Rs-422 Machine Control - MOTU V4HD User Manual

To resolve another device to the V4HD (even when
video is enabled), connect the V4HD's WORD
OUT jack to the word clock input on the other
device (Figure 3-12).
Master
Word clock OUT
Slave
Figure 3-12: Slaving another digital audio device to the V4HD via
word clock. For the V4HD clock source, choose 'Video Clock' or, if the
V4HD is in Audio Only mode, any other clock source besides word
clock.
Word clock out/thru
The V4HD provides a third word clock output that
can function either as a second output or as a word
clock thru jack. Just set the accompanying switch
as desired. In Thru mode, termination is disabled
so that you can daisy chain another word clock
device. Make sure the device has its own proper
termination for the end of the word clock chain.
Slaving to a 2x and 1/2x word clock
The V4HD has the ability to slave to a word clock
signal running at either twice or half their current
clock rate. For example, the V4HD could be
running at 96 kHz while slaving to a 48 kHz word
clock signal from another device. Similarly, the
V4HD could run at 88.2 kHz and slave to 44.1 kHz
word clock. Conversely, the V4HD could run at
48 kHz and slave to a 96 kHz word clock signal.
Remember, the word clock signal must be one of
the following:
the same as the V4HD clock
■
twice the V4HD clock
■
half of the V4HD clock
■
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V4HD
Word clock IN
Other device
Forcing a 1x word out rate
When the V4HD is operating at a 2x or 4x sample
rate, it can generate a word clock output signal that
either matches the current system clock rate (any
rate between 88.2 and 192kHz) or the
corresponding 1x rate. For example, if the V4HD is
operating at 192kHz, you can choose to generate a
word out rate of 48kHz. For details on how to make
this word clock output setting, see "Word Out" on
page 77.

RS-422 MACHINE CONTROL

If you have a VTR or other device equipped with
Sony 9-pin compatible machine control, and you
would like to control it using Final Cut Pro's
machine control features, connect its RS-422 port
to the V4HD's RS-422 port (Figure 3-13). Also see
"Device control" on page 66.
RS-422 IN
VTR or other device equipped
with machine control
Figure 3-13: RS-422 machine control.
I N S T A L L I N G T H E V 4 H D H A R D W A R E