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StudioComm 68A User Manual Download Page 1

50091-0105, Issue 2

© 2005 by Studio Technologies, Inc., all rights reserved

www.studio-tech.com

Model 68A Central Controller and

Model 69A Control Console

User Guide

Issue 2, January 2005

This User Guide is applicable for systems consisting of:

Model 68A: serial number M68A-00501 and later;

Model 69A: M69A-00742 and later

for Surround

Summary of Contents for 68A

Page 1: ...eserved www studio tech com Model 68A Central Controller and Model 69A Control Console User Guide Issue 2 January 2005 This User Guide is applicable for systems consisting of Model 68A serial number M...

Page 2: ...logies Inc Page 3 for Surround Table of Contents Foreword 5 Introduction 7 Installation 10 Configuration 14 Operation 30 Technical Notes 34 Specifications 38 Appendix A 39 MIDI Messages 40 Block Diagr...

Page 3: ...Issue 2 January 2005 Model 68A 69A User Guide Page 4 Studio Technologies Inc for Surround This page intentionally left blank...

Page 4: ...ld be improved The software now reflects the sage advice of these gentlemen Mike Mr Surround Sokol sug gested the exclusive solo mode as well as presenting a convincing case for adding down mix capabi...

Page 5: ...Issue 2 January 2005 Model 68A 69A User Guide Page 6 Studio Technologies Inc for Surround This page intentionally left blank...

Page 6: ...features while keeping it sim ple to operate Be certain that operators won t have to go through a long learning curve before they become efficient The end result achieves these goals providing the req...

Page 7: ...the mute relays on the Model 68A Central Control ler A pushbutton switch allows selection of either the 6 channel surround or the 2 channel stereo monitor output Control of the individual monitor outp...

Page 8: ...e control many operating parameters This allows operation to be tailored to meet the char acteristics of an installation In addition the specific operating preferences desired by a facility or individ...

Page 9: ...use different channel assignment schemes in their release formats It is hoped that care ful interconnection of audio signals during installation or incorporating routing flex ibility using a patch bay...

Page 10: ...ed for connection to balanced or unbalanced sources with nominal signal levels of 12 dBV to 6 dBu A 15 turn trim potentiometer is associated with each input allowing the input sensitivity to be adjust...

Page 11: ...ation is preferred unbalanced opera tion does not pose a problem To con nect to an unbalanced load connect the terminal as signal high and both the and shield as the signal low shield For optimal unba...

Page 12: ...led To From Control Console on the back panel of the Model 68A is used to connect to the Model 69A Should a cable of different length be re quired it should be wired in a one to one fashion for all 9...

Page 13: ...completion of the Model 69A s power up sequence Configuration After the physical installation has been completed several configuration issues must be addressed On the Model 68A the surround and stereo...

Page 14: ...rclockwise mini mum position 11 After ensuring that the Model 69A s level control is set to minimum return AC mains power to the power amps or amplified speakers Model 69A Operating Parameters Many St...

Page 15: ...right sur round and LFE channels will get routed to their respective monitor outputs Will the unused input channels pick up significant noise or hum Unlikely but why take a chance at having a problem...

Page 16: ...s selected only one channel can be selected for solo at a time The additive solo mode is the default setting Power up Mute All By default upon application of AC mains power the monitor outputs remain...

Page 17: ...level to be stored and then enabled by pressing the button labeled REF Setting the refer ence level is very simple 1 Set up a precision sound pressure level SPL measuring device at the desired listeni...

Page 18: ...nput This remote control input is reserved for future use Enabling or disabling this input will not impact system performance Dim Level The dim function is used to reduce the monitor output level by a...

Page 19: ...ility with the mono function found on many audio con soles As the factory default an attenua tion value of 3 dB was selected Auto Downmix The downmix function can be configured to automatically enable...

Page 20: ...ologies Inc Page 21 for Surround Model 69A Configuration Entering and Exiting Configuration Mode These LEDs will light alternately when configuration mode is active Press and hold the configuration bu...

Page 21: ...Default For Surround A and Surround B all six channels L C R LS RS LFE are active For Stereo A and Stereo B both channels L R are active Note A special input disable function is available By disablin...

Page 22: ...els C LS RS and LFE not active when stereo output enabled When the Mode button is pressed these LEDs display whether surround monitor output channels C LS RS and LFE are active when the stereo output...

Page 23: ...ute all function level control re sponse mode and level control auto mute all function When the Surround Stereo button is pressed these LEDs display the status of the power up mute all function When L...

Page 24: ...lay 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 Model 69A Configuration Reference...

Page 25: ...n is pressed these LEDs display the input associated with the remote input select function LED Surround A lit means Surround A LED Surround B lit means Surround B LED Stereo A lit means Stereo A LED S...

Page 26: ...D Surround B lit means 20 dB dim LED Stereo A lit means 15 dB dim LED Stereo B lit means 10 dB dim Use the buttons to select the dim level These LEDs display the configuration of remote mute all LED L...

Page 27: ...e mode of the mono function When LED L is lit the mono to left and right mode is selected When LED C is lit the mono to center mode is selected Use the buttons to change the configuration When the Mon...

Page 28: ...und output channels C LS RS and LFE not active when stereo output enabled Additive solo mode enabled Upon power up mute all function enabled Level control operates modified logarithmic Level control a...

Page 29: ...the input selection process It s a bit confusing to explain but simple once you experience it in real time A one sentence explana tion would describe the input recall feature as allowing the system to...

Page 30: ...the left and right channels and routes the result to both the left and right monitor output channels This method is the same as found on many stereo oriented audio consoles Useful for music mixing it...

Page 31: ...put is selected the left and right channels associated with the stereo output become active the left and right channels of the surround output mute In most cases surround output channels center left s...

Page 32: ...ly mute This feature is provided for those users accustomed to having a completely quiet output when the level control is set to its minimum position A Model 69A configuration parameter al lows the le...

Page 33: ...ted with remote input select will flash while the LEDs associated with any other active inputs will remain steadily lit Technical Notes Downmix The downmix function is implemented in the Model 68 Cent...

Page 34: ...istors each identical in value One 6 pin socket located on the printed circuit board is used to hold the resistors From the factory two 14 3 k ohm resis tors configure the filter for nominally 5 kHz O...

Page 35: ...es a detailed view of the sig nals that connect between the Model 68A Central Controller and the Model 69A Control Console The Model 68A provides is better because it refers to dB referenced to 0 775...

Page 36: ...ower Supply Common 68A to from 69A 2 15 Vdc 68A to 69A 3 Data MIDI System Exclusive 69A to 68A 4 Data Common 69A to from 68A 5 Remote Mute All 68A to 69A Note 2 6 Remote Dim 68A to 69A Note 2 7 Spare...

Page 37: ...ced 50 ohms Level Control Method laser trimmed voltage controlled amplifier integrated circuits manufac tured by THAT Corporation Attenuation Range 72 dB nominal using rotary level control Bandpass Fi...

Page 38: ...odel 68A is capable of doing By using standard MIDI messag es the Model 68A can be used for a wide range of special applications Any device that can be programmed to send system exclusive MIDI message...

Page 39: ...of Studio Tech ID 3 00H 2nd Byte of Studio Tech ID 4 56H 3rd Byte of Studio Tech ID 5 05H Product ID Model 68A 6 00H Function Restore Power Up Default Configuration 7 F7H EOX End of System Exclusive M...

Page 40: ...nput Source and Associated Channels 7 0nH Input Source range 1 4 1 Surround A 2 Surround B 3 Stereo A 4 Stereo B 8 nnH Input Channel Status Bit Map sum values from all six channels Channel 1 L off 00...

Page 41: ...00 on 01 Channel 2 Surround C off 00 on 02 Channel 3 Surround R off 00 on 04 Channel 4 Surround LS off 00 on 08 Channel 5 Surround RS off 00 on 10 Channel 6 Surround LFE off 00 on 20 8 nnH Surround M...

Page 42: ...ction Monitor Output Level Normal 7 nnH Monitor Output Level MSB range 00 7F 8 0nH Monitor Output Level LSB range 0 1 9 F7H EOX End of System Exclusive Message Notes Control console sends new value ea...

Page 43: ...4H Function Monitor Output Level Reverse 7 nnH Monitor Output Level MSB range 00 7F 8 0nH Monitor Output Level LSB range 0 1 9 F7H EOX End of System Exclusive Message Notes Not sent by control console...

Page 44: ...Tech ID 3 00H 2nd Byte of Studio Tech ID 4 56H 3rd Byte of Studio Tech ID 5 05H Product ID Model 68A 6 05H Function Mono 7 0nH Mono Status range 0 3 0 off 1 on L R sent to left and right channels of m...

Page 45: ...on Downmix Byte Value Description 1 F0H System Exclusive Message 2 00H 1st Byte of Studio Tech ID 3 00H 2nd Byte of Studio Tech ID 4 56H 3rd Byte of Studio Tech ID 5 05H Product ID Model 68A 6 06H Fun...

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