User Manual
03D Applications 59
Yamaha 02R & 03D Applications Guide
03D
Wordclock Connections & Termination
For correct operation it is essential that the wordclock cabling be terminated correctly. The
03D has a wordclock termination ON/OFF (75Ω) switch on the rear panel. Wordclock is a
TTL signal, and IN and OUT connections use BNC connectors. Three wordclock
distribution examples are shown below. Note the 75Ω wordclock terminator switch
settings.
1. Parallel Distribution Box
In this example, a parallel distribution box is used to distribute the wordclock signal among
devices. All wordclock terminator switches are set to ON.
2. Using BNC T-bar Connectors
This example is similar to the above except that T-bar connectors are used. In this system,
only the last device’s wordclock terminator switch is set to ON.
3. Daisy Chain Distribution
In this example, the wordclock master is a digital multitrack recorder. Both 03D wordclock
terminator switches are set to ON. This method of wordclock distribution is not
recommended for large systems.
03D-A
75Ω Switch=ON
03D-B
75Ω Switch=ON
Other
Device-A
75Ω Switch=ON
Other
Device-B
75Ω Switch=ON
WORDCLOCK
OUT
WORDCLOCK IN WORDCLOCK IN WORDCLOCK IN WORDCLOCK IN
Distribution box
03D-A
75Ω Switch=OFF
03D-B
75Ω Switch=OFF
Other
Device-A
75Ω Switch=OFF
Other
Device-B
75Ω Switch=ON
WORDCLOCK
OUT
WORDCLOCK IN WORDCLOCK IN WORDCLOCK IN WORDCLOCK IN
03D-A
75Ω Switch=ON
IN OUT
03D-B
75Ω Switch=ON
WORDCLOCK
OUT
WORDCLOCK
IN OUT
WORDCLOCK