Wordclock Connections 123
D24—Owner’s Manual
exactly half that of the sampling rate, and each AES/EBU format digital I/O signal is
split in two, requiring two transmission channels. See “Dual AES/EBU Mode” on page
123 for more information.
In a system where all devices share a common wordclock, it’s important that all devices
be turned on even if they’re not being used. Turn on the wordclock master device first,
and then the slave devices. When shutting down the system, turn off the slaves first, and
then the master. Before recording, make sure that the wordclock slave devices are cor-
rectly locked to the master device. Most devices have front panel indicators, similar to
the LOCK indicator on the D24, to show when they are wordclock synchronized. Refer
to the relevant owner’s manuals for more information.
When the wordclock source or recording resolution is changed, or a project with a dif-
ferent sampling rate or recording resolution is selected, lower the volume of your mon-
itoring system just in case your digital mixer, or another device locked to the D24’s
wordclock, becomes unlocked and produces unpleasant noises.
Wordclock Connections
When the wordclock source is set to WC IN or WC
IN DUAL, the D24 locks to the wordclock signal
received at the WORD CLOCK INPUT connector.
The WORD CLOCK OUTPUT connector trans-
mits the wordclock signal received at the WORD
CLOCK INPUT when the WORD CLOCK 75Ω
TERM/THRU switch is set to THRU, or the inter-
nally generated wordclock signal when it’s set to
TERM.
The WORD CLOCK 75Ω TERM/THRU switch is
used to terminate the wordclock signal connected
to the WORD CLOCK INPUT connector. See
“Terminating BNC Wordclock Distribution” on
page 131 for hookup examples.
Dual AES/EBU Mode
When using the higher sampling rates of 88.2 kHz and 96 kHz, the number of tracks is
reduced from eight to four and the available tracks are 1, 3, 5, and 7. Project, track, and
part editing functions are not available in this mode. For digital I/O, the D24 uses what’s
known as Dual AES/EBU mode, in which the wordclock frequency is exactly half that
of the sampling rate, and each AES/EBU format digital I/O signal is split in two, requir-
ing two transmission channels. Normally, two AES/EBU format signals, for example,
left and right channels of a stereo signal, can be transmitted by a single balanced con-
nection. In Dual AES/EBU mode, however, only one AES/EBU format signal can be
transmitted per connection. See “Using Dual AES/EBU Mode” on page 186 for more
information. Analog I/O is not possible when a Dual mode wordclock source is
selected.
OUTPUT
WORD CLOCK
INPUT
75
TERM THRU
An external wordclock can
also be sourced from SLOT 1,
SLOT 2, REMOTE IN, or
COAXIAL IN.