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DIGITAL SYNC
INTERNAL CLOCK
DIGITAL INPUT
NOTE 1: If optional DIO4 DIGITAL INPUTS are installed in the DD1500m, you will also receive
DIGI IN C. in this field. When recording using digital inputs C - F, wordclock should always be
received through DIGI IN A.
NOTE 2: When recording through multiple digital inputs, these signals MUST ALL BE AT THE
SAME SAMPLING FREQUENCY .
PAL/SECAM Video
NTSC 29.97Hz Video
NTSC 30Hz Video
PAL/SECAM (VITC in)
Version 1.00
This allows you to synchronise the selected machine to a variety of video
and wordclock synchronisation sources for precise system
synchronisation. The options available (depending on the capabilities of
the selected machine) are:
This selection uses the machine's internal crystal as its sync source and
so the system is 'free running'. This is the selection used when using the
machine on its own - when using it with external video equipment, to
prevent drift of audio to picture, it is recommended to sync the entire
system (i.e. VTR, all machines, etc.) to one of the external wordclock or
video sync sources described below.
This synchronises the machine to the digital wordclock signal being
received from the optional digital audio interface (TDIF, ADAT or AES/
EBU).
On the DD1500 there are two digital input sources which are displayed
as:
DIGI IN A - This synchronises the DD1500 to the digital wordclock signal
being received through DIGITAL INPUT A. This selection is automatically
made when recording when this input is used as the input source in the
INPUTS routing matrix (see RECORDING).
DIGI IN B - This synchronises the to the digital wordclock signal being
received through DIGITAL INPUT B. This selection is automatically made
when recording when this input is used as the input source in the INPUTS
routing matrix (see RECORDING).
This synchronises the machine to a video sync signal through the SYNC
BNC connector on the rear panel. Typically, this will be used in Europe
to sync to a common PAL/SECAM house sync source.
This synchronises the machine to an NTSC 29.97Hz house sync signal
through the SYNC BNC connector. This would normally be used in Japan
or America when 29.97 frames per second timecode is being used.
This synchronises the machine to an NTSC 30Hz house sync signal
through the SYNC BNC connector. This would usually be used in Japan
or America when 30 frames per second timecode is being used.
This option is available on the DD1500 only and synchronises the
machine to a video sync signal through the VITC SYNC BNC connection.
Typically, this will be used in Europe to sync to a common PAL/SECAM
house sync source.
SYSTEM SETUP
155
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