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Orban OPTIMOD-FM 8200 Operating Manual

Digital audio processor
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OPTIMOD-FM
8200
Digital Audio Processor
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Summary of Contents for Orban OPTIMOD-FM 8200

  • Page 1 Operating Manual OPTIMOD-FM 8200 Digital Audio Processor ®...
  • Page 2 IMPORTANT NOTE: Refer to the unit’s rear panel for your Model #. Model Number: Description: 8200/U3S OPTIMOD-FM 8200 DIGITAL with three DSP cards, Stereo Encoder, Protection Structure, Two-band Purist Structure, Two-band Normal Structure, Multi-band Processing Structure, set to 115V (for 90-130V µ...

  • Page 3: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS All the safety and operating instructions should be read before the appliance is operated. Retain Instructions: The safety and operation instructions should be retained for future reference. Heed Warnings: All warnings on the appliance and in the operating instructions should be adhered to. Follow Instructions: All operation and user instructions should be followed.
  • Page 4 Safety Instructions (German) Gerät nur an der am Leistungsschild vermerkten Spannung und Stromart betreiben. Sicherungen nur durch solche, gleicher Stromstärke und gleichen Abschaltverhaltens ersetzen. Sicherungen nie überbrücken. Jedwede Beschädigung des Netzkabels vermeiden. Netzkabel nicht knicken oder quetschen. Beim Abziehen des Netzkabels den Stecker und nicht das Kabel enfassen.
  • Page 5 (2) Check the other sections of the Manual (consult the Table of Contents and Index) to see if there might be some suggestions regarding your problem. (3) After reading the section on Factory Assistance, you may call Orban Customer Service for advice during normal California business hours. The number is (1) 510/351-3500.
  • Page 6 ® MAINTAINING 8200 SECURITY Important: Ensure 8200 security by making it standard policy for each 8200 user to manually re-enable lockout when finished with normal operation. If your 8200 uses security pascodes and TIMEOUT TO AUTO LOCK is OFF (as set in the screen), the last successful pascode entry defines the current security level.
  • Page 7 For 8200s equipped with the 8200 D/SRC, the 8200's controls now include a switch that allows you to defeat Orban's special implementation of AES/EBU status bits which are used to control Orban 8208 and 8218 Stereo Encoders. This special implementation may be defeated to accommodate certain digital STLs that misinterpret these status bits.
  • Page 8 RS-232 and the Orban supplied 8200PC software for Microsoft Windows, or through binary commands. The Orban 8200PC software offers full access to all 8200 features, while the binary communications method can only recall presets. When set to On (default), this control allows remote control of the 8200 through RS-232 communications, only with the Orban supplied 8200PC software for Microsoft Windows.
  • Page 9 8200PC and binary communications method is not possible. The binary communications method is intended to be used primarily by programmers for third-party software development. Orban Customer Service will supply a developer's white paper upon request. We cannot, however, provide any technical support for third-party software.
  • Page 10 MANUAL ADDENDUM Orban PRESET NAME SOURCE PRESET NORMAL LESS-MORE ____ GENERAL-MEDIUM ADLT CONTEMP-MED GENERAL-OPEN ADLT CONTMP-OPEN URBAN/RAP-DENSE URBAN/RAP-DENSE URBAN/RAP-MEDIUM URBAN/RAP-MEDIUM ROCK-DENSE ROCK-DENSE ROCK-MEDIUM ROCK-MEDIUM ROCK-OPEN ROCK-OPEN ADLT CONTEMP-MED ADLT CONTEMP-MED ADLT CONTMP-OPEN ADLT CONTMP-OPEN COUNTRY-MEDIUM ADLT CONTEMP-MED COUNTRY-OPEN ADLT CONTMP-OPEN...
  • Page 11 OPTIMOD-FM 8200 V3.00 UPGRADE MANUAL ADDENDUM ROCK: The ROCK presets are designed for a bright high end and punchy low end (although not as exaggerated as the URBAN/RAP presets). There is enough presence energy to ensure that vocals stand out. A modest amount of HIGH FREQUENCY...
  • Page 12 MANUAL ADDENDUM Orban New Multi-Band Features For Version 3.00 High Frequency Coupling Control (Band 3&4 Coupling) High Frequency Coupling couples a certain percentage of the Band 3 gain control signal into Bands 4 and 5. This forces Bands 4 and 5 to follow the gain reduction in Band 3 to a user-adjustable extent.
  • Page 13 Bass Clip Threshold Control (Bass Clip Thrsh dB) The 8200 uses Orban's patented multi-band distortion-cancelling clipper system to achieve a low peak-to-average ratio without creating audible distortion due to clipping. The bass clipper is part of this system. It is embedded in the multi-band crossover so that harmonics created by clipping are rolled off by part of the crossover filters.
  • Page 14 MANUAL ADDENDUM Orban approximately 25% of the total phase rotation that occurs when the three-pole phase rotator is active. When you bypass the phase rotator, many voices sound audibly harsher because more clipping occurs. This can be particularly problematical if you are processing heavily for loudness.
  • Page 15 OPTIMOD-FM 8200 V3.00 UPGRADE MANUAL ADDENDUM...
  • Page 16 I-10 MANUAL ADDENDUM Orban Final Clip Drive Control Version 3.00 extends the range of the control by 3dB at the lower FINAL CLIP DRIVE end of its range. This means that you can turn down the clipping by 3dB by comparison to earlier versions of 8200 software.

  • Page 17: Software History

    For 8200s equipped with the 8200 D/SRC, the 8200's controls now include a switch that allows you to defeat Orban's special implementation of AES/EBU status bits which are used to control Orban 8208 and 8218 Stereo Encoders. This special implementation may be defeated to accommodate certain digital STLs that misinterpret these status bits.
  • Page 18 I-12 MANUAL ADDENDUM Orban • A-O 100% LVL dB resolution has been increased for more accurate level adjustment. • Cleaner Audio When Switching Between Analog and Digital Source Material. • Pressing DISABLE EBS now eliminates the EBS TEST button from the screen.
  • Page 19 I-13 OPTIMOD-FM 8200 V3.00 UPGRADE MANUAL ADDENDUM • Security PASCODE authorized for SYSTEM SETUP. • Protection Structure pre-emphasis filters are now phase-linear. • Adds Protection Limiter control: 30 Hz HPF switch to set the 30Hz high-pass filter prior to the limiter in or out of the signal path.
  • Page 20 I-14 MANUAL ADDENDUM Orban This Page Intentionally Left Blank!
  • Page 21 Operating Manual OPTIMOD-FM 8200 Digital Audio Processor ®...
  • Page 22 This will prevent any buildup of damaging static. The OPTIMOD-FM 8200 Digital Audio Processor is protected by U.S. patents 4,249,042; 4,208,548; 4,460,871; and U.K. patent 2,001,495. Other patents pending.
  • Page 23 Orban OPTIMOD-FM 8200 Operating Manual page contents Section 1: Introduction OPTIMOD-FM 8200 DIGITAL Audio Processor ESCape and HELP Presets in the 8200 Input/Output Configurations Location of OPTIMOD-FM About Transmission Levels and Metering Line-Up Facilities Internal Clock Future Updates Warranty, Feedback...
  • Page 24 Orban OPTIMOD-FM 8200 Operating Manual page contents Section 4: Maintenance Routine Maintenance Getting Inside the Chassis In-System Testing (“Proof of Performance”) Field Audit of Performance Field Alignment Section 5: Troubleshooting Problems and Possible Causes Troubleshooting IC Opamps Technical Support Factory Service...
  • Page 25 Index cable 2-14, 2-16 cable shielding 2-16 - 2-17 modify screen 2-62 calibration 3-64 EBS MODIFY screen 3-67 4000 2-37 chassis EBS tones 464A 2-27, 2-31 getting inside 4-3 failure 5-5 8100A1 1-16 ground 2-19 escape button 2-25, 3-3 8100AST 1-16 circuit boards exciter interface 2-21 8100AXT2 1-16...
  • Page 26 I/O CALIB CONTROL MAIN TO SUB switch 2-25, 3-3 packing for shipment 5-9 flow chart 3-67 maintenance, routine 4-2 packing list 2-3 I/O CALIB I/O metering parts flow chart 3-67 composite 6-19 list 6-27 IDLE G/R LOCKOUT meters ordering 6-28 buttons 3-42, 3-76 PPM 2-50 pascode...
  • Page 27 SAVE CHANGES technical support 5-8 button 3-57 telephone/post lines 6-2 screen 3-57 temperature 2-13 schematics 6-45 TEST switch 2-25, 3-3 screen displays 3-41 time set 2-65 screen saver 2-67 tone generator screens internal 1-20 AUTOMATION 3-59 - 3-60 troubleshooting 5-1 IDLE G/R LOCKOUT 3-41, 3-75 - 3-76 IC opamps 5-8 IDLE I/O LOCKOUT 3-41, 3-75 - 3-76...
  • Page 28 This Page Intentionally Left Blank.

  • Page 29: Table Of Contents

    1 - 1 OPTIMOD-FM 8200 INTRODUCTION pagecontents Section 1 Introduction page contents OPTIMOD-FM 8200 DIGITAL Audio Processor ESCape and HELP Presets in the 8200 Input/Output Configurations Location of OPTIMOD-FM 1-11 About Transmission Levels and Metering 1-17 1-17 Figure 1-1: Absolute Peak Level, VU and PPM Reading...
  • Page 30 1 - 2 OPTIMOD-FM 8200 INTRODUCTION...

  • Page 31: Optimod-Fm 8200 Digital Audio Processor

    1 - 3 OPTIMOD-FM 8200 INTRODUCTION OPTIMOD-FM 8200 DIGITAL Audio Processor Orban’s OPTIMOD-FM 8200 DIGITAL Audio Processor is a complete audio processing system for FM broadcast. User-Friendly Interface • A large liquid-crystal display (LCD) makes setup, adjustment and programming of the 8200 easy. The screen clearly shows all metering functions of the process- ing structure in use.
  • Page 32 • The 8200 Audio Processor is designed to work perfectly with Orban’s studio level control units (which are commonly used to protect transmission links in installations where the audio is passed from studio to transmitter in left/right form, using telephone/post lines, dual-microwave STLs, or similar).
  • Page 33 • The 8200 applies to digital processing a distillation of Orban’s sixteen years of market-leading analog processing experience; the unit builds and improves on the uniquely successful sound of the Orban analog processors.

  • Page 34: Escape And Help

    1 - 6 OPTIMOD-FM 8200 INTRODUCTION ESCape and HELP The front-panel ESCape and HELP buttons are always there to aid you in your travels around the 8200’s functions. Use ESCape to get back to the previous screen. Pressing ESC repeatedly will get you back...

  • Page 35: Input/Output Configurations

    User Preset. Either way, the Factory Preset remains for you to return to if you wish. Input/Output Configurations The OPTIMOD-FM 8200 DIGITAL is designed to simultaneously accommodate: • analog left/right inputs and outputs •...
  • Page 36 1 - 8 OPTIMOD-FM 8200 INTRODUCTION Digital AES/EBU Left/Right Input/Output The digital input and output follow the professional AES/EBU standard. The left/right digital input is on one XLR-type female connector on the rear panel; the left/right digital output is on one XLR-type male connector on the rear panel.
  • Page 37 1 - 9 OPTIMOD-FM 8200 INTRODUCTION The correct peak level of the stereo program applied to the stereo encoder sometimes depends on the number of subcarriers in use. Some regulatory authorities require that total baseband modulation be maintained within specified limits. Thus the level of the stereo main and subchannel must be reduced when a subcarrier is turned on.
  • Page 38 Computer Interface Your Orban dealer can provide a program for any IBM-compatible PC (running Microsoft Windows 3.1 or higher) that permits you to adjust any 8200 preset by remote control, or to do most anything else that you can do from the 8200’s front panel controls. The program displays all of the 8200’s “soft meters”...

  • Page 39: Location Of Optimod-Fm

    1 - 11 OPTIMOD-FM 8200 INTRODUCTION Location of OPTIMOD-FM Optimal Control of Peak Modulation Levels The audio processing circuitry in OPTIMOD-FM produces a signal that is pre-emphasized µ µ to either the 50 s or 75 s standard curve, is precisely and absolutely high frequency-con- trolled and peak-controlled to prevent over-modulation, and is filtered at 15kHz to protect the 19kHz pilot and prevent distortion caused by aliasing-related non-linear crosstalk.
  • Page 40 1 - 12 OPTIMOD-FM 8200 INTRODUCTION Best Location for OPTIMOD-FM The best location for OPTIMOD-FM is as close as possible to the transmitter, so that its stereo encoder output can be connected to the transmitter through a circuit path that introduces the least possible change in the shape of OPTIMOD-FM’s carefully peak-limited...
  • Page 41 If you require a long cable run, you can use Orban’s CIT25 Composite Isolation Transformer to break any ground loops. This transformer will ordinarily cure even the most stubborn hum or noise caused by the composite connection between OPTIMOD-FM and the exciter.
  • Page 42 Many commercial STLs (and FM exciters as well) have this problem. Some consultants presently offer modifications to minimize or eliminate this problem. If your exciter or STL has this problem, you may contact Orban Customer Service for the latest information on such services.
  • Page 43 The microwave transmitters at the studio are protected from overload by one of Orban’s Studio Level Control Systems, such as the Co-Operator 464A. These units also perform the gain riding function ordinarily executed by the AGC section of the 8200’s processing, and optimizes the signal-to-noise...
  • Page 44 This is covered in the setup information in Section 2 (page 2-46 or 2-56). If you are using an Orban 4000 Transmission Limiter to protect your STL, do not defeat the gain-riding function in the main 8200 processing. The Orban 4000 is a transmission system overload protection device;...

  • Page 45: About Transmission Levels And Metering

    1 - 17 OPTIMOD-FM 8200 INTRODUCTION About Transmission Levels and Metering Meters Studio engineers and transmission engineers consider audio levels and their measurements differently, so they typically use different methods of metering to monitor these levels. The VU meter is an average-responding meter (measuring the approximate RMS level) with a 300ms rise time and decay time;...
  • Page 46 1 - 18 OPTIMOD-FM 8200 INTRODUCTION Studio Line-up Levels and Headroom The studio engineer is primarily concerned with calibrating the equipment to provide the required input level for proper operation of each device, and so that all devices operate with the same input and output levels.

  • Page 47: Line-Up Facilities

    Composite Output Level The Orban 8200 Audio Processor controls instantaneous, absolute peak levels to a tolerance of approximately ± 0.1dB. Composite modulation is indicated in % modulation, absolute instantaneous peak indicating. 100% is calibrated to the highest composite peak modulation level that the processing will produce, including the pilot tone, under any program, process- ing, or setup condition (except when the processing is switched to bypass).
  • Page 48 1 - 20 OPTIMOD-FM 8200 INTRODUCTION Built-in Calibrated Line-up Tones To facilitate matching the output level of the 8200 to the transmission system that it is driving, the 8200 contains an adjustable USER TONE that produces sine waves at 8200’s left, right and composite outputs.

  • Page 49: Internal Clock

    For more information, see page 2-74. Future Updates From time to time, Orban will introduce new features to the control system or the processing. As these features are introduced, you will be given the opportunity to purchase the new features. Some may only require software updating; some may require additional hardware.

  • Page 50: Warranty, Feedback

    1 - 22 OPTIMOD-FM 8200 INTRODUCTION Warranty, Feedback Warranty The warranty, which can be enjoyed only by the first end-user of record, is located on the inside back cover of this manual. Save it for future reference. Details on obtaining factory service are provided on page 5-9.

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