User Guide
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To synchronize to an external word clock signal:
1. Connect the word clock signal to the BNC input on the 688’s back panel.
2. Press the MENU button.
3. Turn and press the Headphone encoder to select TIMECODE/SYNC > Sync
Reference.
4. Set the sync reference to Word Clock.
When the 688 is locked to external word clock, it is indicated by WCK in yellow
text at the bottom of the Main screen.
Wordclock value
If no valid external word clock is present, the word UNLOCK blinks yellow and
red on the Main screen.
L
During playback, the 688 ignores any external word clock source and only uses its
own internal word clock.
Setting Word Clock Sensitivity
A menu option is available on the 688 letting you adjust the sensitivity of the
word clock input to allow the mixer to work with word clock sources of lower
voltage amplitude.
To set the sensitivity:
1. Press the MENU button.
2. Select the Timecode/Sync > Word Clock Sensitivity. Options include: High
(no termination) or Low (75 ohm termination). By default, sensitivity is set
to High.
