User`s manual

Dolby
®
CP650 Digital Cinema Processor User’s Manual Operating Instructions
2-3
Other Possible Front-Panel Sound Format Displays
L C R Rs Ls SW
Figure 2-3 Front-Panel Display Showing Dolby Digital Film Playing
Figure 2-3 shows the display when the CP650 is playing a Dolby Digital soundtrack
with no Dolby Digital Surround EX decoder board installed. Since there are no Le,
Re, Bsr, or Bsl channels present in this configuration, no signal bars are indicated for
those channels.
L C R Rs Bsr Bsl Ls SW
Figure 2-4 Front-Panel Display Showing Dolby Digital Surround EX Film Playing
Figure 2-4 shows the display when the CP650 is equipped with a Dolby Digital
Surround EX decoder board, and playing a Dolby Digital Surround EX soundtrack.
The additional Back Surround Left and Back Surround Right channels are present in
this configuration.
The digital sound data from current films produced with the Dolby Digital
Surround EX process contains auto-switching bits, or “Surround EX flags.” A CP650
equipped with the Cat. No. 790 Surround EX board detects these bits and switches the
additional back surround channels on as shown. If the flags indicate that the film is
not a Surround EX film, or if the flag bits are not present, Auto Surround EX mode is
switched off, and the display will show equal levels for the Rs/Bsr and Bsl/Ls
channels.
Front-Panel Sound Format Display on Units with Earlier Software
The bar graph display on CP650s running software earlier than version 2.1 is slightly
different. See Figure 2-5.
Dolby Digital Surround EX board installed: Not installed:
L C R Ls Rs SW Bsl Bsr L C R Ls Rs SW
Figure 2-5 Front-Panel Display when Running Earlier Software