Installation manual

Dolby
®
Model CP650 Installation Manual
iv
Chapter 4 B-Chain Alignment
4.1 Check Theatre Equipment ........................................................................4-1
4.2 Microphone Placement.............................................................................4-2
4.3 Initial Setup ..............................................................................................4-3
4.4 SPL (Sound Pressure Level) Calibration..................................................4-4
4.4.1 Initial Setup (CP650s with Cat. No. 791 Crossover)..................4-4
4.4.2 Calibration Procedure (All CP650s) ...........................................4-4
4.5 Initial Output-Level Calibration...............................................................4-6
4.5.1 Main Channels ............................................................................4-6
4.5.2 Subwoofer Channel.....................................................................4-8
4.6 Crossover Setup (CP650 with Cat. No. 791)............................................4-9
4.7 Room Equalization .................................................................................4-17
4.7.1 Crossover Level Adjustment (for CP650s with Cat. No. 791) .4-17
4.7.2 Setting Coarse (Bulk) EQ .........................................................4-19
4.7.3 Setting Fine EQ (1/3 Octave)....................................................4-20
4.7.4 The EQ Assist Feature ..............................................................4-22
4.7.5 Setting Subwoofer Channel EQ................................................4-23
4.7.6 Final Output-Level Calibration.................................................4-25
4.8 Final Sound Check: Rotating Pink Noise...............................................4-28
Chapter 5 A-Chain Alignment
5.1 Overview ..................................................................................................5-1
5.2 Reverse-Scan Checkup: Projector ............................................................5-2
5.3 Analog Optical Alignment: Projector.......................................................5-2
5.4 Dolby Level Set........................................................................................5-4
5.5 Film-Path Alignment Check.....................................................................5-6
5.6 Cell Alignment Check ..............................................................................5-7
5.7 Cell Wiring Check....................................................................................5-8
5.8 Azimuth Check.........................................................................................5-8
5.9 Focus Check .............................................................................................5-9
5.10 Optical HF Equalization (Slit-Loss EQ).................................................5-10
Chapter 6 Digital Soundheads
6.1 Mechanical Alignment .............................................................................6-1
6.2 Adjustment with Oscilloscope..................................................................6-2
6.3 Focus Adjustment.....................................................................................6-2
6.4 LED Brightness Confirmation and Adjustment .......................................6-3
6.4.1 Inboard Digital Readers ..............................................................6-3