Dolby Laboratories 737 3.5 Dubbing studio

Model 737 Soundtrack Loudness Meter - Leq(m) Cat. No. 448B Input Adapter Board

3-4

3.5 Dubbing studio

Dubbing Studio set-ups may vary depending upon location. Contact a Dolby sound

consultant or Dolby office to resolve any uncertainties. Installation of the Cat. No. 448B

can be optimized using the logic map in Table 3-1 and Figure 3-4, the Cat. No. 448B

schematic diagram. The following examples are two common configurations.

Example 1

A typical UK setup uses the DA20 or dubbing interface (Cat. No. 448) output switched

to the CP65-S. The Cat. No. 448B should take this unbalanced six-track signal as the main

input (grounding the negative inputs) and the two-track signal from the Cat. No. 150

via the auxiliary input. OPT and MAT should be fed from either the FA line of the

CP65 or the MAT line of the dubbing interface and SR should be grounded. Follow

the installation steps in Section 3.4.2 on page 2. The six-track input is paralleled from

the 300 mV input to the CP65 after any switching between the monitor bus and DA20.

Figure 3-3 Typical UK setup

Example 2

The six-track main inputs are balanced and the two-track inputs are derived from the

main input channels 1&3 or 2&3. OPT, MAT, and SR lines are fed from the dubbing

interface. The DA20 output should be routed at the calibrated level to the main monitor

buses of the studio before the dubbing interface.

Cat. No. 448

Cat. No. 448B Model 737

CP65

6p2w Switcher DA10/20

Studio monitor bus

x6 (bal.) x2 Lt/Rt - opt

x6 (unbal.) x6 (unbal.)

Cat. N o. 448

Cat. No. 448B Model 737

CP65

Studio monitor buss

x6 (bal.)

x2 Lt/R t - opt

x6 (unbal.)

MAIN

Contents

Main Dolby Laboratories Inc Table of Contents List of Figures List of Tables Chapter 1 Introduction Chapter 2 Operation and Features Chapter 3 Cat. No. 448B Input Adapter Board Chapter 4 Specifications Appendix A Background List of Figures List of Tables Chapter 1 Introduction Chapter 2 Operation and Features 2.1 Front Panel Controls 6/4 - 2 channel switch Start Trip Set Cal 2.1.1 6/4 2 Channel Switch 2.1.2 Input Trimpots 2.1.3 Trip Set 2.1.4 Pushbuttons Model 737 Soundtrack Loudness Meter - Leq(m) Operation and Features 2.2 Back Panel Connectors Figure 2-3 Model 737 back panel 2.2.1 Analog Audio Inputs Figure 2-4 Audio input connectors (detail of rear panel) The XLR input connectors for channels 16 use the following wiring convention: 2.2.2 Mon Out 2.2.3 DC Out 2.2.4 Power and Control 2.3 Connection and Calibration 2.3.1 Connecting to an Audio Console 2.3.2 Connecting to a Dolby Cinema Processor 2.3.3 Connecting to a DA10/20 Digital Adapter 2.3.4 Connecting to Non-Dolby Digital Adapters 2.3.5 Connecting to the SDU4 Surround Decoder 2.3.6 Calibration Procedure 2.3.7 Automated Input Adapter Board (Cat. No. 448B) 2.4 Mains Power 2.5 Interface 2.5.1 Grounding Model 737 Soundtrack Loudness Meter - Leq(m) Operation and Features 2-10 2.6 Block diagram Figure 2-6 Model 737 block diagram L/Lt C Ls R/Rt Sub Rs Page Chapter 3 Cat. No. 448B Input Adapter Board 3.1 Introduction 3.2 Logic map Model 737 Soundtrack Loudness Meter - Leq(m) Cat. No. 448B Input Adapter Board 3-2 3.3 Component and Connector Layout x2 (Lt/Rt - opt) CAT. NO. 448B Cat. No. 448B Figure 3-1 Cat. No. 448B Interface Adapter 3.4.3 Alignment 3.5 Dubbing studio Page 3.5.1 Alignment Page Chapter 4 Specifications Temperature and Humidity EMC Limits General Appendix A Background A.1 Loudness A.1.1 The Current Situation Page A.2 How Loud Is a Movie? A.3 Standardizing a Measurement Technique for Soundtrack Loudness A.3.1 Alternative Measurement Indices A.4 Analysis of the Data Page Model 737 Soundtrack Loudness Meter - Leq(m) Background A-8 Figure A-5 Comparison of Leq(m) and peak levels Shine demo 1 (Rach. III) Leq CCIR-weighted Peak Level C-weighted, fast 5.6 dB offset dB A.4.1 Verification of the Data Leq CCIR-weighted Peak Level C-weighted, fast