Akai DD1500 User Manual page 56

10 - SYSTEM SETUP
WORDSYNC
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 .
Page 48
This allows you to synchronise the DD1500's DACs to a
variety of video and wordclock sync sources for precise
system synchronisation. The options available are:
INTERNAL CLOCK - This selection uses the DD1500's
internal crystal as its sync source and so the system is 'free
running'. This is the selection used when using the DD1500
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, DD1500, etc.) to one of the
external wordclock or video sync sources described below.
DIGI IN A - This synchronises the DD1500's DACs 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 DD1500's DACs 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).
PAL/SECAM (Video A) - This selects that the DD1500's
DACs will synchronise to a video sync signal through the
VIDEO SYNC (A) BNC connection. Typically, this will be
used in Europe to sync to a common PAL/SECAM house
sync source.
NTSC 29.97Hz (Video A) - This selects that the DD1500's
DACs will synchronise to an NTSC 29.97Hz house sync
signal through the VIDEO SYNC (A) BNC connection. This
would normally be used in Japan or America when 29.97
frames per second timecode is being used.
NTSC 30Hz (Video A) - This selects that the DD1500's
DACs will synchronise to an NTSC 30Hz house sync signal
through the VIDEO SYNC (A) BNC connection. This would
usually be used in Japan or America when 30 frames per
second timecode is being used.
PAL/SECAM (VITC in) - This selects that the DD1500's
DACs will synchronise 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.
NTSC 29.97Hz (VITC in) - This selects that the DD1500's
DACs will synchronise to an NTSC 29.97Hz house sync
signal through the VITC SYNC BNC connection. This would
normally be used in Japan or America when 29.97 frames
per second timecode is being used.
Version 2.00 - March, 1996