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RS422
RS422 MASTER CONTROL
Any of the Akai DD/DR series machines can be used as an RS422 master using the Sony™ P2
protocol. This means that all play, jog, shuttle and locate commands are issued from the Akai
machine allowing you to control a VTR equipped with RS422. Connections should be made as
shown in the RS422 section of each machine’s manual.
Switching on the ON-LINE key engages the RS422 function. Because it is necessary for the
external VTR to ‘report back’ its timecode position to the system via the SMPTE IN and EXT.
TIME key, when you switch the ON-LINE key on, the EXT. TIME source is automatically en-
abled to ensure correct lock up of both the Akai machine and the VTR.
However, because of the frame accuracy limit imposed on the Akai machine by the VTR over
RS422, it is sometimes necessary to ‘isolate’ the Akai system for greater editing accuracy, To
do this, simply switch off the ON-LINE key - this will allow the system to be used ‘stand alone’.
As a practical example, let’s say you are trying to sync a door slam sound effect in the system’s
project with the picture on video. You could, of course, do everything referenced to frame
accurate picture but, you just cannot get the door slam precisely in sync. By switching off the
ON-LINE key, you can momentarily disengage the VTR, ‘isolating’ the system and you can
place the sound effect, nudging it backwards or forwards in sub-frame increments on the RE32
until you think it’s at the right position. You can then re-engage the VTR by switching on the ON-
LINE key again and trying it out against picture. You can repeat this process until it’s perfectly
in sync.
The RS422 SETUPparameters are accessed from the SETUP page’s REMOTE menu:
Pressing the RS422 soft key on this page will take you to the following page:
RS422 MASTER is selected in the RS422 MODE field. You will see this screen:
RS422 MACHINE CONTROL SETUP
RS422 MACHINE CONTROL SETUP
LAYBACK
RS422 RECORD
RS422 RECORD
DEVICE SETUP
DEVICE SETUP
Edit delay : 2 frames
Edit delay : 2 frames
VTR locate offset :
VTR locate offset : ()():()():()5:()().()()
RS422 Mode :
RS422 Mode :
MASTER
The parameters are:
EDIT DELAY
This sets the delay between the edit instruction being issued and the
machine responding to that command. Every machine is different
(for example, a U-Matic is 6 frames and a Betacam is 2 or 3 frames -
you should consult your VTR’s or edit controller’s operator’s manual
for information on this).
Summary of Contents for RE32
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