Film-Tech SA10 Manual de usuario

Film-Tech

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Model SA10

Digital Surround EX Adapter

Installation Manual

Issue 5 Part No. 91574

Installation Manual

Model SA10

Dolby Digital

Surround EX Adapter

Dolby Laboratories Incorporated

U.S. 100 Potrero Avenue, San Francisco, CA 94103-4813

Tel: 415-558-0200; Fax: 415-863-1373; Web: www.dolby.com

U.K. Wootton Bassett, Wiltshire SN4 8QJ

Tel: (44) 1793-842100; Fax: (44) 1793-842101

Like all Dolby cinema sound products, the SA10 is fully supported by hundreds of factory-trained

technicians worldwide, on-call emergency assistance, and the most experienced distributor

network in the industry.

DISCLAIMER OF WARRANTIES: Equipment manufactured by Dolby Laboratories is warranted against defects in materials and

workmanship for a period of one year from the date of purchase. All warranties, conditions or other terms implied by statute are excluded to

the fullest extent allowed by law.

LIMITATION OF LIABILITY: It is understood and agreed that Dolby Laboratories’ liabilitywhether in contract, in tort, under any warranty, in

negligence or otherwise shall not exceed the cost of repair or replacement of the defective components and under no circumstances shall

Dolby Laboratories be liable for incidental, special, direct, indirect or consequential damages (including but not limited to damage to software

or recorded audio or visual material), or loss of use, revenue or profit even if Dolby Laboratories or its agents have been advised, orally or in

writing, of the possibilityof such damages.

Dolby and the double-D symbol are registered trademarks of Dolby Laboratories Inc

THX is a registered trademark of Lucasfilm, Ltd.

Patents Pending in the U.S. and other countries

ISSUE 5

S99/12467/12566

Dolby Part No. 91574

TABLE OF CONTENTS

INTRODUCTION

About DolbyDigitalSurround EX............................................................................1

About the SA10 Surround Adapter...........................................................................2

Front-PanelControls.................................................................................................2

Specifications............................................................................................................4

SECTION 1 INITIAL SETUP AND INSTALLATION

1.1Unpacking....................................................................................................1-1

1.2Equipment Required.....................................................................................1-1

1.3Mounting and Connecting............................................................................1-1

1.3.1Proper Grounding................................................................................1-2

1.3.2Connections........................................................................................1-2

1.4 MainsPower Wiring....................................................................................1-3

1.5Jumper and SwitchSettings..........................................................................1-4

1.6Backup Power Check

Hum Problems.....................................................................................1-6

1.8SA10 Circuit Card Descriptions...................................................................1-6

Card Locations Figure

Backup Operation...............................................................................1-6

WIRING DIAGRAMS

CP500 Wiring........................................................................................................1-6

CP65 Wiring..........................................................................................................1-6

CP200 Wiring

CP55 Wiring..........................................................................................................1-6

CP45 Wiring..........................................................................................................1-6

SYSTEM BLOCK DIAGRAM

SECTION2ALIGNMENT WITHCP500

2.1Programming the CP500 Format Screenfor Surround EX Switching............2-1

2.2InitialSetup for SystemAlignment...............................................................2-3

2.3Set CP500 Output Levels.............................................................................2-6

2.4Equalize Surround Speakers.........................................................................2-7

2.5Set Surround Output Levels.........................................................................2-9

SECTION3ALIGNMENT WITHCP65

3.1InitialSetup..................................................................................................3-1

3.2Set CP65 Output Levels...............................................................................3-2

3.3Equalize Surround Channels.........................................................................3-5

3.4Set Surround Output Levels.........................................................................3-7

3.5Wakeup Format Fix....................................................................................3-10

ii / Table of Contents

SECTION 4 ALIGNMENT WITH CP200

4.1 Initial Setup..................................................................................................4-1

4.2 Set CP200 P(Ls) and Q(Rs) Channel Eq to Flat............................................4-1

4.3 Set CP200 Output Levels.............................................................................4-1

4.4 Equalize Surround Channels.........................................................................4-2

4.5 Set Surround Output Levels.........................................................................4-4

SECTION 5 ALIGNMENT WITH CP55

5.1 Initial Setup..................................................................................................5-1

5.2 Set CP55 Output Levels...............................................................................5-2

5.3 Equalize Surround Channels.........................................................................5-5

5.4 Set Surround Output Levels.........................................................................5-7

5.5 Wakeup Format Fix....................................................................................5-10

SECTION 6 ALIGNMENT WITH CP45

6.1 Initial Setup..................................................................................................6-1

6.2 Set CP45 Output Levels...............................................................................6-2

6.3 Run Pink Noise............................................................................................6-4

6.4 Equalize Surround Channels.........................................................................6-4

6.5 Set Surround Output Levels.........................................................................6-7

INTRODUCTION

Thank you for purchasing the DolbyModel SA10 Digital Surround EX Adapter. The

SA10 combines ease and flexibilityof operation with the high performance and qualityfor

which all Dolbyproducts are known around the world.

About DolbyDigital Surround EX

DolbyDigital Surround EX adds a third surround channel to digital film sound, a

concept first envisioned bysound designers at Lucasfilm’s Skywalker Sound post-

production facility. Jointlydeveloped byDolbyLaboratories and Lucasfilm THX, Dolby

Digital Surround EX gives sound mixers a new level of creative freedom.

DolbyDigital-Surround EX is fullycompatible with all current 5.1 digital sound formats

and theatre systems. Prints that use it playnormallywith current systems, and provide the

extra surround channel when played over systems equipped with the DolbySA10 adapter.

It has long been known that a center screen channel is necessaryto ensure the precise

localization of front sounds for all viewers, including those seated off to the sides. Dolby

Digital Surround EX brings similar benefits to the surround sound field. With Surround

EX, a back surround channel is reproduced bythe speaker arrayat the back of the theatre,

while left and right surround is reproduced bythe side arrays (see illustration). This means

that sounds can now be positioned behind the audience, opening the door to exciting new

effects such as true 360° pans.

Left surround

Back surround left

Right surround

Left LFE (sub) Center Right

Back surround right

Power

amps

Dolby SA-10

adapter

Cinema processor

with Dolby

Digital capability

LS RS

LFE

BSR

The back surround channel also makes front-to-back and back-to-front transitions more

realistic. Flyovers reallyseem to pass overhead, rather than down the sides of the theatre.

Even ambient sound reproduction is improved, being less affected bythe width of the

theatre. Equallyimportant, the new back surround channel assures that even viewers

seated close to the left or right of the theatre experience the total surround ambiance

intended bythe filmmaker.

SA10 installation requires wiring the surround speakers into left, back (split into two

groups as shown), and right groups; and providing two additional channels of surround

/ Introduction

amplification. THX-certified theatres provide the ideal environment for getting the most

out of DolbyDigital Surround EX as theymeet acoustical requirements specifically

developed for movie soundtracks. In addition, theyhave most of the necessaryequipment

alreadyin place for proper playback, including speakers on the rear wall of the theatre.

About the SA10 Surround Adapter

The DolbySA10 Surround Adapter upgrades anyexisting 5.1-channel digital cinema

sound system to three surround channels that can playdigital prints prepared with the

DolbyDigital Surround EX process. It is easilyinstalled in the booth byinserting in the

signal chain between the existing cinema sound processor and the power amplifiers. Two

power amplifier channels are required for powering the two groups of back surround

channel speakers. The figures below show the surround signal distribution for

conventional 5.1 channel surround and for DolbyDigital Surround EX modes.

Left surround

Back surround left

Right surround

Back surround right

Conventional

5.1-channel mode

BSL

BSR

Power

amps

Dolby SA-10

adapter

BSL

BSR

Left surround

Back surround left Back surround right

Right surround

Surround EX mode

BSL

BSR

Power

amps

Dolby SA-10

adapter LS

BSL

BSR

Introduction /

In addition to replaying the three surround channels, the SA10 uses three seven-band

equalizers operating in conjunction with tunable high- and low-frequencyshelves to ensure

smooth surround-speaker response to the international standard curve. Front-panel controls

include a DolbySurround EX disable pushbutton, signal-present LEDs, and a backup

power supplyselector switch. Rear-panel connections make it possible to select the Dolby

Digital Surround EX mode remotelywith automation systems.

If the Surround EX mode is not disabled while playing a conventional 5.1-channel digital

film, there will be a slight change to the surround signal distribution. If the Surround EX

mode is not disabled while playing an optical soundtrack, there will be a tendencyfor the

surround information to concentrate in the back wall speakers, resulting in a lower level of

surround information heard bythe patrons seated at the front of the theatre.

See the SA10 Block Diagram located at the end of this section.

Front-Panel Controls

/ Introduction

Specifications

Construction

Rack-mount chassis frame with plug-in circuit boards accessible behind hinged front

panel.

Signal Connections

Standard screw-type terminal blocks for audio signal inputs. Output audio signals and

automation control signal connection provided via 25-pin D-connectors.

Inputs

Ls and Rs inputs, 10 kΩnominal input impedance, 120mV nominal input sensitivityfor

operatinglevel.

Outputs

Output impedance: 150 Ω. Load greater than 600 Ω. Maximum output level +8 dBu.

Typical operating level -18 dBu. Operating levels from 10 mV to 200 mV maybe

accommodated.

Control Input

Mode control provided via 25-pin female D-connector.

Surround Loudspeaker Equalization

Equalizers for Left Surround, Back Surround, and Right Surround speakers provide ±10

dB high- and low-frequencycontrols with adjustable turnover frequency, plus seven

adjustable ±6 dB octave band filters covering the range from 120 Hz to 8 kHz.

Distortion (anychannel)

1 kHz: typically<0.15% at Dolbylevel (50% modulation).

Dynamic Range

Typically88 dB.

Dimensions

3-U rack-mount chassis. Faceplate: 133 mm x 483 mm (5.25"x 19"). Maximum projection

behind mounting surface: 308 mm (12.1"). Maximum projection in front of mounting

surface: 12.70 mm (0.50").

Weight

10.1 kg (22.3 lbs).

Power Requirements

Power supplied from two outboard transformers (one main, one emergencybackup).

Normal supply: 24 VAC at 600 mA.

Backup supply24 VAC at 200 mA.

No fuse requirements, outboard transformers are self-protecting.

Ambient Operating Temperature

Up to 40° C.

RegulatoryNotices

North America: This unit complies with the limits for a Class A digital device, pursuant to Part 15 of

the FCC Rules and carries ULlisting. The unit complies with Canadian ICES-003 class A.

Europe: This product complies with the requirements of Low Voltage Directive

73/23/EEC and EMC Directive 89/336/EEC and carries the CE marking accordingly.

Specifications subject to change without notice.

SECTION 1

INITIAL SETUP AND INSTALLATION

1.1 Unpacking

Before unpacking the SA10, inspect the outer carton for shipping damage. If the carton

shows damage, inspect the unit in those areas.

Carefully remove the unit from its carton, remove the plastic wrapping, and place on a flat

surface.

1.2 Equipment Required

The following equipment is required for proper installation and alignment of the SA10:

•1/3 Octave Real Time Spectrum Analyzer (RTA) with multiple calibrated microphones

and a multiplexer, or a single calibrated microphone.

•Sound Pressure Level Meter (with slow time-constant and C-weighting scale).

•Cat. No. 69T Dolby tone test film, shipped with the SA10 packing.

•Cat. No. 1013 Surround EX final alignment check and channel ID test film.

•AC voltmeter.

•Hookup cable kits or individual control cables are available. Check with your dealer or

contact Dolby Laboratories for availability.

Part numbers for U.S. customers:

Part No. CSA/500 Cable set for the CP500 Cinema Processor

Part No. CSA/65 Cable set for the CP65 Cinema Processor

Part No. CSA/200 Cable set for the CP200 Cinema Processor

(Note: The Cat. No. 845 cable included in this set is required.)

Part No. CSA/55 Cable set for the CP55 Cinema Processor

Part No. CSA/45 Cable set for the CP45 Cinema Processor

1.3 Mounting and Connecting

Disconnect the surround output wiring from the existing cinema processor. These

connections will be moved to the SA10 surround output connector. Mark each cable

identifying its channel. Leave the cables connected to the power amplifiers and booth

monitor.

Open the front panel and confirm that all modules and circuit cards are seated properly.

The new surround channel is made up of two separate amplified signals, each requiring a

power amplifier. You may need to purchase additional power amplifiers for your

installation. To avoid heat problems, do not mount the SA10 immediately above the

cinema processor or the power amplifiers. The power amplifiers should be located away

from the SA10 to avoid hum pickup problems.

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