Dolby Laboratories DP567 User Manual
  1. Manuals
  2. Brands
  3. Dolby Laboratories Manuals
  4. Media Converter
  5. DolbyRemote DP567
  6. User manual
Dolby Laboratories DP567 User Manual

Dolby Laboratories DP567 User Manual

Digital two-channel audio encoder
Hide thumbs Also See for DP567:
Table of Contents

Advertisement

Quick Links

Download this manual
Model DP567
Dolby Digital
Two-Channel Audio Encoder
User's Manual
Issue 2
Part No. 91520

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DP567 and is the answer not in the manual?

Questions and answers

Related Manuals for Dolby Laboratories DP567

Summary of Contents for Dolby Laboratories DP567

  • Page 1 Model DP567 Dolby Digital Two-Channel Audio Encoder User’s Manual Issue 2 Part No. 91520...
  • Page 2 LIMITATION OF LIABILITY: It is understood and agreed that Dolby Laboratories' liability whether 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...

  • Page 3: Table Of Contents

    Model DP567 User’s Manual Table of Contents Chapter 1 Introduction ....................1-1 About This Manual....................1-1 About the Dolby Model DP567 ................1-2 Features.........................1-3 Dolby Digital (AC-3) ....................1-4 Chapter 2 Pre-Installation ..................2-1 Unpacking......................2-1 Inspection......................2-1 Fusing Information....................2-1 2.3.1 Main Fuse ....................2-1 2.3.2 Internal Fuse ....................2-2...
  • Page 4 Model DP567 User’s Manual Chapter 4 Operation ....................4-1 Front Panel......................4-1 Basic Operation.....................4-5 4.2.1 Local/Remote Mode.................4-5 4.2.2 Operational Modes ...................4-6 4.2.3 Autodetect Mode..................4-9 4.2.4 Bitstream Multiplex Mode..............4-10 4.2.5 Bypass Mode..................4-11 4.2.6 Preset Mode ...................4-12 Status Mode ......................4-15 4.3.1 Main Status ....................4-15 4.3.2...

  • Page 5: Regulatory Notices

    Model DP567 User’s Manual Regulatory Notices 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 6 Model DP567 User’s Manual IMPORTANT SAFETY NOTICE This unit complies with the safety standard IEC65. To ensure safe operation and to guard against potential shock hazard or risk of fire, the following must be observed: If the unit has a voltage selector, ensure that it is set to the correct mains voltage for your supply. If there is no voltage selector, ensure that your supply is in the correct range for the input requirement of the unit Ensure fuses fitted are the correct rating and type as marked on the unit.

  • Page 7: Chapter 1 Introduction

    Chapter 1 Introduction Thank you for purchasing the Dolby Model DP567 Dolby Digital (AC-3) Two-Channel Encoder. The DP567 combines ease and flexibility of operation with the high performance and quality for which all Dolby products are known. About This Manual This User’s Manual has been prepared specifically to help you get the most from the...

  • Page 8: About The Dolby Model Dp567

    Surround signals in the stereo coding mode. For a system block diagram on DP567 processing, please see Appendix A. The DP567 is suitable for use in any application where high quality one- or two- channel Dolby Digital encoding is required. The DP567 supports all one- and two- channel Dolby Digital audio coding modes at sample rates of 32, 44.1, and 48 kHz.

  • Page 9: Features

    The DP567 offers a number of connectors for input and output signals used to communicate status and other information. Other input connectors include an AES/EBU digital input that accepts either PCM or pre-encoded audio signals, including 5.1–channel signals, and a dedicated AES/EBU reference signal input,...

  • Page 10: Dolby Digital (Ac-3)

    Model DP567 User’s Manual Introduction Dolby Digital (AC-3) Dolby Digital (AC-3) is a perceptual audio coding algorithm that takes advantage of auditory masking and both intra- and inter-channel redundancy to enable the efficient storage and transmission of high-quality digital audio.

  • Page 11: Chapter 2 Pre-Installation

    1 Amp, 250 V, 20 mm, time-lag fuse (for all operating voltages) Check Main Fuse WARNING : The power to the DP567 must be off when the following steps are performed. Ensure that the main power cable to the unit is not connected to a power source.

  • Page 12: Internal Fuse

    Model DP567 User’s Manual Pre-Installation 1. With a small flat-blade screwdriver, open the fuse compartment door in the AC power input housing as shown in Figure 2-1. METAL CLIP INSTALLED ON UNUSED SIDE OF CARRIER OPEN THE DOOR INSTALL ACTIVE...

  • Page 13: Configuring Jumper Settings

    To gain access to these jumpers, remove the top cover of the unit as follows: WARNING : The power to the DP567 must be off when the following steps are performed. Ensure that the main power cable to the unit is not connected to a power source.

  • Page 14: Digital In / Ref In / Vitc Input Termination

    To maintain signal integrity, cable termination is recommended. The DP567 provides two internal jumpers for Remote signal termination. Jumper J24 corresponds to the data input and jumper J25 corresponds to the data output of the remote connector.

  • Page 15: Analog Audio Input Termination J2/J3 [10K Ohms]

    To connect audio ground directly to chassis ground in the DP567, move jumper J1 to position (move jumper towards the front of the unit).

  • Page 16: Chapter 3 Installation And Level Calibration

    Installation and Level Calibration Mounting The DP567 occupies a 1–U (1 ¾" x 19”) rack mount and can be positioned in any orientation. Ensure adequate ventilation, and do not mount the unit directly above any heat-generating equipment. The unit operates within specifications up to a maximum ambient temperature of 45º...

  • Page 17: Main Digital Output (Main Out)

    3.2.5 Bypass Digital Input (Bypass In) If the DP567 is operating as the primary encoder in a “hot” standby configuration, connect the Bypass In input to the Main Out connector of the secondary (standby) encoder. In case of a system fault, power failure, or activation of the Bypass Mode parameter, the Bypass In connector will be internally connected to the Switched Out connector.
  • Page 18 Model DP567 User’s Manual Installation Figure 3 -1. Rear panel.

  • Page 19: Reference / Time Code / Delay Connections

    The conversion from a balanced to an unbalanced circuit should be made only at the source end of the cable (not at the DP567) by connecting the low side wire to ground. Note that both audio pins of the XLRs (pins 2 and 3) must always be connected.

  • Page 20: Ttl Delay Input (Ttl Delay)

    10-bit asynchronous serial data format (1 start bit, 1 stop bit, 8 data bits, no parity) at a data rate specified by the user. Under RS-232, the Model DP567 is categorized as a DCE (Data Communications Equipment) device, and is typically connected to data terminal equipment (DTE).

  • Page 21: Gp I/O Control Inputs (Gp I/O In)

    If required, connect input signals to the 9-pin D connector GP I/O In for the direct control of eight specific DP567 functions by an external device. If no connection is made, input signal levels default to a high level (5 volts).

  • Page 22: Gp I/O Status Outputs (Gp I/O Out)

    GP I/O Status Outputs (GP I/O Out) If required, connect the 9-pin D connector GP I/O Out to remotely monitor the status of eight specific DP567 functions. The following status indications are available (detailed information is provided in Appendix B.14):...
  • Page 23 NOTE : The combination of the Pass-through and Encoding outputs indicates the DP567 output status. A low level on either means that the DP567 is producing a valid encoded output signal. A high level means the DP567 is not producing a valid encoded output. (Output status does not apply to the switched output when the Bypass mode is active.)

  • Page 24: Power

    Depending upon which button you press while the DP567 powers up, the unit can enter other power on states—that is, the condition or mode of the DP567 after power is applied. The power on states include restoring factory defaults and entering the Download mode.

  • Page 25: Level Calibration Of Analog Inputs

    Installation Level Calibration of Analog Inputs Analog input gains in the DP567 are adjustable by means of the gain controls on the rear panel (see Figure 3-2). Each gain control is associated with a pair of LEDs that glow with equal brightness in the presence of a reference tone 20 dB below digital full-scale.

  • Page 26: Chapter 4 Operation

    The LCD screen displays one of the available Status or Setup menu options. The Status menu provides status information on the current DP567 operating state, and the Setup menu allows you to modify various encoding parameters. For Status menu screens, please see Section 4.3, Status Mode.
  • Page 27 Model DP567 User’s Manual Operation Figure 4 - 1. Front panel.
  • Page 28 Model DP567 User’s Manual Operation Navigation buttons ( continued ) When [SHIFT] is enabled, the "Shift" LED will illuminate (Figure 4-2). To disable it, press [SHIFT] again or activate another function. Figure 4 - 2. When Shift is enabled the LED illuminates.
  • Page 29 Model DP567 User’s Manual Operation (4) Status LEDs The dedicated front-panel status LEDs are operational in both the Local and Remote modes. Further details for specific LEDs can be found in relevant DP567 operation sections. Description REMOTE Green: Remote mode is enabled.

  • Page 30: Basic Operation

    The DP567 normally operates in the Local mode which means that operation of the DP567 is confined to the front-panel controls of the unit. You can also operate the DP567 from a remote location by connecting the front- or rear-panel port and enabling the Remote mode.

  • Page 31: Operational Modes

    The main digital output is the primary DP567 output source. The output signal at the Main Out port will always be an AES/EBU signal with valid encoded audio signals in a format consistent with ATSC specifications (as indicated by the Output Format in Setup), or the output audio data will be zero-valued in the case of an invalid operating condition.
  • Page 32 [SETUP]. To return to the Main Status screen, press [SHIFT] + [SETUP]. Pass-through Mode The Pass-through mode allows the DP567 to process pre-encoded inputs to the main digital output either as a single bitstream or as part of a multiplexed bitstream. A valid clock source must be present when this mode is enabled.
  • Page 33 Enabling the Test Tone mode does not guarantee that a valid test tone will be produced at the output of the DP567. Dolby Digital encoding must also be active, which requires that the selected clock source be valid. See Section 5.2.7, Operating Mode Control, for detailed information on the Test Tone mode.

  • Page 34: Autodetect Mode

    PCM audio data or pass- through pre-encoded data directly to the output of the DP567. While in this mode, the DP567 continually monitors the bitstream input so that only valid encoded frames are passed through.

  • Page 35: Bitstream Multiplex Mode

    • Any bitstreams detected in the Reference Input must have been encoded in the “Pro 16-bit” mode, and cannot be present in the same channel selected by Output Mode. If the above restrictions are not followed, the DP567 will indicate an error and encoded signals will not be present at the output.

  • Page 36: To Enable Bypass Mode

    Switched Out output. (For the menu structure of Bypass Mode in Setup, please see Section 5.2.2, Input/Output Control). Bypass Mode can be enabled from the DP567 front-panel user interface or via the remote interface. In addition, a dedicated rear-panel GP I/O connection can be used to directly activate the bypass function, overriding the internal settings of the Bypass Mode parameter.

  • Page 37: Preset Mode

    Immediately after a preset is saved or when a preset is recalled, the Preset mode is considered active and the DP567 will reflect the status of the active preset number: • The front-panel LCD will show the name of the preset.

  • Page 38: Save Preset

    Model DP567 User’s Manual Operation To create and save a preset: Press the [SETUP] button to enter the Main Setup menu. Find the Encoder Control menu using the arrow buttons to scroll through the Main Setup menu. Press [ENTER] to select Encoder Control.
  • Page 39 Find Recall Preset using the arrow buttons to scroll through the Encoder Control menu. Press [ENTER] to select Recall Preset. The current default is shown on the LCD. Use the arrow buttons to select the desired preset number you wish the DP567 to recall. A selection is indicated by a flashing cursor.

  • Page 40: Status Mode

    Operation Status Mode The Status mode is active whenever the DP567 is operating in Local mode. This mode enables the display of specific status information on the front-panel LCD screen (more general status information is displayed through the dedicated status LEDs). The Status screen can show one of the following states: Main Status, Input Status, Reference, Time Code Type, Time Code Start and Stop Times, Clock Source, and Coding Delay.

  • Page 41: Encoder Status

    Model DP567 User’s Manual Operation The following table lists available bitstream audio coding modes (channel mode display A/B in the figure above) for the DP567: Audio Coding Mode Encoded Channels L, R L, R Line 1 of the LCD can show one of the following: <Preset Name>...

  • Page 42: Digital Input

    Model DP567 User’s Manual Operation 4.3.2 Digital Input After you press the [↓] ↓] ↓] ↓] button or the [→ → → → ] button in the Status menu, you will see the Digital Input status screen. The Digital Input status screen displays the current state of the input source.

  • Page 43: Reference Input

    Model DP567 User’s Manual Operation 4.3.3 Reference Input Status information on the Reference Input is provided by both the “Ref In” LED and the Status screen. Reference Input Locked at 48 kHz The Reference Input can function as an input source for the bitstream multiplex function and as a clock source.

  • Page 44: Time Code Input

    Time Code), depending on the setting of the Time Code Input parameter. For more information on time code parameters in Setup, please see Section 5.2.2, Input/Output Control, and Section 5.2.3, Encoder Control. If time code is enabled, Line 1 of the DP567 front-panel LCD can display: Time Code VITC VITC input enabled.

  • Page 45: Time Code Control

    4.3.6 Clock Source The Clock Source status screen displays the current reference source for the Dolby Digital encoding process, as well as the clock reference for the DP567 output signal. Clk Src = Dig In Locked at 48 kHz Line 1 of the LCD can display one of the following: Clk Src = Dig In Selected clock source is the digital input.

  • Page 46: Coding Delay

    Coding Delay represents the time between receipt of the first sample of a particular frame by the DP567 and the appearance of the first word of the coded output frame in the DP567 output bitstream. The source of Coding Delay is also indicated as internal or external, as configured in the Setup menu.

  • Page 47: Chapter 5 Advanced Operation

    Model DP567 User’s Manual Chapter 5 Advanced Operation This section describes specific DP567 setup operations. Advanced operation includes the configuration of parameters and presets in the Setup menu and the adjustment of LCD contrast. LCD Contrast Adjust You can adjust the LCD contrast by using the front-panel Contrast function within Local mode only.
  • Page 48 Model DP567 User’s Manual Advanced Operation Informational parameters, such as Copyright Bit and Original Bitstream, allow you to modify the corresponding parameters in the Dolby Digital bitstream. These parameters are not dependent upon other settings. They can be set to any option in all operational modes.

  • Page 49: Audio Service

    Press the [SETUP] button to enter the Main Setup menu. Scroll through the menu if necessary to find Audio Service, then press [ENTER]. Use the arrow buttons to scroll through the Audio Service menu. If you press [ESC] or [SETUP], the DP567 will return to the Main Setup menu.

  • Page 50: Channel Mode

    A/B, with A indicating the number of front channels, and B indicating the number of rear (surround) channels. The following table lists available modes in the DP567 and defines which input channels are used for encoding based on the selected mode.
  • Page 51 Model DP567 User’s Manual Advanced Operation To define the Channel Mode: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the Audio Service menu.
  • Page 52 Model DP567 User’s Manual Advanced Operation Data Rate Data Rate is a control parameter that determines the bit rate of the encoded Dolby Digital bitstream. All Data Rate options are allowed (56 to 640 kb/s). However, selection of the Data Rate is dependent on settings of the Channel Mode, Sample Rate, and Auxiliary Data parameters.

  • Page 53: Error Messages

    Model DP567 User’s Manual Advanced Operation Error Messages If a new Data Rate is selected but not supported for the current Channel Mode setting, the following error message will be displayed briefly (see Appendix D, Supported Data Rates and Audio Bandwidths). The Data Rate parameter will then return to its previous setting:...
  • Page 54 Model DP567 User’s Manual Advanced Operation To select the Bitstream Mode: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the Audio Service menu.

  • Page 55: Dialogue Level

    Dolby Digital signal is below digital 100%. Available options on the DP567 range from -1 dB to -31 dB. The default setting for this parameter is –27 dB. Internal Dolby Digital encoding is not affected by this parameter.

  • Page 56: Input/Output Control

    Control menu (see the diagram above for menu selection). If you press [ESC], the DP567 will return to the Main Setup menu and display the I/O Control menu option. If you press [SETUP], the DP567 will return to the top of the Main Setup menu, displaying the Audio Service menu option.

  • Page 57: Input Source

    Model DP567 User’s Manual Advanced Operation Input Source Input Source is a control parameter that allows you to select between analog and digital audio input sources. Only one input source can be active at a time. When Digital is chosen as the input source, the Status menu and the “Digital In” LED on the front panel indicate the current state of the digital-input source.
  • Page 58 Model DP567 User’s Manual Advanced Operation To select the Input Source: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the I/O Control menu.
  • Page 59 Clock Source is a control parameter that specifies the reference clock source for the Dolby Digital encoding process as well as the clock reference for the DP567 output signal. The DP567 will not perform encoding or produce a Dolby Digital output unless the clock source is valid.
  • Page 60 Model DP567 User’s Manual Advanced Operation To select the Clock Source: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the I/O Control menu.

  • Page 61: Output Format

    Model DP567 User’s Manual Advanced Operation Output Format Output Format parameters allow you to determine the mode of the AES/EBU output bitstream (professional or consumer) and to specify how the encoded data is packed within the bitstream. Formatting of the output bitstream is consistent with ATSC specifications.

  • Page 62: Output Mode

    If Multiplex Mode is currently enabled and the selected Output Mode conflicts with the data format received on the Reference Input, the DP567 will indicate an error via the front panel Error LED and encoded signals will not be present at the output. (See Section 4.2.4, Bitstream Multiplex Mode, for specific restrictions on Multiplex Mode operation.)

  • Page 63: Error Message

    Not Valid: Check Multiplex Mode Time Stamp Time Stamp determines whether the DP567-encoded Dolby Digital bitstream contains associated time code packets in the output bitstream as defined by ATSC specifications. The default setting for Time Stamp is Disabled. I / O Control...

  • Page 64: Input Format

    Model DP567 User’s Manual Advanced Operation Input Format Input Format is a control parameter that allows you to choose the format of the data received from the Input Source (Analog or Digital). Available Input Format selections include the following: • PCM: Dolby Digital encoding will be enabled.
  • Page 65 Model DP567 User’s Manual Advanced Operation Error Messages If Pre-encoded or Autodetect is selected and the current Input Source is Analog, the following error message will be displayed briefly. The Input Format parameter will then return to its previous setting:...

  • Page 66: Multiplex Mode

    Model DP567 User’s Manual Advanced Operation Multiplex Mode Multiplex Mode is a control parameter that allows multiple-encoded bitstreams to be combined into a single digital output bitstream. It can be used when a valid input bitstream is being received at the reference input and passed through to the main digital output. Certain improper operating conditions, such as the lack of a valid pre-encoded signal on the reference input, can disable encoding and produce zero-valued output data.
  • Page 67 Model DP567 User’s Manual Advanced Operation Error Messages If Enabled is selected and the current Clock Source is not Ref In – SRC Off, the following error message will be displayed briefly. The Multiplex Mode parameter will then return to...
  • Page 68 Model DP567 User’s Manual Advanced Operation To adjust the Coding Delay: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the I/O Control menu.
  • Page 69 Model DP567 User’s Manual Advanced Operation Auxiliary Data Input Mode Auxiliary Data Input mode is a control parameter that allows you to indicate whether the auxiliary data field is present in the encoded Dolby Digital bitstream. When present, serial data will be received from the Aux Data Input port and added to the auxiliary data field of the output Dolby Digital bitstream.
  • Page 70 Model DP567 User’s Manual Advanced Operation To select Auxiliary Data Input Mode: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the I/O Control menu.
  • Page 71 Model DP567 User’s Manual Advanced Operation Time Code Input Source Time Code Input Source is an informational parameter that allows you to select one of two time code inputs for receiving time code signals: LTC or VITC. The front-panel “Time Code”...
  • Page 72 The Bypass Mode parameter is typically used to route the output of a secondary (standby) DP567 to the switched audio output of the primary DP567. To enable this function, the Bypass In connector of the primary encoder must be linked to the Main Out connector of the secondary (standby) encoder.
  • Page 73 Advanced Operation Bypass Mode (continued) Bypass Mode can be enabled from the DP567 front panel user interface or via the remote interface. In addition, a dedicated rear-panel GP I/O connection can be used to directly activate the bypass function, overriding the internal settings of the Bypass Mode parameter. (See Section 4.2.5, Bypass Mode, for additional Bypass Mode information.)

  • Page 74: Encoder Control

    If you press [ESC], the DP567 will return to the Main Setup menu and display the Encoder Control menu option. If you press [SETUP], the DP567 will return to the top of the Main Setup menu, displaying the Audio Service menu option.

  • Page 75: Recall Preset

    Model DP567 User’s Manual Advanced Operation Recall Preset The preset modes of the DP567, as described in Section 4.2.6, Preset Mode, define a complete set of operational functions that can be quickly recalled without having to change each individual parameter.
  • Page 76 HH:MM:SS:FF:ssss represents the current setting for time code start time (see Time Code Start Time). Time Code-based Recall is enabled, and the DP567 automatically returns to the Main Status default menu. NOTE : Recall of Presets 1 through 8 affects the state of the front-panel LEDs for these presets.
  • Page 77 Next, the following message appears on the screen: Abort Preset #NN? ENTER=Yes ESC=No If you wish to abort this setting, press [ENTER]. The DP567 confirms your selection with the following message, then returns to the Recall Preset menu: Preset #NN Aborted! If you do not want to change this setting, press [ESC] and the Recall Preset menu appears.
  • Page 78 Model DP567 User’s Manual Advanced Operation Save Preset Main Setup ENTER Encoder Control Encoder Control Recall Preset Encoder Control ENTER ENTER Save Preset Save Preset MENU NAVIGATOR Encoder State ENTER Enter # NN Name TC Start Time <name_n > ENTER...
  • Page 79 Model DP567 User’s Manual Advanced Operation Save Preset (continued) After specifying the preset name, press [ENTER] and you will see the following screen: Save Settings? ENTER=Yes ESC=No If you select [ENTER] (Yes), the LCD screen will show the following: Preset #NN...
  • Page 80 Model DP567 User’s Manual Advanced Operation Encoder State Encoder State defines the requested state of the Dolby Digital encoding process. Setting Encoder State to Stop manually disables the encoding process. Setting this parameter to Encode enables encoding to take place. Setting it to Time Code Ctrl enables and disables the encoding process automatically based on time code start and stop values.
  • Page 81 Time Code Start and Stop Time When the Encoder State parameter is set to Time Code Ctrl, the DP567 is placed in a state in which the internal encoding process begins and ends at specific times. TC Start Time enables the DP567 to wait until a specified start time occurs before encoding frames (based on the selected time code input signal).
  • Page 82 Model DP567 User’s Manual Advanced Operation Time Code Start Time When you enable Time Code Ctrl in Encoder State, use the Time Code Start Time parameter to adjust the specific time for the encoding process to begin. Main Setup ENTER...
  • Page 83 Model DP567 User’s Manual Advanced Operation Time Code Stop Time When you enable Time Code Ctrl in Encoder State, use the Time Code Stop Time parameter to adjust the specific time for the encoding process to end. Main Setup ENTER...

  • Page 84: Dynamic Range Processing

    If you press [ESC], the DP567 will return to the Main Setup menu and display the Dynamic Range menu option. If you press [SETUP], the DP567 will return to the top of the Main Setup menu, displaying the Audio Service menu option.
  • Page 85 Model DP567 User’s Manual Advanced Operation Dynamic Range Presets (continued) Any mode can be selected at any time. The compression modes apply only to the encoded signal and are not applicable when the Pass-through mode is active. However, the compression mode may still be set even when the Pass-through mode is active.

  • Page 86: Preprocessing Options

    If you press [ESC], the DP567 will return to the Main Setup menu and display the Preprocessing menu option. If you press [SETUP], the DP567 will return to the top of the Main Setup menu, displaying the Audio Service menu option.

  • Page 87: Low Pass Filter

    Model DP567 User’s Manual Advanced Operation Lowpass Filter Lowpass Filter allows you to control whether or not a bandwidth limiting low-pass filter is applied to the main input channels before the Dolby Digital encoding process is performed. The default setting for Lowpass Filter is Enabled.
  • Page 88 (Pass-through mode is active). NOTE : The DP567 does not support digital input signals with CCITT J.17 pre-emphasis. When a digital PCM input is being received in the professional format and the emphasis bit indicates the input has CCITT J.17 pre-emphasis applied, the DP567 will indicate that the input is invalid and encoding will be...

  • Page 89: Bitstream Information

    Parameters menu (see the diagram above for menu selection). If you press [ESC], the DP567 will return to the Main Setup menu and display the BSI Parameters menu option. If you press [SETUP], the DP567 will return to the top of the Main Setup menu, displaying the Audio Service menu option.
  • Page 90 Model DP567 User’s Manual Advanced Operation Dolby Surround Mode Dolby Surround Mode is an informational parameter that allows you to indicate when an encoded two-channel Dolby Digital bitstream is conveying a Dolby Surround encoded program. This mode does not affect internal Dolby Digital encoding and is only active in the 2/0 coding mode.
  • Page 91 Model DP567 User’s Manual Advanced Operation Original Bitstream Original Bitstream is an informational parameter that allows you to indicate whether the encoded Dolby Digital bitstream is an original or a copy. The default setting for Original Bitstream is Yes. To indicate an Original Bitstream: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the BSI Parameters menu.
  • Page 92 Model DP567 User’s Manual Advanced Operation To indicate Audio Production Information: NOTE : If you are not in Setup mode, (1) press [SETUP] , (2) scroll through the Main Setup menu and (3) press [ENTER] when you find the BSI Parameters menu.

  • Page 93: Operating Mode Control

    If you press [ESC], the DP567 will return to the Main Setup menu and display the Operating Mode menu option. If you press [SETUP], the DP567 will return to the top of the Main Setup menu, displaying the Audio Service menu option.

  • Page 94: Remote Baud Rate

    Advanced Operation Remote Baud Rate When in Remote mode, the DP567 responds to commands from one of the two remote interface ports: the rear-panel RS-422 port or the front-panel RS-232 port. As mentioned earlier, commands received from the front-panel port are equivalent to any commands received at the rear-panel port.

  • Page 95: Unit Address

    Other messages are ignored. NOTE : The Unit Address parameter must be set via the DP567 user interface. Addresses that may conflict with other devices controlled on the same remote interface are not checked.
  • Page 96 Enabling the Test Tone mode does not guarantee that a valid test tone will be produced at the output of the DP567. Dolby Digital encoding must also be active, which requires that the selected clock source be valid.
  • Page 97 Service and BSI Parameters (Data Rate, Bitstream Mode, etc.). • If Autodetect or Pass-through mode is selected, the Test Tone mode ignores any input signals and codes the test tones according to the internal DP567 settings (not the settings of a pre-encoded input).

  • Page 98: Firmware Upgrade

    Firmware Upgrade When enabled, the Firmware Upgrade option in the Operating Mode menu allows new system firmware to be downloaded to the DP567 through either the front- or rear-panel remote ports at a rate defined by the Remote Baud Rate parameter.

  • Page 99: Appendix A System Block Diagram

    ( 3 2 / 4 4 . 1 / 4 8 k H z ) Clock Ref AES3 Switched Out Coding User Interface Delay Front Panel Pulse AES/EBU AES3 Input Transmitter Main Out = data = clock Figure A - 1. DP567 System Block Diagram.

  • Page 100: Appendix B Connector Pinouts

    Model DP567 User’s Manual Appendix B Connector Pinouts Analog Audio Input (Analog In) XLR female connectors Ch A Input Connection Analog signal ground Analog audio + Analog audio - Ch B Input Connection Analog signal ground Analog audio + Analog audio -...
  • Page 101 Model DP567 User’s Manual Connector Pinouts Bypass Digital Audio Input (Bypass In) BNC female connector per AES-3ID-1995 Delay Control Input (TTL Delay) BNC female connector, 5V TTL level active high pulse Linear Time Code Input XLR female connector Connection Signal ground...

  • Page 102: General Purpose Control Input Port (Gp I/O In)

    Model DP567 User’s Manual Connector Pinouts B.12 Front Panel Remote Control Serial Port (Remote) Mini DIN-8 female connector, electrical specifications per EIA RS-232 Connection Comments Asynchronous data out Ground Asynchronous data in Sense Ground to select front-panel remote port B.13 General Purpose Control Input Port (GP I/O In)

  • Page 103: Appendix C Factory Default Presets

    Model DP567 User’s Manual Appendix C Factory Default Presets PRESET NUMBER Preset Name Stereo Music Stereo Film Surround Film Mono Speech 2/0 Stereo 2/0 Stereo 2/0 Stereo 1/0 Mono Channel Mode 256 kb/s 192 kb/s 192 kb/s 128 kb/s Data Rate...

  • Page 104: Appendix D Supported Data Rates And Audio Bandwidths

    Model DP567 User’s Manual Appendix D Supported Data Rates and Audio Bandwidths NOTE : This information is included for reference only and is subject to change. Audio Bandwidths Sample Rate: 48 kHz Data Rate 1/0 Channel Mode 1+1 Channel Mode...
  • Page 105 Model DP567 User’s Manual Supported Data Rates and Audio Bandwidths Sample Rate: 32 kHz Data Rate 1/0 Channel Mode 1+1 Channel Mode 2/0 Channel Mode 56 kb/s 10.6 kHz not supported not supported 11.3 kHz not supported not supported 64 kb/s 80 kb/s 15.8 kHz...

  • Page 106: Appendix E Software Downloading Procedure

    • Personal computer with an RS-232 port capable of communication at 38400 bps. • A 9-pin D-Sub to 8-pin mini-DIN cable assembly to connect the computer and DP567. • Upgrade software from Dolby Laboratories when a new release is made available.

Table of Contents