Rs422 Master Control Of Non-Linear Video Recorders - Akai DD1500 User Manual

UTILITIES - RS422 - MASTER - 18

RS422 MASTER CONTROL OF NON-LINEAR VIDEO RECORDERS

Using the 'RS422 only' external timecode selection, it is possible to take full advantage of
non-linear hard disk video recorders such as the Akai DV1500 and FED V-MOD 100.
When using any of the SMPTE+RS422 external timecode options, although locate/lock
times in this case are virtually immediate, when jogging at slow speeds, there is no
significant performance improvement over a VTR and the non-linear video recorder will
'stutter' frame by frame much like a normal VTR. However, using the 'RS422 only'
selection, slow speed jogging is exceptionally smooth and very tightly locked to the
DD1500's audio jogging and so is ideal for spotting audio to picture.
However, please note that because of inaccuracies in the timecode sent via RS422, when
playing at nominal speed, there may be instances where there is a ±1 frame offset. This
can be overcome by switching to SMPTE+RS422 for playback and using RS422 only for
jogging and spotting. Of course, in RS422 SETUP (SHIFT+EXT M/C), RS422 MODE must
be set to MASTER and EXT M/C must be switched to ON.
Version 2.00 - March, 1996 Page 167