Yamaha CBX-D5 Operating Manual page 35

The following table shows how the WORD CLK IN/OUT connections work with each
word clock source. Word clock connections use coaxial BNC to BNC type cables.
WORD CLOCK
SOURCE
Outputs a word clock signal at the internal clock rate
AES/EBU Input
(REC FREQ).
Outputs a word clock signal at the internal clock rate
CD/DAT Input
(REC FREQ).
Outputs a word clock signal at the internal clock rate
Y2 Input
(REC FREQ).
Outputs a word clock signal at the internal clock rate
Internal Clock
(REC FREQ).
Outputs a word clock signal at the same rate as the
WORD CLK IN
word clock at the WORD CLK IN.
If, for some reason the external word clock source should become disconnected or the
CBX-D5 cannot synchronize to it, the CBX-D5 will automatically switch to internal clock.
When the digital output signal is synced to an external word clock, the exact sampling
frequency cannot be guaranteed. So the sampling frequency specified in the digital
output's channel status bits may be different to the actual output sampling frequency.
In the following example, data from the four CBX-D5 channels are being transferred to a
digital mixer, which is also connected to a Yamaha DRU8 8-Track Digital Recorder. The
DRU8 is word clock master supplying both the CBX-D5 and the DMC1000 Digital Mixer.
In this system, the external word clock connections are essential.
WORD
CLK OUT
CBX-D5
WORD
CLK IN
WORDCLOCK SLAVE
(WORD CLK IN)
DRU8 DIGITAL
RECORDER
WORDCLOCK MASTER
(Internal clock source)
In this example, audio data from two DAT recorders is being mixed via a digital mixer.
DAT No. 1 does not have any word clock connections, so the digital audio is fed to the
CBX-D5 first, then to the digital mixer. The CBX-D5 generates a word clock signal based
on the data from DAT No. 1 and feeds this signal to DAT No. 2, which syncs to the external
wordclock. The digital mixer derives its word clock from the AES/EBU inputs.
DAT No. 1
(no wordclock
connections)
CBX-D5
(synced to
AES/EBU input)
DAT No. 2
(synced to external
wordclock)
CBX-D5 WORD CLK OUT
AES/EBU 1/2 OUT
AES/EBU 3/4 OUT
A Yamaha format connection
that can carry up to 8 digital
signals
AES/EBU
AES/EBU
WORD CLOCK
AES/EBU
WORD CLK IN/OUT WORD CLK IN/OUT WORD CLK IN/OUT
CBX-D5 WORD CLK IN
N/C
N/C
N/C
N/C
Receives the external word
clock
WORD CLK IN
AES/EBU IN
AES/EBU IN
DMC1000
DIGITAL MIXER
WORDCLOCK SLAVE
(wordclock sourced from
the WORD CLK IN
connectionl)
DIGITAL MIXER
(synced to
AES/EBU inputs)
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