Dolby Laboratories CP650 Installation Manual
  1. Manuals
  2. Brands
  3. Dolby Laboratories Manuals
  4. Computer Hardware
  5. CP650
  6. Installation manual
Dolby Laboratories CP650 Installation Manual

Dolby Laboratories CP650 Installation Manual

Digital cinema processor
Hide thumbs Also See for CP650:
Table of Contents

Advertisement

Quick Links

See also: User Manual , Installation Manual
®
Dolby
CP650
Digital Cinema Processor
Installation Manual
Issue 6
Part Number 91569

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CP650 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Dolby Laboratories CP650

Summary of Contents for Dolby Laboratories CP650

  • Page 1 ® Dolby CP650 Digital Cinema Processor Installation Manual Issue 6 Part Number 91569...
  • Page 2 LABORATORIES OR ITS AGENTS HAVE BEEN ADVISED, ORALLY OR IN WRITING, OF THE POSSIBILITY OF SUCH DAMAGES. Dolby, Pro Logic, and the double-D symbol are registered trademarks of Dolby Laboratories. Auditorium Assist, EQ Assist, and Surround EX are trademarks of Dolby Laboratories. All other trademarks remain the property of their respective owners.

  • Page 3: Table Of Contents

    Sound Pressure Level Calibration ............4-4 4.4.1 Initial Setup with Cat. No. 791 Crossover Installed ....4-4 4.4.2 Calibration Procedure—All CP650s...........4-4 Initial Output-Level Calibration ...............4-6 4.5.1 Main Channels ................4-6 4.5.2 Subwoofer Channel..............4-7 Crossover Setup—CP650 with Cat. No. 791 ...........4-8 Room Equalization .................4-13...
  • Page 4 ® Dolby CP650 Installation Manual 4.7.1 Crossover Level Adjustment with Cat. No. 791 Crossover..4-13 4.7.2 Setting Coarse EQ..............4-14 4.7.3 Setting Fine EQ.................4-15 4.7.4 The EQ Assist Feature ..............4-16 4.7.5 Setting Subwoofer Channel EQ ..........4-17 4.7.6 Final Output-Level Calibration..........4-18 Final Sound Check—Rotating Pink Noise ..........4-20...
  • Page 5 Connect to the Circuit Board ............8-3 8.1.4 Set the Address Switch ...............8-4 8.1.5 Assemble the Unit...............8-4 8.1.6 Connect to the CP650 ..............8-5 Cat. No. 771 Remote Fader Installation ...........8-6 Chapter 9 Maintenance and Troubleshooting Print Cleanliness ..................9-1 Digital Soundhead Maintenance...............9-1 CP650 Troubleshooting................9-2...
  • Page 6 Figure 3-4 Front-Panel Display Showing Dolby Digital Surround EX Film Playing....3-3 Figure 3-5 Front-Panel Display when Running Earlier Software ..........3-4 Figure 3-6 Fader Characteristic ....................3-5 Figure 3-7 CP650 Operation and Setup Menu Control Buttons...........3-6 Figure 3-8 Setup Control Panel ....................3-7 Figure 3-9 Power Supply Voltage Test Points ................3-9 Figure 4-1 EQ Microphone Placement..................4-2...
  • Page 7 Dolby CP650 Installation Manual List of Tables Table 1-1 Formats Supported by the Various CP650 Models............1-3 Table 2-1 Solar Cell Preamp Board Connectors ................2-5 Table 2-2 Examples of Available Balanced ↔ Unbalanced Adapters ........2-11 Table 7-1 Surround Delays Based on Theatre Dimensions (in Feet) ...........7-5 Table 7-2 Surround Delays Based on Theatre Dimensions (in Meters)........7-5...

  • Page 8: Regulatory Notices

    ® Dolby CP650 Installation Manual Regulatory Notices NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 9 ® Dolby CP650 Installation Manual Do not expose the apparatus to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on the apparatus. CAUTION: Troubleshooting must be performed by a trained technician. To reduce the risk of electric shock, do not attempt to service this equipment unless you are qualified to do so.
  • Page 10 PRODUCT END-OF-LIFE INFORMATION This product has been designed and built by Dolby Laboratories to give many years of service, and is backed by our commitment to provide high-quality support. When it eventually reaches the end of its serviceable life, it should be disposed of in accordance with local or national legislation.

  • Page 11: Cp650 Operating System Software History

    ® Dolby CP650 Installation Manual CP650 Operating System Software History V.1.0.4.4 • First product shipments. • Covered in installation manual, Issue 1. V.1.1.3.0 • Added support for Cat. No. 790 or 794 card: Dolby Digital Surround EX ® decoder and AES3 input for stereo pulse-code modulated (PCM) or Dolby Digital bitstreams from consumer products.
  • Page 12 Left Extra/Right Extra screen channels. V2.2.x.y (where x and y may be any numbers) • Digital film reader output levels can now be checked using the CP650 front-panel screen or setup software. • The noise floor optimization setup step is now called headroom configuration.

  • Page 13: Chapter 1 Introduction

    PC to the CP650. Options available for the CP650 include a remote fader (Cat. No. 771), a remote unit (Cat. No. 779) that duplicates many of the CP650’s front-panel controls, and a ten-...

  • Page 14: Dolby Catalog Number Listing

    ® Dolby CP650 Installation Manual Introduction Dolby Catalog Number Listing Cat. No. 771 Remote Fader Cat. No. 772B Analog I/O and Bypass Circuit Board Cat. No. 773 Dolby Digital Film Decoder Circuit Board Cat. No. 774A System Controller Circuit Board Cat.

  • Page 15: List Of Formats Available

    CP650 Installation Manual Introduction List of Formats Available The formats supported by each CP650 model are listed in Table 1-1. See Appendix C for a complete definition of each format. Table 1-1 Formats Supported by the Various CP650 Models CP650SR...
  • Page 16 ® Dolby CP650 Installation Manual Introduction CP650SR CP650D CP650 CP650XO CP650DC CP650DCXO CP650DCD Format Description Cat. No. 773 Cat. No.790 Cat. No. 790 Cat. No. 790 Cat. No. 790 Cat. No. 778 Cat. No. 791 Cat. No. 791 Bitstream PCM Eight-Channel Input,...

  • Page 17: About Dolby Digital Surround Ex

    Dolby Digital Surround EX is fully compatible with all current 5.1 digital sound formats and theatre systems. Prints that use it play normally with current systems, and provide the extra surround channel when played using a CP650 cinema processor equipped with a Cat. No. 790 or 794 board.

  • Page 18: Figure 1-1 Surround Speaker/Amplifier Switching For 5.1-Channel Use

    ® Dolby CP650 Installation Manual Introduction Surround amplifiers Dolby CP650 Back surround left Back surround right Dolby Digital 5.1 mode Figure 1-1 Surround Speaker/Amplifier Switching for 5.1-Channel Use Surround Dolby CP650 amplifiers Back surround left Back surround right Dolby Digital...

  • Page 19: Specifications

    ® Dolby CP650 Installation Manual Introduction Specifications For digital cinema installations that do not require film soundtrack playback, the CP650DC versions provide digital audio inputs only. Signal Inputs Optical: Balanced inputs for two projectors with stereo solar cells or analog LED readers, digitally controlled gain and digital slit-loss EQ, power available for external cell preamp circuits;...
  • Page 20    ...

  • Page 21: Chapter 2 Installation

    Dolby CP650 Installation Manual Chapter 2 Installation The CP650 uses a universal switching power supply that can accommodate mains voltages from 100–120 VAC, and 200–240 VAC, at frequencies from 50 to 60 Hz. AC MAINS FUSE BYPASS FUSE AC MAINS FUSE...

  • Page 22: Check Bypass Supply Mains Voltage Setting

    The bypass power supply mains voltage selector switch is accessible through a hole in the top cover of the CP650. Use a screwdriver to set the switch to either 120 or 220 VAC. F igure 2-11 shows the switch location.

  • Page 23: Mount The Auditorium Assist Microphone

    • Switchcraft J3FS (stainless steel) • Whirlwind WP1B/1FND (black) Connect the microphone to the mic input located on the rear panel of the CP650 cinema processor. If the microphone input in your installation is currently dedicated to other uses, such as an emergency public address, install the necessary hardware to switch between microphones.

  • Page 24: Motor-Start Relays (Except Cp650Dc Models)

    • Motor start—Less than 1 VDC with respect to signal ground • Motor off—Greater than 3.5 VDC, less than 18 VDC If the CP650 is to be used in a platter operation (single projector), a jumper must be installed. A prewired connector is installed at the factory for this purpose.

  • Page 25: Table 2-1 Solar Cell Preamp Board Connectors

    The 0 V point (audio ground) must be connected from the inboard reader board to the CP650 by a separate wire (or wires) along with the audio signal wires. The cable shield (screen) must be kept separate from the audio ground connections. It must be connected only to the chassis or enclosure of the equipment at each end.
  • Page 26 ® Dolby CP650 Installation Manual Installation – CP650 Out 1+ Optical In Shield Out 1– – Out 2+ Out 2– Shield Cat.No.655 Wiring Diagram Ground wire on pin 5, OPTIONAL Ground wire on pin 2, REQUIRED +Vdd Shield – Figure 2-5 Cell Preamp Wiring Using Two Three-Conductor Shielded (Screened) Cables CP650 –...
  • Page 27 ® Dolby CP650 Installation Manual Installation For Non-EU Countries Only If it is necessary to use two- or four-conductor shielded cables, refer to the following wiring diagrams. – CP650 Out 1+ Optical In Belden 8451 or equivalent Out 1– –...

  • Page 28: Analog Nonsync Sources

    Dolby Digital Cinema systems, CD players, DAT recorders, DVD players, satellite television receivers, HDTV receivers, or HD video players. With the Cat. No. 790 board (included with the standard Model CP650) installed, the CP650 accepts up to four two-channel PCM (pulse code modulated) bitstreams. Each bitstream contains the data for two channels of PCM audio.

  • Page 29: Figure 2-9 Cat. No. 790 S/Pdif Connections

    In a CP650 equipped with a Cat. No. 790 board, the input type is S/PDIF. See Figure 2-9 for connector hookup details. Refer to Table B-2 for signal Option Card I/O definitions.

  • Page 30: Digital Audio Inputs-General Information

    ® Dolby CP650 Installation Manual Installation 2.5.6 Digital Audio Inputs—General Information There are two professional interface formats used for digital audio: AES/EBU (also known as AES3) and AES-3id. These stream the same digital data and professional audio header information over copper conductor links, but use different types of conductors and connectors.

  • Page 31: Table 2-2 Examples Of Available Balanced ↔ Unbalanced Adapters

    CP650. However, if you intend to connect sources across different types of digital audio inputs, do not attempt to convert a digital interface type by, for example, directly wiring an XLR connector to a BNC or RCA plug.

  • Page 32: Exploded View And Board Locations

    (No bypass function on CP650DC models) Front-Panel Mounting Screw Figure 2-11 Model CP650 Exploded View Disassembly steps can be found in the troubleshooting section of this manual. (See Section 9.3.2.) 2.5.8 Installation Wiring Diagrams See the following pages for CP650 connection diagrams. 2-12...
  • Page 33 75 pF per meter. For two conductor with shield wiring, use Belden 8451 All shields must be connected to the CHASSIS of the CP650. Two-conductor shielded cable or equivalent: tinned copper, This achieves the required RF interference immunity. A metal...
  • Page 34 75 pF per meter. For two conductor with shield wiring, use Belden 8451 All shields must be connected to the CHASSIS of the CP650. Two-conductor shielded cable or equivalent: tinned copper, This achieves the required RF interference immunity. A metal...
  • Page 35 Subwoofer Notes: Follow all local electrical and building codes. All shields must be connected to the CHASSIS of the CP650. This achieves the required RF interference immunity. A metal Use grounded (earthed) conduit wherever possible. Avoid housing must be used for all D-connectors and the shields routing signal wiring near electric motors, rectifiers, power must be connected to the housing.
  • Page 36 Subwoofer Notes: Follow all local electrical and building codes. All shields must be connected to the CHASSIS of the CP650. This achieves the required RF interference immunity. A metal Use grounded (earthed) conduit wherever possible. Avoid housing must be used for all D-connectors and the shields routing signal wiring near electric motors, rectifiers, power must be connected to the housing.
  • Page 37 ® Dolby CP650 Installation Manual Installation AUTOMATION CP650 SERIAL DATA (RS-232) MIC. INPUT Digital Cinema Processor LISTED San Francisco U.S. Wootton Bassett U.K. ETHERNET PROFESSIONAL AUDIO EQUIPMENT 4J06 MUTE READER 1 NONSYNC MOTOR START REMOTES AND AUD. FADER Dolby Digital...
  • Page 38 ® Dolby CP650 Installation Manual Installation AUTOMATION SERIAL DATA CP650DC (RS-232) MIC. INPUT Digital Cinema Processor San Francisco U.S. Wootton Bassett U.K. LISTED ETHERNET PROFESSIONAL AUDIO EQUIPMENT 4J06 MUTE NONSYNC REMOTES AND AUD. FADER Dolby Digital OPTION CARD I/O NONSYNC IN 1...
  • Page 39 ® Dolby CP650 Installation Manual Installation AUTOMATION CP650 SERIAL DATA (RS-232) MIC. INPUT Digital Cinema Processor San Francisco U.S. Wootton Bassett U.K. LISTED ETHERNET PROFESSIONAL AUDIO EQUIPMENT 4J06 MUTE READER 1 NONSYNC MOTOR START REMOTES AND AUD. FADER Dolby Digital...
  • Page 40 ® Dolby CP650 Installation Manual Installation AUTOMATION CP650DC SERIAL DATA (RS-232) MIC. INPUT Digital Cinema Processor San Francisco U.S. Wootton Bassett U.K. LISTED ETHERNET PROFESSIONAL AUDIO EQUIPMENT 4J06 MUTE NONSYNC REMOTES AND AUD. FADER OPTION CARD I/O NONSYNC IN 1...

  • Page 41: Chapter 3 Front-Panel And Alignment Overview

    It is ® useful to develop an understanding of why the CP650 is aligned as described in this manual. If the installer is already familiar with the CP650 and these principles, or is in a hurry to complete the installation, this chapter may be read later. Continue the setup procedure beginning with the next chapter.

  • Page 42: Figure 3-2 Front-Panel Display Showing All Possible Channels Active

    Day-to-day operation of the CP650 is performed through interaction with this display. The 20-character, four-line LCD provides a readout of processor condition and operation mode. It can be used by the service engineer to align the CP650 if PC setup software is not used.

  • Page 43: Figure 3-3 Front-Panel Display Showing A Dolby Digital Film Playing

    6 or lower. If the digital error rate exceeds 8, or if the display shows F (data not readable) or “–”(no digital soundtrack), the CP650 automatically switches to playing the film’s analog soundtrack until usable data appears.

  • Page 44: Figure 3-5 Front-Panel Display When Running Earlier Software

    ® Dolby CP650 Installation Manual Front-Panel and Alignment Overview 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. Dolby Digital Surround EX board installed: Not installed:...

  • Page 45: Figure 3-6 Fader Characteristic

    CP650DC models). Power Supply Button This button operates the main power supply for the CP650. As with other Dolby cinema processors, the CP650 (except CP650DC models) incorporates a separate backup (bypass) power supply to power a basic film playback path. A red LED built into the switch is activated when the unit is powered from the bypass supply.

  • Page 46: Figure 3-7 Cp650 Operation And Setup Menu Control Buttons

    The right-hand button is used to accept the setting displayed on the front-panel screen and store it in CP650 memory. Any changes to settings will occur immediately, but will not be saved until this button is pressed. Leaving the current menu before pressing the button will cause the change to be discarded.

  • Page 47: The Setup Control Panel

    These two potentiometers, located on the Cat. No. 772B card, set the CP650 output level when the unit switches to bypass operation. The HF control is used if the CP650 is equipped with a Cat. No. 791 Crossover Card. Earlier units used the Cat. No. 772...
  • Page 48 These test points are provided to allow rapid access to the required signals used during CP650 setup. Each test point is a 2 mm diameter female socket that accepts a 2 mm male test pin. Test point pins can be obtained in the USA from Pomona Electronics.

  • Page 49: Power Supply Voltage Test Points

    ® Dolby CP650 Installation Manual Front-Panel and Alignment Overview Power Supply Voltage Test Points Six test points are located behind the front panel for measuring power supply voltages. They can be accessed by removing the front panel. See Section 9.3.1 for the voltage test ranges.
  • Page 50    ...

  • Page 51: Chapter 4 B-Chain Alignment

    This is especially true if the system uses active crossovers with biamp equipment. If your CP650 is equipped with a Cat. No. 791 Crossover Card, please refer to Section 4.4 for information on settings.

  • Page 52: Microphone Placement

    45 degrees upward toward the screen. Route the output cable to the CP650 and connect it to the microphone connector on the rear panel or front setup panel (XLR on the rear panel or nine-pin D-connector input on the front setup panel).

  • Page 53: Initial Setup

    Caution: The following steps will cause the CP650 to output pink noise to the power amplifiers. The CP650 output levels may be set too high. If you are unsure of the settings on your unit, turn off the power amplifiers before selecting the Calibrate SPL menu item shown in Section 4.4.

  • Page 54: Sound Pressure Level Calibration

    B-Chain Alignment Sound Pressure Level Calibration If your CP650 is equipped with a Cat. No. 791 Crossover Card, an initial setup is required before you begin the SPL calibration. If you do not have a Cat. No. 791 installed, skip to Section 4.4.2.
  • Page 55 CP650 Installation Manual B-Chain Alignment The CP650 is shipped from the factory with the mic input-level control set to minimum. If necessary, adjust the mic input-level pot until the center area of the displayed pink noise moves to the middle of the scope screen. The trimpot is accessible through an opening in the setup panel.

  • Page 56: Initial Output-Level Calibration

    Note: If pink noise is not being generated, this indicates that the status of the digital input has changed. If you are using the digital input on the CP650, either disconnect or power down the device attached to the digital input during calibration.

  • Page 57: Subwoofer Channel

    ® Dolby CP650 Installation Manual B-Chain Alignment When all channels have been adjusted, press . Saving Saving Changes..Changes appears on the front-panel screen. Note: If is pressed before , all of the level settings will be lost. 4.5.2 Subwoofer Channel The initial subwoofer level adjustment uses a displayed RTA reference line, established from the Center channel pink-noise level.

  • Page 58: Crossover Setup-Cp650 With Cat. No. 791

    B-Chain Alignment Crossover Setup—CP650 with Cat. No. 791 If your CP650 is not equipped with a Cat. No. 791 Crossover Card, please skip to the next section. Two jumpers, located on the Cat. No. 772B board, must be set to their enabled position when a Cat.
  • Page 59 ® Dolby CP650 Installation Manual B-Chain Alignment The following parameters must be set before adjusting the room equalization in your auditorium: • Crossover mode (2-Way or 3-Way) • Left Extra (Le) and Right Extra (Re) screen channel support (available only in 2-Way and Full Range crossover modes) •...
  • Page 60 ® Dolby CP650 Installation Manual B-Chain Alignment Setting Butterworth Filter Characteristics The crossover filters designed into the Cat. No. 791 are adjustable to allow tailoring of the response to your particular system. For most applications, the default crossover filter, Linkwitz-Riley, should be used. The slopes in this filter are not adjustable. The filter has two cascaded two-pole Butterworth filters for the lowpass side, and a three- pole filter for the highpass side at the crossover point.
  • Page 61 ® Dolby CP650 Installation Manual B-Chain Alignment Setting Crossover Corner Frequency Press to move the arrow to the parameter (Param) Crossover Config: Channel: Left selection, then rotate the front-panel knob to select the lowpass >Param : Freq Lo Value : 400 filter corner frequency parameter (Freq Lo).
  • Page 62 ® Dolby CP650 Installation Manual B-Chain Alignment Setting Output Delay The delay settings must be adjusted to compensate for different physical mounting positions of the speaker drivers. Press to move the arrow to the parameter (Param) Crossover Config: Channel: Left selection, then rotate the front-panel knob to select the low- >Param...

  • Page 63: Room Equalization

    Q (center width), and level of cut, using a single-band parametric equalizer circuit. If your CP650 is equipped with an optional Cat. No. 791 Crossover Card, there are additional steps to perform before setting room equalization. See Section 4.7.1.

  • Page 64: Setting Coarse Eq

    ® Dolby CP650 Installation Manual B-Chain Alignment While observing the RTA display on the oscilloscope, rotate Crossover Levels the front-panel knob until the mid-frequency bands are at the Channel: Left >Level: same approximate level as the low-frequency bands. Press to move the arrow to the Channel selection, and Crossover Levels >Channel: Center Hi...

  • Page 65: Setting Fine Eq

    Turn the front-panel knob (with no button pressed) to select the active band. The CP650 LCD screen cursor (line) blinks to indicate which band is active. When the front-panel knob is rotated to select frequencies at the far left or right side of the LCD screen, the displayed bands will scroll left or right to show the low- or high- frequency bands.

  • Page 66: The Eq Assist Feature

    ® Dolby CP650 Installation Manual B-Chain Alignment Shortcuts: • Spin the front-panel knob counterclockwise (more than 100 = Flat steps) to set the equalization to flat (no boost, no cut). • Spin the front-panel knob clockwise (more than 100 steps) to activate the EQ Assist feature.

  • Page 67: Setting Subwoofer Channel Eq

    ® Dolby CP650 Installation Manual B-Chain Alignment 4.7.5 Setting Subwoofer Channel EQ Equalization facilities for the Subwoofer channel are different than for the other channels. This process is designed to correct the principal room resonance in the operating range of the subwoofer. The subwoofer equalizer is a cut-only filter, with adjustable frequency (25 to 125 Hz), Q (center width, selectable between four values), and amount of cut (0 to 12 dB).

  • Page 68: Final Output-Level Calibration

    If pink noise is not being generated, this indicates that the status of the digital input has changed. If you are using the digital input on the CP650, either disconnect or power down the device attached to the digital input during level setting. A change in the digital input bitstream will cause the CP650 to mute the pink noise during level setting.
  • Page 69 ® Dolby CP650 Installation Manual B-Chain Alignment Optical Subwoofer Bandwidth This menu item sets the upper frequency limit of the Subwoofer channel to either 50 or 100 Hz. The recommended setting depends on the type of screen speakers in your cinema.

  • Page 70: Final Sound Check-Rotating Pink Noise

    CP650 Installation Manual B-Chain Alignment Final Sound Check—Rotating Pink Noise 1 2 3 4 5 6 8 Slide DIP switch 6 down to the normal position. The CP650 will switch to normal operation with the user menu choices available. Rotating Noise Press...

  • Page 71: Chapter 5 A-Chain Alignment

    The A-chain optical level is calibrated with the Cat. No. 69T Dolby Tone test film. This film is used to establish the correct Dolby operating level within the CP650. A Cat. No. 69P pink-noise test film is used for A-chain frequency response and soundhead alignment.

  • Page 72: Projector Checkup

    ® Dolby CP650 Installation Manual A-Chain Alignment Projector Checkup Clean the optical surfaces with a cotton swab moistened with glass cleaner. Inspect the film guides for evidence of cuts, cracks, surface defects, or any foreign materials that could impair smooth film guiding.
  • Page 73 Confirm that the cell wiring and connections are correct. Shielded cables must be used. The inner conductors must be wired to the CP650 optical input connectors exactly as shown on the wiring diagram. See the wiring diagram on page 2 -13.

  • Page 74: Dolby Level Set

    Thread and play a Dolby test film, Cat. No. 69T, on projector 1. The film emulsion should face away from the screen. Verify that the signal presence LEDs on the CP650 setup panel are illuminated. The Dolby tone signal should be visible on the oscilloscope.

  • Page 75: Manual

    ® Dolby CP650 Installation Manual A-Chain Alignment 5.3.2 Manual To set Dolby level manually, press to return to the Manual Optical Level Adjust Automatic Optical Level Adjust screen, then press Projector 1 Press OK When Ready. twice to move to Manual Optical Level Adjust for projector 1.

  • Page 76: Film-Path Alignment Check

    ® Dolby CP650 Installation Manual A-Chain Alignment Film-Path Alignment Check 1 2 3 4 5 6 8 SIGNAL PRESENT Connect the oscilloscope to the Lt and Rt test points. Video Clamp RTA1 RTA2 Mic Bypass Ch 1 Thread and play a SMPTE buzz track test film. This film...

  • Page 77: Cell Wiring Check

    (nearer the outside of the projector) and verifying that the level of the Right channel drops, as indicated by the LED on the CP650 setup panel. Signal Present If the film path, optics, or LED/exciter lamp were adjusted, repeat the previous film- path alignment and cell alignment steps.

  • Page 78: Focus Check

    ® Dolby CP650 Installation Manual A-Chain Alignment Focus Check 1 2 3 4 5 6 8 SIGNAL PRESENT Video Clamp RTA1 RTA2 Connect the scope to test points. Mic Bypass RTA1 RTA2 Ch 1 Ch 2 Oscilloscope Press to move to the Optical Focus adjust menu. The...

  • Page 79: Optical Hf Equalization (Slit-Loss Eq)

    A-Chain Alignment Optical HF Equalization (Slit-Loss EQ) This step adjusts the high-frequency response of the optical preamplifier circuit. The CP650 provides both automatic and manual facilities for optical, or slit-loss, high- frequency equalization. The Auto menu appears first. 5.9.1 Auto Slit-Loss EQ Play the Cat.
  • Page 80 ® Dolby CP650 Installation Manual A-Chain Alignment When the desired response has been achieved, press to save the settings. After saving the settings, the display returns the Manual Slit-loss EQ Projector 1 menu. If a second projector is installed, press to move to the Manual Slit-loss EQ Projector 2 menu, and repeat the procedure.

  • Page 81: Chapter 6 Digital Soundheads

    ® Dolby CP650 Installation Manual Chapter 6 Digital Soundheads Note: CP650DC models for digital cinemas do not incorporate 35 mm film sound support. Skip this chapter if you are installing any of these models. Mechanical Alignment Mechanical alignment of the digital soundhead consists of confirming that the film path through the digital soundhead is aligned with the path through the projector.

  • Page 82: Adjustment With Oscilloscope

    1. Make sure power to the digital soundhead is provided. Power to the CP650 should also be on. 2. Open the CP650 front-panel setup access door.

  • Page 83: Led Brightness Confirmation And Adjustment

    ® Dolby CP650 Installation Manual Digital Soundheads Figure 6-2 Digital Video Oscilloscope Image—Focus Adjustment LED Brightness Confirmation and Adjustment The optimum peak video signal voltage (unobstructed light through the perf hole) is 4 V, measured from the 0 V reference baseline to the upper trace.

  • Page 84: Cat. No. 701 Reader

    ® Dolby CP650 Installation Manual Digital Soundheads The video level indicator colors and video levels are: Signal too low <1.5 V Green Optimum signal 1.5–4.5 V Orange Signal too high >4.5 V With proper LED light output, the indicator is green. To adjust the light level for the...

  • Page 85: Chapter 7 Final Adjustments

    Normal and Bypass modes. If your CP650 is equipped with a Cat. No. 791 Crossover Board, both the Main bypass trimpots must be adjusted. The real-time analyzer hookup should be used for accurate setting.

  • Page 86: Optical Surround Level Trim

    > xxx mSec Optical Surround Delay menu item. Note: If the optical surround delay has been set during a previous CP650 system setup, write down the current delay setting displayed. Rotate the front-panel knob counterclockwise to set the delay to...

  • Page 87: Setting Optical Surround Delay

    20 ms after the arrival of sound from the front speakers. The delay is adjustable from 20 to 150 ms, in 1 ms steps. The setting is stored to CP650 memory using the procedure outlined below. Use the following formula to calculate the...

  • Page 88: Setting Digital Surround Delay

    Setting Digital Surround Delay The CP650 automatically calculates a typical digital surround delay based on the optical surround delay setting performed in the previous section. Actual theatre geometry affects the amount of surround delay required; you may, therefore, wish to set the delay manually.

  • Page 89: Setting Dolby Digital Reader Delay

    In the CP650, this delay is set by entering the number of film perforations within the range from 12 perfs (approximately 160 ms delay) to 512 perfs (approximately five seconds).

  • Page 90: Table 7-3 Typical Delay Settings For Penthouse Digital Film Readers

    Both optical and digital audio are present while the > xxx Perforations CP650 is set to this menu item. The audio contains equal digital and optical sound simultaneously. Rotate the front- panel knob to set the number of perfs that produce a minimum delay between the...

  • Page 91: Dolby Digital Video Level Check

    On CP650s running software v.2.2 and later, the digital film reader output levels can be checked. Note: Your CP650 must be capable of decoding Dolby Digital film soundtracks to use this feature. If your cinema processor is a Model CP650SR, you must first install a Cat.

  • Page 92: Mono Level Trim

    7.10 Assigning Default Level and Global Delay to Front-Panel Buttons Preset fader levels and system delay can be assigned to each CP650 format button. Global audio delay allows you to set additional delay, adding to the built-in CP650 processing latency, for synchronization of the audio with the picture in digital cinema systems.

  • Page 93: 7.11 Assigning Front-Panel Buttons To Formats

    Option Card I/O desired. Auto mute causes the CP650 outputs to mute automatically if a Dolby Digital bitstream input is not present. When a PCM input bitstream is detected, the CP650 outputs will mute. Use this option with caution. Format 80/81...

  • Page 94: 7.13 Reversion Mode

    PCM Auto Mute (Disabled or Enabled) and PCM Dolby Pro Logic Decode (L/R Stereo or Pro Logic). Note: Be aware that enabling PCM auto mute will not allow the CP650 to play back any PCM content.

  • Page 95: 7.16 Running Auditorium Assist

    EQ settings or sound equipment have been made. The initial measurements should be performed after the CP650 theatre installation is complete, with seats, carpet, screen, and room treatment all installed. Auditorium conditions should include the following: •...

  • Page 96: Establish Reference Measurements

    The channel being measured is Press OK to cancel displayed. The CP650 outputs pink noise at 85 dBC for the L, C, and R channels; 82 dBC for each of the surround channels; and +10 dBr for the subwoofer.

  • Page 97: Auditorium Sound Check

    The channel being measured is displayed. The Press OK to cancel CP650 outputs pink noise at 85 dBC for the L, C, and R channels; 82 dBC for each of the surround channels; and +10 dBr for the subwoofer.

  • Page 98: Headroom Configuration

    Noise Floor Optimization Noise Floor Optimization calculates and utilizes any available leftover capacity in each channel to improve the overall noise floor of the CP650. It operates by measuring the extent to which the unit uses the available headroom in the B-chain, then boosts the overall gain in the digital domain to use all available headroom.
  • Page 99 The CP650 is designed to process a 0 dB signal as a full-scale digital signal (0 dBFS). Normal operation produces a –12 dB insertion loss in the B-chain. This allows for +6 dB boost in the EQ, and up to +6 dB additional boost by the fader (above nominal 7.0) without causing numerical overflows (digital clipping) within the internal digital...

  • Page 100: 7.17 Dialogue Normalization

    7.18 Network Configuration A CP650 can be controlled via an Ethernet-based network using a PC connected to the CP650 through a hub or switch, or directly, using a network crossover cable. See Appendix D.1, Control via Serial Port for further information.

  • Page 101: 7.19 Clock Set

    1 2 3 4 5 6 8 Slide DIP switch 6 to the normal (down) position. The CP650 will switch to normal operation with the user’s menu choices available. Press , or press and hold the button while rotating the Mute Fade-in Time >x.x Seconds...

  • Page 102: 7.22 Auto Dolby Digital Function

    (Mono), format 04 (Dolby A-type), or format 05 (Dolby SR), and a Dolby Digital soundtrack is sensed, the CP650 will switch to the format 10 (Dolby Digital) target button. The format 10 target button is assigned in the user’s setup menu area.

  • Page 103: Chapter 8 Accessories

    • The combined length of connecting cable to all the remote units should not exceed 100 m (300 ft). • When you connect one or more remote units to the CP650, all units are live and communicate with each other. Any fader level adjustment changes the display on all of the connected units.

  • Page 104: Cat. No. 779 Remote Control Unit Installation

    Use a two-conductor shielded cable (Belden 8451 or equivalent) to connect the remote to the CP650. To prevent wear on the cable from the metal edge of the hole you create, use a rubber or neoprene grommet on the cable. The diameter of the hole you make should be the same as the diameter of the cable grommet or conduit bushing.

  • Page 105: Connect To The Circuit Board

    CP650 Installation Manual Accessories The wire to the CP650 must run from the connection point on the circuit board without touching any circuit-board components. • If the remote control will be mounted in a console or on a wall, we recommend placing the hole in the bottom of the housing.

  • Page 106: Set The Address Switch

    Dolby CP650 Installation Manual Accessories 8.1.4 Set the Address Switch For the CP650 to communicate with all the remote units, each unit must be set to a unique address number using switch SW1. Interface connector SWITCH SIDE VIEW switch SW1 to any...

  • Page 107: Connect To The Cp650

    Cat. No. 779 DATA Figure 8-5 Connection of Remotes to the CP650 You can confirm that remote units are connected and communicating with the CP650 by selecting the Remote Addresses menu on the CP650: Press multiple times, or press and hold the button while rotating the front- panel knob, to move to the Remote Addresses menu.

  • Page 108: Cat. No. 771 Remote Fader Installation

    Use a two-conductor shielded cable (Belden 8451 or equivalent) to connect the remote to the CP650. To prevent wear on the cable from the metal edge of the hole you create, use a rubber or neoprene grommet on the cable. The diameter of the hole you make should be the same as the diameter of the cable grommet or conduit bushing.

  • Page 109: Chapter 9 Maintenance And Troubleshooting

    Digital print format has robust error correction information encoded ® along with the audio data, and the CP650 uses a powerful digital error correction technique, allowing the data to be read perfectly even if scratches and dirt are present. However, the best performance will be obtained if the print is kept clean. Standard film cleaners will provide good results.

  • Page 110: Cp650 Troubleshooting

    ® Dolby CP650 Installation Manual Maintenance and Troubleshooting The tension arm rollers on earlier Dolby Digital film readers Cat. Nos. 701, 700, and 699 may begin to show wear and need replacement. A replacement rollers kit is available for upgrading your unit.

  • Page 111: Exploded View And Board Locations

    Caution: Many components used on the circuit boards are sensitive to electrostatic damage. It is essential to wear a grounding strap while handling or changing CP650 circuit boards. To gain access to the CP650 circuit boards: 1. Remove the AC mains power cable. 2. Open the setup control-panel access door.

  • Page 112: The Event Log

    Maintenance and Troubleshooting 9.3.3 The Event Log The event log stores entries on the operation of the CP650. It can be useful in troubleshooting or tracking subtle system failures. Also, Auditorium Assist fail parameters are stored in the event log. (See Section 7.16.3.) Normally, a single log entry occurs every time the CP650 powers on.
  • Page 113 No power to either main or bypass systems. button not glowing. Press main power button. If CP650 still does not come on, check fuse behind plastic door in AC mains power inlet module located on the rear of the unit.
  • Page 114 Left and Right power amplifiers working? channels by equal amounts. Turn on the CP650 with the front-panel power button. Call Power button illuminated. Front panel System is in Bypass mode. service engineer if the system is still not operating dark.
  • Page 115 Analog remote fader is selected and being changed. CONTROL PROBLEMS CP650 doesn’t have the optional modules needed for that format, or that part of the system is not working. For Obtain and install the necessary circuit boards. If they are...
  • Page 116 Redirect the light from the offending source or keep it off during a showing. • If the hum still is present, the problem is either in the grounding or wiring or in the CP650. Call your service engineer.
  • Page 117 Wiring from the stereo solar cell to the CP650. Check that the wiring from the stereo solar cell to the CP650 has not become damaged and that the solder connections to the fanning strip are secure. Check that the D-connector for the solar cell is firmly plugged into the CP650.
  • Page 118 ® Dolby CP650 Troubleshooting Chart Maintenance and Troubleshooting Symptom Probable Cause Recommended Action The sound from two or more channels is If two distorted channels are served by the same two- distorted and you can hear the distortion Malfunctioning two-channel power amplifier.
  • Page 119 If changing both the device and distorted. the selection does not eliminate the distortion, the problem is in the CP650, probably on the Cat. No. 772B board. Defective Cat. No. 772B board. Call service engineer.
  • Page 120 Defective Cat. No. 772B board. Call service engineer. Unplug the D-connector from the back of the CP650. If you can exercise local control over the CP650, the problem With an automation system connected to...
  • Page 121 ® Dolby CP650 Troubleshooting Chart Maintenance and Troubleshooting Symptom Probable Cause Recommended Action If possible, check that the diode is installed across the You can hear pops or thumps during If the projector changeover relay power is DC, a diode relay winding.
  • Page 122 ® Dolby CP650 Power Supply Wiring Maintenance and Troubleshooting TO CAT.NO.775 J14 BACKPLANE POWER CONNECTOR FRONT PANEL BUTTON BYPASS BYPASS_GND CAT.NO.795 SNUBBER / TERMINAL BOARD GRAY -14VB PINK +5VB AC MAINS FUSE +14VB FROM CAT.NO.792 J2 BYPASS REGULATOR MAINS POWER...
  • Page 123 ® Dolby CP650 Power Supply Wiring Maintenance and Troubleshooting TO CAT.NO.775 J14 BACKPLANE POWER CONNECTOR FRONT PANEL BUTTON BYPASS BYPASS_GND CAT.NO.795 SNUBBER / TERMINAL BOARD GRAY -14VB PINK +5VB AC MAINS FUSE +14VB FROM CAT.NO.792 J2 BYPASS REGULATOR MAINS POWER...
  • Page 124 ® Dolby CP650 Power Supply Wiring Maintenance and Troubleshooting TO CAT.NO.775 J14 BACKPLANE POWER CONNECTOR BYPASS_GND MAINS INLET / FILTER MODULE GRAY -14VB PINK +5VB 250 VAC FUSE +14VB FROM CAT.NO.792 J2 BYPASS REGULATOR MAINS POWER FILTER T 6.3A L...
  • Page 125 ® Dolby Digital Readers Exploded View Maintenance and Troubleshooting DOWEL 1/8” DIA X 1/2” LG DPN 6501570 SCREW M3 X 6 CAP SKT BLK 2-PL DPN 6002300 2-PL DOWEL 1/8” DIA X 3/4” LG HOUSING ASSY CAT702Z DPN 6501580 DPN 8304550 SCREW M4 X 14 SET SKT CUP SST (NOT SHOWN) SCREW M4 X 6 PAN POZI BLK...
  • Page 126 ® Dolby Digital Readers Exploded View Maintenance and Troubleshooting SCREW M3 X 6 BTN SKT BLK SPRING ARM DPN 6001800, 2-PL DPN 6701740 WASHER M3 FLAT FENDER SST DPN 6102140, 2-PL CABLE CLAMP DPN 7901200 WASHER 1/4" FLAT SS SCREW M4 X 12 CAP SKT BLK DPN 6102060, 2-PL FS DPN 6002290 SPRING K=1.6 LB/IN 1-3/8"...
  • Page 127 ® Dolby Digital Readers Exploded View Maintenance and Troubleshooting DOWEL 1/8” DIA X 1/2” LG DPN 65157 2-PL HOUSING ASSY SCREW M3 X 6 CAP SKT BLK CAT. NO. 534 DPN 83319 DPN 60230 HOLE PLUG 3/8" DOWEL 1/8” DIA X 3/4” LG RV1 LED CURRENT DPN 65199 2-PL...
  • Page 128 ® Dolby Digital Readers Exploded View Maintenance and Troubleshooting SPRING ARM DPN 67174 SCREW M3 X 6 BTN SKT BLK SCREW M4 X 12 CAP SKT BLK DPN 60180, 2-PL DPN 60229 SPRING K=1.6 LB/IN 1-3/8" LONG WASHER M3 FLAT 2-PL DPN 65155 DPN 61214, 2-PL...

  • Page 129: Appendix A Software Operations

    Press multiple times, or press and hold the button while rotating the front-panel knob, to move to the About this CP650 screen. This menu is made up of four menu screens. The first information screen displays the version number of the About this CP650: System v.a.b.c.d...
  • Page 130 Dolby CP650 Installation Manual Software Operations Updating CP650 Software 1. Connect the PC to the CP650 using a serial cable to the CP650 serial data connector on the front setup panel (or on the rear panel). SERIAL DATA MIC MUX...
  • Page 131 7. Save the retrieved settings to disk. The file name should end with the .dby extension. 8. Unplug the serial cable from the source CP650 and plug it into the destination CP650. Note: If you have closed the CP650 setup program or opened another settings parameter file (.dby), then before continuing, you must select...
  • Page 132    ...

  • Page 133: Appendix B Rear-Panel Connectors

    Cat. No. 790 Dolby Digital Surround EX decoder board installed (standard model ® CP650), the Left Surround and Right Surround outputs on this connector are disabled. All surround channel audio outputs appear on the connector. Option Card I/O Table B-1 Main Audio Output Connector Pinout...

  • Page 134: Table B-2 Option Card I/O Connector Pinout With Cat. Nos. 790, 791, Or 794 Installed

    ® Dolby CP650 Installation Manual Rear-Panel Connectors Option Card I/O Connector The pinout of this connector is determined by the type of option board installed in the connectors of the Cat. No. 774A system controller board. In CP650DC models, the Cat. No. 790 Dolby Digital Surround EX Decoder/Digital Input Card is shipped in this location.

  • Page 135: Table B-3 Option Card I/O Connector Pinout With Cat. No. 778 Installed

    ® Dolby CP650 Installation Manual Rear-Panel Connectors The optional Cat. No. 778 card has five pairs of AES inputs, the first of which provides a single digital bitstream input (Dolby Digital or PCM), or up to ten channels of digital PCM audio input. The card provides ten channels of digital audio outputs, while supporting the Dolby Digital Surround EX audio format.

  • Page 136: Table B-4 Dolby Digital Reader Input Connector Pinout

    These connectors are used for connecting up to two Dolby Digital film soundtrack readers to the CP650 or CP650D. These connections are inactive on Model CP650SR. The pinout and the signals on these connectors are identical to the Dolby DA20 Digital Film Sound Processor and CP500D Digital Cinema Processor.

  • Page 137: Table B-5 Motor Start Connector Pinout

    Motor Start CP650 with the theatre control system. If the CP650 is to be used in a platter operation (single projector), a jumper must be installed on this connector between pins 1 and 5.

  • Page 138: Table B-8 Front-Panel Mic Multiplexer Or Eq Mic Connector Pinout

    An EQ microphone or mic multiplexer can be connected at this location without the need for access to the CP650 rear panel. Pins 1, 2, and 5 are wired in parallel with the rear-panel microphone input XLR connector. If you wish to use a connector already wired for use with a Dolby CP500, add a jumper between pins 5 and 6.

  • Page 139: Table B-10 Six-Channel Analog Audio In Connector Pinout

    Six-Channel Analog Audio Input Connector This input is an unbalanced analog audio input. The nominal reference level is approximately 300 mV. There are no input level trim controls within the CP650 for this input. Table B-10 Six-Channel Analog Audio In Connector Pinout...

  • Page 140: Table B-11 Automation I/O Connector Pinout

    ® Dolby CP650 Installation Manual Rear-Panel Connectors B.3 I/O Connectors Automation I/O Connector This connector is a 25-pin female D-connector, wired to closely match the configuration of the Dolby Model CP65. Table B-11 Automation I/O Connector Pinout Connection Specification S0 (automation select) Button 01...

  • Page 141: Table B-12 Automation I/O Connector Pins Used For Noise Gating

    Connected to pin 8 Connected to pin 7 No connection Ethernet Connector The CP650 can be controlled via an Ethernet-based network using a PC connected to the CP650 through a hub or switch, or directly, using a network crossover cable.
  • Page 142    ...

  • Page 143: Appendix C Format Descriptions

    CP650 Installation Manual Appendix C Format Descriptions Each format supported by the CP650 is described in Section C2. More specifically, each listing describes the audio processing applied by each format for any Dolby ® cinema processor. Table C-1 describes the channel designations.
  • Page 144 Format Descriptions Format Definitions The formats supported by the CP650 are described below. If a format name is too long for display on the CP650 front panel (limited to 19 characters), a shorter name is given. Format 01 Academy Mono Optical Short name: Mono Audio Description—Optical mono audio comes in on either projector’s optical input,...
  • Page 145 Ls, Bs (which is copied into the Bsl and Bsr channels), and Rs. The out-of-phase information is discarded. The audio for the screen channels and subwoofer is output via the CP650’s main audio outputs, and the audio for the four surround channels is output via the D-connector.
  • Page 146 The L and R channels are passed to Nonsync In 1 the L and R outputs of the CP650. The L and R channels are also passed to the Dolby Pro Logic decoder, with only the surround signal being utilized and sent to the ®...
  • Page 147 ® Dolby CP650 Installation Manual Format Descriptions Format 64 Public Address Center Channel Short name: Public Address, C Audio Description—A single channel is input through the microphone input connector. The audio output is sent to Center only. Format 65 Public Address Surround Channels Short name: Public Address LsRs Audio Description—A single channel is input through the microphone input...
  • Page 148 80/81 PCM Options screen. This screen also contains a PCM Auto Mute option that causes the CP650 to mute automatically if it does not detect a Dolby Digital bitstream. This prevents noise when working only with encoded bitstream audio. For Dolby Digital bitstreams, the metadata contained in the bitstream specifies the channel format and surround processing to be applied.
  • Page 149 There are two additional output channels labeled Le and Re. These are input on S/PDIF input 4 and output on the L and R mid-frequency analog outputs. In order to use this format, the CP650 must be configured for 2-Way or full-range crossover operation, and Le/Re mode must be enabled.
  • Page 150 Ls, Bs (which is copied into the Bsl and Bsr channels), and Rs. The out-of-phase information is discarded. The audio for the screen channels and SW is output via the CP650’s main audio outputs, and the audio for the four surround channels is output via the connector.
  • Page 151 ® Dolby CP650 Installation Manual Format Descriptions Format 90 (Cat. No. 778 or 790 required) 7-Channel PCM Audio Description—This format is used to input seven discrete channels (L/R, C/LFE, Ls/Rs, and Bs) as would exist in a preencoded Dolby Digital Surround EX mix.

  • Page 152: Table C-2 Format Characteristics Chart

    ® Dolby CP650 Installation Manual Format Definitions Table C-2 Format Characteristics Chart Sub Output Optical Required Format Noise Subwoofer Level Downward Surround Format Name Option 2 Input Decode Subwoofer Surrounds Number Reduction Lowpass Referenced to Expander Level board Center Offset...
  • Page 153 ® Dolby CP650 Installation Manual Format Definitions Sub Output Optical Required Format Noise Subwoofer Level Downward Surround Option 2 Format Name Input Decode Subwoofer Surrounds Number Reduction Lowpass Referenced to Expander Level Board Center Offset Cat. No. 778 AES1 Auto-detect/decode PCM, Dolby...
  • Page 154    ...

  • Page 155: Appendix D External Control

    CP650 Installation Manual Appendix D External Control The CP650 can be controlled via the Ethernet port, by devices connected to the RS-232 serial data connector, or to the rear-panel Remotes and Auditorium Fader connector. For control via the Ethernet port, see the configuration settings in Section 7.18.

  • Page 156: Table D-1 Remote Commands

    <see above> “auditorium” If changed via this serial interface, If “auditorium” is selected, the main shaft this setting is lost at the next CP650 fader is disabled as are any attached remotes restart. (Cat. No. 779, Cat. No. 771). format_button 0 ..

  • Page 157: Table D-2 Remote Command Examples

    Serial Data port is in use by the CP650 setup or reader alignment programs. 2. The interface operates in raw serial mode. Characters are not echoed back to the controller, and control characters are ignored.
  • Page 158 While this was never intended to be a feature of the remote port, it may be possible to command the CP650 to change the fader level, select any one of the eight front-panel formats, and to toggle the mute status.
  • Page 159 The CP650 supports remote accessory device addresses 1–9. The CP650 has intentionally added one nonstandard modification to the DDCMP protocol. If the CP650 sends out the hex value FF 20 times in a row, all remote accessories should recycle themselves to their power-on state. This includes resetting themselves to the ISTRT state, and attempting to reestablish the link.
  • Page 160 CP650. The value will be between 1 and 8, corresponding to the front- panel buttons as described above. The next most significant bit tells whether the CP650 is muted (0 = not muted, 1 = muted). The next most significant bit tells which projector is in use (0 = projector 1, 1 = projector 2).
  • Page 161 ® Dolby CP650 Installation Manual Appendix E Setup and User Menus 1 2 3 4 5 6 8 CP650 Setup Menu DIP switch 6 UP The Bsl and Bsr channels (shown in italics) are available only with Cat. No. 790 installed. The Le and Re channels (shown in italics) are available only with Cat.
  • Page 162 ® Dolby CP650 Installation Manual Setup and User Menus CP650 Setup Menu, B-Chain (Continued) menu menu Notes EQ center frequency: 25–125 Hz Subwoofer EQ Adjust EQ filter width (“Q”): 0.5, 1, 2, 4 Level Cut: 0 to –12 dB Channel:...
  • Page 163 ® Dolby CP650 Installation Manual Setup and User Menus CP650 Setup Menu, A-Chain (Continued) (The shaded menu items do not apply to CP650DC models) menu menu Notes OK = Bypass/Normal toggle Set bypass trimpots Bypass Level Adjust (RTA test points active).
  • Page 164 ® Dolby CP650 Installation Manual Setup and User Menus CP650 Setup Menu, A-Chain (Continued) menu menu Notes Typical Headroom Configuration Noise Floor Optimization Unity Gain Press OK to test. (Cat. No. 778 only) Dialogue Normalization Disabled/Enabled Disabled/Enabled Hold down middle button Local IP address: 192.168.99.200...
  • Page 165 The options shown in bold are the default settings when the unit was shipped from the factory. The shaded menu items do not apply to CP650DC models. menu menu Notes This is the top-level Format and CP650 Status Display menu display. Fader Setting Local/Auditorium Local/Auditorium Button: If a Cat.
  • Page 166 ® Dolby CP650 Installation Manual Setup and User Menus CP650 User Menu (Continued) menu menu Notes Select from Format list Select from Format list or Power-On Format Select or select Last Format select Last Format used. used. Contrast Adjustment Set the display contrast.

Table of Contents

Save PDF