5-44

 

 

 

 

 

 

 

B-Chain Alignment Procedures

 

 

g. Adjustment of Bypass Gain

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Step

Action

Indication

 

No.

 

 

 

 

 

 

 

 

 

 

 

1

NORMAL BYPASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

3

local active

 

 

 

4

5

6

 

 

 

3

 

7

 

2

 

8

 

1

 

9

 

0

 

10

 

select

 

mute

 

local/remote

 

 

4

 

 

xx dBC

 

 

 

Cat. No.

 

 

 

240A

 

04

 

Dolby Stereo

 

 

A-type

 

 

 

 

 

 

Proj. 1

 

 

 

GAIN

 

 

 

Lt

 

 

 

hf

 

 

 

GAIN

 

 

 

Rt

 

 

 

hf

 

 

 

Lt tp

 

 

 

Lt

 

 

 

signal

 

 

 

present

 

 

 

Rt

 

 

 

Rt tp

 

 

 

GAIN

 

 

 

Lt

 

 

 

hf

 

 

 

GAIN

 

 

 

Rt

 

 

 

hf

 

 

 

Proj. 2

 

 

 

gnd

5-45

B-Chain Alignment Procedures

g. Adjustment of Bypass Gain

Notes

This section of the alignment procedure covers the adjustment of the gain that is in effect when the CP65 is switched from NORMAL to BYPASS.

Verify that the NORMAL/BYPASS switch is in the NORMAL position.

Thread and play the Cat. No. 69 Pink Noise film loop on the projector.

Check that the local FADER is selected — the local active LED on the CP65 is lit. If necessary, select the local FADER by pressing the select local/remote switch.

Set the FADER to the 7 setting.

Press the format 04 Dolby Stereo A-typeswitch. Measure and note the SPL (sound pressure level) in the theatre.

Page 61
Image 61
Dolby Laboratories CP65 manual Chain Alignment Procedures Adjustment of Bypass Gain, Xx dBC