatible multitrack digital recorder has a
dedicated wordclock output connector, use the CURSOR buttons to
select the W.CLK IN box and press the [ENTER] button. If the
multitrack digital recorder does not have a dedicated wordclock
output, select the TARE l/2 box - the first box in the SLOT1 row -
and press the [ENTER] button.
4. When you select the wordclock source, the appropriate icon
should be inverted in reverse video.
See "Word Clock Select" on page 154 of the User's Guide for further
details.