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StudioComm 77 User Manual

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for Surround
Model 760-02 Central Controller and
Model 77 Control Console
User Guide
Issue 3, October 2016
This User Guide is applicable for systems consisting of:
Model 760-02: serial number M760-02-00151 and later with
software version 4.20 and higher and FPGA version 4.15 and higher;
Model 77: serial number M77-00151 and later with software version 4.20 and higher
© 2016 by Studio Technologies, Inc., all rights reserved
www.studio-tech.com
50246-1016, Issue 3

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  • Page 1 Model 760-02: serial number M760-02-00151 and later with software version 4.20 and higher and FPGA version 4.15 and higher; Model 77: serial number M77-00151 and later with software version 4.20 and higher © 2016 by Studio Technologies, Inc., all rights reserved www.studio-tech.com...
  • Page 2 This page intentionally left blank.

  • Page 3: Table Of Contents

    Revision History............4 Introduction..............5 Installation ..............8 Configuration ..............15 Operation..............36 Technical Notes ............43 Specifications ...............46 Appendix A—Connection Pin-Out Charts ....48 Appendix B—Sync Input Sources ........49 Appendix C—Downmix Formulas.........50 Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 3...

  • Page 4: Revision History

    Revised text for error codes Err1, Err2, and Err3; added text for error code Err4. Issue 2, April 2015: • Revised specifications to reflect final audio performance measurements. • Text clarifications. Issue 1, January 2015: • Initial release. Issue 3, October 2016 Model 760-02/77 User Guide Page 4 Studio Technologies, Inc.

  • Page 5: Introduction

    Introduction status information. A 4-digit numeric dis- play indicates the monitor output level in real time. A major strength of the Model 77 What This User Guide Covers is its ability to configure, under software This User Guide is designed to assist you...
  • Page 6 Digital surround (5.1) inputs A & B Models 77 & monitor outputs input input C and digital stereo inputs A & B 71 Control Consoles Remote control inputs Issue 3, October 2016 Model 760-02/77 User Guide Page 6 Studio Technologies, Inc.
  • Page 7 Model light the fact that this output channel may 760-02 with a maximum of four Model 77 or include more than just LFE content. The Model 71 Control Consoles. A second 9-pin bass management function, if enabled, “D-sub”...

  • Page 8: Installation

    A location will be selected applications or users. for the first Model 77 Control Console and it will be connected to the Model 760-02. Issue 3, October 2016 Model 760-02/77 User Guide Page 8 Studio Technologies, Inc.
  • Page 9 AC mains power will be connected to the Model 760-02. For advanced applications Two surround (5.1) and three stereo digital up to three additional Model 77 or Model audio sources can be connected. All sourc- 71 Control Console units can be connect- es can be monitored using the surround ed to the Model 760-02.
  • Page 10 – and Figure 4. Connections for Surround A, shield together. Surround B, Stereo A, and Stereo B Digital Inputs Issue 3, October 2016 Model 760-02/77 User Guide Page 10 Studio Technologies, Inc.
  • Page 11 A better method is to con- panel. For flexibility this input can be con- nect a dedicated timing reference signal to figured to be high-impedance (“floating”) or Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 11...
  • Page 12 (“latch”) in response end is used to interconnect the Model to a logic pulse. 760-02 with the Model 77 units. A cable is A 9-pin D-subminiature connector is used for the remote control inputs. Refer to...
  • Page 13 After this requirement has been met (two conductors including the shield) for the up to three additional Model 77 or Model 71 DC power circuit. Control Consoles can also be connected to A few simple calculations are required to and powered by the Model 760-02.
  • Page 14 The two LEDs on the right side are discussed. Note the required current of the front panel will individually light in a for a Model 77 is 100 mA while a Model rapid right-to-left test sequence. Then the 71 requires only 35 mA. It’s important to LEDs will flash in cadence while the firm-...

  • Page 15: Configuration

    • Bass Management Model 760-02’s front panel will remain • Mute/Solo Bass Management Mode flashing in cadence. On the Model 77 units a diagnostic code may be displayed. Refer • Sync Source to the Technical Notes section of this user •...
  • Page 16 Model 71. All other configuration pa- rameters are stored in the Model 760-02. As a user aid, a Model 77 that has entered the configuration mode will have its mute Model 77 Device Address and solo LEDs (associated with the chan-...
  • Page 17 Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 17...
  • Page 18 When the sync input is not terminated the input impedance is 3. Use the Model 77 Control Console to very high, essentially applying no load to the select the input source that contains source.
  • Page 19 Overall Display Mode 6. Once the configuration mode has been entered, all the monitor outputs will The Model 77’s 4-digit numeric display can mute. Press and hold the reference be configured to display the monitor out- level button; its associated LED will put level in either an attenuation mode or begin to flash.
  • Page 20 0 to 170 milliseconds. Auto Reference Level Off In this case selecting a delay of 120 on the Model 77 will result in an actual time delay When auto reference level off is enabled, of 60 milliseconds.
  • Page 21 3 dB. numerous users of Studio Technologies’ (These levels can also be notated as –3 dB StudioComm for Surround products. But and –6 dB.) there are application-specific situations By default, when the surround to stereo...
  • Page 22 Model 760-02 and other connected Model 71 It’s also possible to use the StudioComm’s and Model 77 units will continue. When a output level offset capability to adjust the Model 71 enters its configuration mode...
  • Page 23 Model 71. Figure 8. Model 71 Control Console Front and Back Panels Address Dim LED Reference Level LED Figure 9. Model 71 Device Address Chart Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 23...
  • Page 24  Press and hold the configuration button for 2 seconds to enter or exit the configuration mode. These LEDs will light alternately when configuration mode is active. Issue 3, October 2016 Model 760-02/77 User Guide Page 24 Studio Technologies, Inc.
  • Page 25 Stereo input C sample rate converter enabled. Stereo monitor output can be enabled. Note: The Model 77’s device address is the only parameter stored in the Model 77. All other parameters are stored in the Model 760-02. Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc.
  • Page 26 Bass management high-pass filter slope 24 dB-per-octave. Bass management crossover frequency 80 Hz. Mute/solo pre-bass management mode. Note: Bass management capability only available at sample rates of 44.1, 48, 88.2, and 96 kHz. Issue 3, October 2016 Model 760-02/77 User Guide Page 26 Studio Technologies, Inc.
  • Page 27 32, 44.1, 48, 88.2, 96, 176.4, and 192 kHz. Default: Sync source is L/R of currently selected input. Sync input terminated. Audio-synced-to-video sample rate 48 kHz. Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 27...
  • Page 28 The 5-second button-press delay is a safety feature ensuring that the reference level will not be accidently changed. To permanently store the new value, you must still exit the configuration mode. Issue 3, October 2016 Model 760-02/77 User Guide Page 28 Studio Technologies, Inc.
  • Page 29 SPL. the reference level in dB SPL, and auto reference level off. Default: Attenuation display mode selected. 85.0 dB SPL reference level. Auto ref level off disabled. Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 29...
  • Page 30 Press and hold the Dim button to display and select the dim level, remote mute all, and remote dim. Default: –20 dB dim level. Remote mute all enabled. Remote dim enabled. Issue 3, October 2016 Model 760-02/77 User Guide Page 30 Studio Technologies, Inc.
  • Page 31 LS and RS channel level change –3 dB when surround to stereo downmix function active. C channel level change –6 dB when surround to stereo downmix function active. LFE level change full attenuation when surround to stereo downmix function active. Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc.
  • Page 32 –12.0, at which point the display will show – – – –. Default: 6.0 dB channel pop solo up offset level. –6.0 dB channel pop solo down offset level. Issue 3, October 2016 Model 760-02/77 User Guide Page 32 Studio Technologies, Inc.
  • Page 33 48 kHz sampling rate. The value is scaled up or down for other sample rates. Default: Input delay 0 ms for both A and B. Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 33...
  • Page 34 Use the level control to adjust the monitor output level offsets. The range is –12.0 to 12.0 in 0.5-dB steps. Default: 0.0 dB surround monitor output level offsets. 0.0 dB stereo monitor output level offsets. Issue 3, October 2016 Model 760-02/77 User Guide Page 34 Studio Technologies, Inc.
  • Page 35 –20 dB dim level. Warning: Each Model 77 unit must have a unique address. Restoring factory defaults will reset only this specific Model 77 to device address A1. If another connected unit is already configured for address A1, normal system operation will stop.

  • Page 36: Operation

    LED will light to indicate that the input communicating with the one or more con- has been selected. Typically, only one nected Model 77 or Model 71 units. If the source will be selected for monitoring at control console status LED is flashing it any one time.
  • Page 37 A or B is selected. When a surround source has been selected for monitoring, the surround to stereo down- The Model 77 associates the state of the mix function will automatically enable when- downmix functions with the currently se- ever the stereo to mono downmix function lected input.
  • Page 38 Note that the system’s default reference level is –60.0 dB so “out Surround and Stereo Outputs of the box” the Model 77 will display –60.0 The surround/stereo function allows se- when reference level mode is enabled. lection between two different loudspeaker How the rotary level control functions systems.
  • Page 39 fixed amount. The Model Rotary Level Control 77’s configuration mode allows the dim level The rotary level control is used to manu- to be selected from among four choices: ally adjust the level of the selected moni- –10.0, –15.0, –20.0, or –25.0 dB.
  • Page 40 During normal operation of the mute/solo buttons. The buttons function in a StudioComm system the active input delay, press-to-enable/press-to-disable “latching” A or B, can be selected. The channel mute/ mode. Multiple channels can be muted or solo button, stereo to mono button, and 4- soloed at the same time.
  • Page 41 Figure 10. Solo mode and input delay settings Display and Display Mode Display in dB SPL If the Model 77 is configured to display the The Model 77’s 4-digit LED display shows monitor output level in dB SPL, the 4-digit...
  • Page 42 POP will appear in the 4-digit display Model 71 units. And, as expected, changes whenever a channel is actively being soloed made using a Model 77 will be reflected in in the channel pop solo mode. This ensures the Model 71’s LEDs.

  • Page 43: Technical Notes

    The operat- the Model 760-02’s sync status LED will ing characteristics are identical to those of light steadily. On the Model 77 units the the Model 77 Control Console, discussed word sync will momentarily be displayed earlier in this section.
  • Page 44 Model 77. For example, commence. Err4 will display if a Model 77 has been connected with a Model 780-Series central Error Codes controller. Should a problem be encountered during...
  • Page 45 No clicks, pops, or other noises will occur vice, while at a 48 kHz sampling rate, may when the Model 77 or Model 71 units are not be synchronized (“genlocked”) to the again connected. The control consoles “house”...

  • Page 46: Specifications

    10-40 kHz, ±0.4 dB @ 96 kHz sample rate Dynamic Range: 119 dB, A-weighted Distortion (THD+N): < 0.001%, 20-22 kHz, level control at full, 22 kHz bandwidth Issue 3, October 2016 Model 760-02/77 User Guide Page 46 Studio Technologies, Inc.
  • Page 47 Surround Model 77 Control Console Model 71 Control Console Application: up to four Model 77 Control Consoles Application: up to three Model 71 Control Con- can be connected to a Model 760-02 Central Con- soles can be connected to a Model 760-02 Central...

  • Page 48: Appendix A-Connection Pin-Out Charts

    D-subminiature (DE-9F). Connector uses 4-40 threaded inserts for locking with mating plug. Connections between Model 760-02 and Connections for Remote Control Inputs Model 77 and Model 71 Issue 3, October 2016 Model 760-02/77 User Guide Page 48 Studio Technologies, Inc.

  • Page 49: Appendix B-Sync Input Sources

    720p/23.98 Hz 1080p/24 Hz 720p/24 Hz 1080p/25 Hz 720p/25 Hz 1080p/29.97 Hz 720p/29.97 Hz 1080p/30 Hz 720p/30 Hz 1080psf/24 Hz 720p/50 Hz 1080psf/23.98 Hz 720p/59.94 Hz 720p/60 Hz Model 760-02/77 User Guide Issue 3, October 2016 Studio Technologies, Inc. Page 49...

  • Page 50: Appendix C-Downmix Formulas

    C = (0.707 or 0.5)L + (0.707 or 0.5)R + (0.707 or 0.5)C + (0.5 or 0.35)LS + (0.5 or 0.35)RS + (0 or 0.5)LFE Issue 3, October 2016 Model 760-02/77 User Guide Page 50 Studio Technologies, Inc.

This manual is also suitable for:

71760-02

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