Wordclocks; About Wordclocks; Wordclock Hookup Examples - Yamaha AD824 Owner's Manual

14
Chapter 6—Wordclocks

6 Wordclocks

About Wordclocks

For correct operation and analog-to-digital conversion, it's essential that the AD824 is
wordclock locked to the digital audio device connected to its SLOT output. The AD824
can generate a wordclock signal internally at either 44.1 kHz or 48 kHz, so it could be
used as the wordclock master, in which case the device connected to the SLOT would
be used as a wordclock slave. Alternatively, the AD824 can lock to an external wordclock
signal derived from its SLOT, or a wordclock signal received at the WORD CLOCK IN
connector.
See page 5 for information on selecting the wordclock source.

Wordclock Hookup Examples

In this example, the AD824
sources its wordclock signal
from its SLOT. Note that the
AD824 is transmitting digital
audio to the digital audio device
and deriving a wordclock signal
from it all down the same cable.
This works okay with AES/EBU
and Tascam TDIF-1 digital con-
nections, because a single cable is
all that's required to transmit
and receive digital audio. With
the ADAT format, however, sep-
arate optical cables are used to
transmit and receive, so in order
to transmit digital audio and
derive a wordclock signal, both
the ADAT IN and OUT on the
AD824 must be connected to the
digital audio device.
In this example, the AD824
sources its wordclock signal
from its BNC WORD CLOCK
IN connector.
AD824—Owner's Manual
Digital Audio Device
(DME32, 02R, D24, etc.)
Digital audio
AD824
WORD CLOCK PEAK
INTERNAL
NOMINAL
44.1kHz 48kHz BNC SLOT
SIGNAL
+48V
1 2 3 4
SEL
Wordclock source = SLOT
Digital Audio Device
(DME32, 02R, D24, etc.)
Digital I/O
Digital
audio
MY8-xx
AD824
WORD CLOCK PEAK
INTERNAL
NOMINAL
44.1kHz 48kHz BNC SLOT
SIGNAL
+48V
1 2 3 4
SEL
Wordclock source = BNC
Digital I/O
Wordclock
MY8-xx
PEAK GAIN
POWER
NOMINAL
dB
ON OFF
SIGNAL
+48V +48V MASTER
OFF ON
5 6 7 8
SEL
AD CONVERTER
Wordclock out
(BNC)
Wordclock
WORD CLOCK IN
PEAK GAIN
POWER
NOMINAL
dB
ON OFF
SIGNAL
+48V +48V MASTER
5 6 7 8 OFF ON
SEL
AD CONVERTER