E-Mu 1212M Owner's Manual page 123

House Sync
Generator
A master word clock generator is preferable for larger digital setups.
Word Clock In: Receives word clock (sample clock) from another digital device such as
a digital video deck, digital recorder or digital mixer.
Word Clock Out: Sends word clock (sample clock) to another digital recorder. Word
clock is always output, whether it is generated by the internal clock or passed through
from the word clock input.
75Ω On/Off: Termination for the word clock input can be switched on or off in the
Sync Card menu of the PatchMix DSP application. Normally word clock termination
should be left on. If you have problems with a weak word clock signal, try turning termi-
nation off. See Word Clock
The diagram below shows the proper way to connect and terminate a serial word clock
chain. Using a BNC "T" connector ensures that word clock is precisely in phase for both
devices. The middle device has termination turned Off and the last device in the word
clock chain has termination turned On.
ADAT Optical
or AES Digital
E-MU 1010 CARD
SYNC CARD
This diagram shows the proper way to connect word clock if you don't have a multi-output
word clock generator. The last device in a Word Clock chain should have Termination ON.
E-MU 1820M/1820/1212M PCI Digital Audio System
Digital
Device 1
Digital
Device 2
Termination.
Digital Mixer
ADAT Optical
Word Clock Termination OFF
AES
Word Clock Termination ON
Digital
Device 3
Digital
Device 4
Word Clock
T - connector
IN
IN
7 - Appendix
Word Clock In/Out
123