Terminating Bnc Wordclock Distribution - Yamaha D24 Owner's Manual

Terminating BNC Wordclock Distribution

When a wordclock signal is distributed via BNC cables, it must be terminated correctly.
Termination is typically applied at the last device, although it depends on the distribu-
tion method being used. The D24's WORD CLOCK 75 TERM/THRU switch allows
the D24 to be connected in a variety of ways. The following examples show three ways
in which a wordclock signal can be distributed and how termination should be applied.
Wordclock Distribution Box
In this example, a dedicated wordclock distribution box is used to supply a wordclock
signal to each device individually. Termination is applied at each device.
Wordclock
master
WC IN (BNC)
Device-A
Termination = ON
Wordclock slave
Bus Distribution
In this example, the wordclock signal is distributed via a common bus. Termination is
applied at the last device only.
Wordclock
master
WC OUT (BNC)
WC IN (BNC)
Device-A
Termination = ON
Wordclock slave
Daisy Chain Distribution
In this example, the wordclock signal is distributed in a daisy-chain fashion, with each
device feeding the wordclock signal on to the next device. Termination is applied at the
last device only. This method of distribution is not recommended for larger systems.
Wordclock
master
WC OUT (BNC)
WC IN
(BNC)
Device-A
Termination = OFF
Wordclock slave

Terminating BNC Wordclock Distribution

WC OUT
Wordclock
distribution box
(BNC)
WC IN (BNC)
Device-B Device-C
Termination = ON Termination = ON
Wordclock slave Wordclock slave
WC IN (BNC)
Device-B Device-C
Termination = ON Termination = ON
Wordclock slave Wordclock slave
WC OUT WC IN
(BNC) (BNC)
Device-B
Termination = OFF
Wordclock slave
WC IN (BNC) WC IN (BNC)
Device-D
Termination = ON
Wordclock slave
WC IN (BNC) WC IN (BNC)
Device-D
Termination = ON
Wordclock slave
WC OUT WC IN
(BNC) (BNC)
Device-C
Termination = ON
Wordclock slave
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