Datasat AP20 Installation And Operating Manual page 130

Prior to optical alignment, verify all wiring and connections are correct. Shielded cables such as Belden 8451 or
similar should be used.
The right channel is nearest the edge of the film. To confirm proper wiring, while observing the projector output
on a RTA or the AP20 setup screen, place a business card or similar object to block the side of the cell nearest the
edge of the film. You should detect a large drop in the right channel level.
Although white light tungsten type exciter lamps have been replaced in projectors with Red LED readers the
adjustment and calibrations remain similar. Making adjustments to the film optics will vary depending on the
manufacturer; it is recommended that a review of the manufacturer's recommended alignment adjustments be
reviewed prior to making any mechanical changes on the optical head on the projector.
F4.4. Mechanical Optical Alignment
Connect the oscilloscope to the AP20 via the Left and Right BNC test connectors on the H338 optical card
located on the back of the AP20. See Figure 9.
Oscilloscope
Figure 9 – Test connections
The Film Setup screen on the AP20 will be used during the alignment procedure. Go to Menu (System) →
Formats → Format Options → Film Options → Film Setup.
Figure 10 – Film Card Setup Screen
Note: When in the Film Card Setup screen, noise reduction (SR or A) is not active and all audio outputs are
muted. Changing to another screen will enable any noise reduction and un-mute the audio. While in this
screen you can also select the red Muted button to un-mute the audio. When un-muted, the button will turn
gray and say Mute.
Appendix F. H338 Optical Film Card Option
AP20 Installation and Operating Guide
CH 1
CH 2
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RTA
F-9
Version 1.2
Document #: 9301H39200 1.2