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PRV-LX1 RS-422A Protocol
8.2 Playback Delay
When the PRV-LX1 is issued a play command, it experiences up to a +2 frames delay in the execution of
the command. The decoding system requires 2 frames to accomplish setup.
8.3 PRV-LX1 as Recording Device
When issuing a “pause” command while recording, the PRV-LX1 continues recording within the same
title/clip, maintaining continuous time-code.
* To issue a “pause” command the user must issue a “shuttle 0” command. This pauses the
recording to insert a chapter mark at the closest GOP of encoded video then recording
continues. The [Auto Chapter] setting should be set to manual.
* Issuing a “stop” command closes the recorded title/clip as defined by the DVD spec. All
subsequent recordings via serial control start with a new title/clip and the LX1 begins
generating new time-code within that title/clip.
8.4 PRV-LX1 as the Source Device
When the PRV-LX1 is the source device being controlled via serial control with an NLE or edit control
device, the following limitation applies.
When an external control device is controlling the LX1 and a “search and play” command is sent via
serial control, the PRV-LX1 reports back frame numbers every 50ms. The PRV-LX1 cannot return
the precise time-code. The unit may return the same value as requested earlier or may skip the
frame while Recording or Playing.
* Manually record without using serial control when the recorder is to be used as a source. Or,
if the external control device offers the ability to change the time-code query speeds, change
the speed to 50ms to match the PRV-LX1.
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