XD20 Installation and Operating Guide
Version 1.1
Document # 9301H264001.1
57
5.5. Timecode Reader Sync Adjustment
This adjustment is easily performed using the numbered leader in front of the DTS Demo Reel. (The
demo reel is supplied with the
DTS Technician’s Kit
, which can be purchased from any Datasat Digital
Entertainment dealer.) See the steps (below on this page). To aid in calibration, the offset leader is
available separately (DDE part # 6800000201).
If you do not have a demo reel, the delay can be calculated by counting the number of picture frames
from the D600 reader head red LED (lens) to the projector’s picture (“film”) aperture. Multiply the result
by 1.25 and subtract 1. Round the resulting number to the closest ¼ (0.25). Set the OFFSET value in the
XD20 timecode menu (“TC Reader Offset”) to this number.
Example: 27 frames x 1.25 = 33.75
33.75 - 1 = 32.75
Set the OFFSET to 32.75
Remember
: When using the counting frames method, frames are counted from the timecode
reader lens to the picture aperture.
5.5.1. Procedure Using Demo Reel
The Demo Reel has a specially printed leader for setting the timecode head offset.
1.
Using the numbered leader, put the start mark 00 at the reader’s lens (red LED) and thread the
film through the projector as normal.
2.
After threading, look at the film and read the number at the projector’s sound head. This is the
OFFSET value and that number should be entered into the XD20 timecode offset menu (“TC
Reader Offset”).
Caution
: Make the same size film loops inside the projector when measuring offset as when
running a movie. Failure to do so will result in improper sync when the movie runs in DTS
Digital mode.
For two-projector houses
, the reader at each projector must have the same
OFFSET value.
GREEN LED - TIMECODE INDICATOR
FILM THREADED THROUGH READER
RED LED
WARNING:
FACTORY SET
DO NOT ADJUST
Figure 5: DTS Timecode Reader Head, Threading
