Dolby
®
Model CP650 Installation Manual
Final Adjustments
7-6
Dolby Digital
Reader Delay
> xxx Perforations
Dynamic
Proj 1
Thread a loop of Cat. No. 1010 Digital Soundhead
alignment test film through the projector, analog
soundhead, and digital soundhead. Run the
projector.
menu
OK
Press the left menu button to move to the
Dolby
Digital Reader Delay
menu. Both optical and
digital audio are present while the CP650 is set to
this menu item.
= xxx Perfs
OK
The audio contains equal digital and optical sound
simultaneously.
Rotate the front-panel knob to set the number of
perfs that produce a minimum delay between the
analog and digital track, then push the OK button.
The tables below show representative delay settings for a variety of common
projectors in use:
Table 7–3
Typical Delay Settings for Dolby Digital Readers
Projector
Delay (Perfs)
Projector
Delay (Perfs)
Ballantyne 35mm
247
Christie
250
Century 35mm (SA)
245
Century 35/70 (JJ)
309
Norelco/Kinoton
AAII (DP70)
283
Cinemeccanica V5
252
Simplex 35mm (XL)
242
Cinemeccanica V8
260
Simplex 35/70
298
Table 7–4
Typical Delay Settings for Built-in Digital Readers
Projector
Delay (Perfs)
Projector
Delay (Perfs)
Cinemeccanica
V5
28
Century w/ Component
Engineering or Kelmar
20
Christie 26
Simplex 5 Star w/ Component
Engineering or Kelmar
26
Ernemann 15
30
