Orban OPTIMOD-FM 8500 Effect Processor
Manufacturer:
Model:
OPTIMOD-FM 8500
Date:
2011
Category:
Group:
Description:
Digital Audio Processor

Information

The OPTIMOD-FM 8500 Digital Audio Processor Orban’s all-digital 8500 OPTIMOD-FM Audio Processor can help you achieve the highest audio quality in FM stereo broadcasting. Because all processing is performed by high-speed mathematical calculations within Motorola DSP56367 24-bit digital signal processing chips, the processing has cleanliness, quality, and stability over time and temperature that is unmatched by analog processors. OPTIMOD-FM 8500 is descended from the industry-standard OPTIMOD-FM audio processors. Thousands of these processors are on the air all over the world. They have proven that the “OPTIMOD sound” attracts and keeps an audience even in the most competitive commercial environment. Because OPTIMOD-FM incorporates several audio processing innovations exclusive to Orban products, you should not assume that it can be operated in the same way as less sophisticated processors. If you do, you may get disappointing results. Take a little time now to familiarize yourself with OPTIMOD-FM. A small investment of your time now will yield large dividends in audio quality. The rest of Section 1 explains how OPTIMOD-FM fits into the FM broadcast facility. Section 2 explains how to install it. Section 3 tells how to operate OPTIMOD-FM. Section 4 through Section 6 provides reference information. OPTIMOD-FM was designed to deliver a high quality sound while simultaneously increasing the average modulation of the channel substantially beyond that achievable by “recording studio”-style compressors and limiters. Because such processing can exaggerate flaws in the source material, it is very important that the source audio be as clean as possible. For best results, feed OPTIMOD-FM unprocessed audio. No other audio processing is necessary or desirable. If you wish to place level protection prior to your studio / Transmitter link (STL), use the Orban OPTIMOD 6300 or Optimod-PC 1101. These processors can be adjusted so that they substitute for the AGC circuitry in OPTIMOD-FM, which is then defeated. OPTIMOD-FM 8500 is available in two front-panel configurations—the 8500 has a full-featured front panel, while the 8500X has a blank front panel and must be con- trolled by Orban’s PC Remote application running on Microsoft Windows XP, 2000 (SP3), or later. Both units have identical sound and features except for the difference in their front panels. Both units run the same software. If you are setting up an “X” version, refer to Administering the 8500 through its Serial Ports or Ethernet (starting on page 2-43) for instructions on how to use the 8500X’s serial port #2 to set up communications between your computer and the 8500X. Both the 8500 and 8500X simultaneously process for analog FM and digital channels like the iBiquityTM HD RadioTM system, Eureka 147 (DAB), DRM, or netcasts. The 8500’s HD output provides look-ahead peak limiting that is optimized to make the most of limited bit-rate codecs used in many digital radio systems. By eschewing any clipping, the HD output prevents the codec from wasting precious bits encoding clipping distortion products, allowing the codec to use its entire bit budget to encode the desired program material. Thanks to a base sample rate of 64 kHz throughout the 8500’s processing, the HD output can be set for audio bandwidths between 15 and 20 kHz. Many codecs operate better when fed 15 kHz audio because this enables them to use their available bit bandwidth most efficiently by concentrating on the part of the audio spectrum that is critical to perceived audio quality. This is particularly true for low rates, like 32 kbps. However, at higher sample rates, full 20 kHz bandwidth provides the same bandwidth as typical source material, so you may prefer to use it for rates of 96 kbps and above.

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Service and User Manual
Manual type:
Service and User Manual
Pages:
350
Size:
6.40 Mbytes (6708623 Bytes)
Language:
english
Revision:
Manual ID:
96123.300.00
Date:
01 May 2011
Quality:
Electronic document, no scan, very well readable.
Upload date:
31 October 2017
MD5:
c2d37b76912f7aadcdda159580ec36fd
Downloads:
327

Information

Version 3.0 Software/Hardware Index ... 0-10 Section 1 Introduction ... 1-1 ABOUT THIS MANUAL ... 1-1 THE OPTIMOD-FM 8500 DIGITAL AUDIO PROCESSOR ... 1-1 User-Friendly Interface ... 1-2 Absolute Control of Peak Modulation ... 1-3 Flexible Configuration ... 1-3 Adaptability through Multiple Audio Processing Structures ... 1-5 Controllable ... 1-5 Upgradeable ... 1-6 PRESETS IN OPTIMOD-FM ... 1-7 Factory Presets ... 1-7 User Presets ... 1-7 I NPUT/ OUTPUT CONFIGURATION ... 1-7 Digital AES3 Left/right Input/outputs ... 1-8 Analog Left/right Input/output ... 1-8 Stereo Analog Baseband Composite Output ... 1-9 Subcarriers ... 1-9 Remote Control Interface ... 1-10 Computer Interface ... 1-10 RS-232 Serial Port (Serial 1) ... 1-11 RS-232 Serial Port (Serial 2) ... 1-11 100 Mbps Ethernet Port ... 1-11 LOCATION OF OPTIMOD-FM ... 1-11 Optimal Control of Peak Modulation Levels ... 1-11 Best Location for OPTIMOD-FM ... 1-12 If the Transmitter is not accessible: ... 1-12 If the Transmitter is accessible: ... 1-13 STUDIO-TRANSMITTER LINK ... 1-14 Transmission from Studio to Transmitter ... 1-14 Digital Links ... 1-15 Composite Baseband Microwave STLs (Analog and Digital) ... 1-16 Dual Microwave STLs ... 1-16 Analog Landline (PTT / Post Office Line) ... 1-17 Using the Orban 8100AST (or 8100A/ST) External AGC with the 8500 ... 1-18 STL and Exciter Overshoot ... 1-18 USING LOSSY DATA REDUCTION IN THE STUDIO ... 1-18 ABOUT TRANSMISSION LEVELS AND METERING ... 1-19 Meters ... 1-19 Figure 1-1: Absolute Peak Level, VU and PPM Reading ... 1-19 Studio Line-up Levels and Headroom ... 1-20 Transmission Levels ... 1-20 LINE-UP FACILITIES ... 1-21 Metering of Levels ... 1-21 Left/right Output Level ... 1-21 Composite Output Level ... 1-21 Built-in Calibrated Line-up Tones ... 1-2 Built-in Calibrated Bypass Test Mode ... 1-22 MONITORING ON LOUDSPEAKERS AND HEADPHONES ... 1-22 Low-Delay Monitoring ... 1-24 EAS TEST ... 1-24 PC CONTROL AND SECURITY P ASSCODE ... 1-25 WARRANTY , USER FEEDBACK ... 1-26 User Feedback ... 1-26 LIMITED WARRANTY ... 1-26 INTERNATIONAL WARRANTY ... 1-26 EXTENDED WARRANTY ... 1-27 Section 2 Installation ... 2-1 INSTALLING THE 8500 ... 2-1 Figure 2-1: AC Line Cord Wire Standard) ... 2-2 Figure 2-2: Wiring the 25-pin Remote Interface Connector ... 2-4 8500 REAR PANEL ... 2-5 AUDIO INPUT AND OUTPUT CONNECTIONS ... 2-6 Cable ... 2-6 Connectors ... 2-6 Analog Audio Input ... 2-7 Analog Audio Output ... 2-7 AES3 DIGITAL INPUT AND OUTPUT ... 2-8 COMPOSITE OUTPUT AND SUBCARRIER INPUTS ... 2-9 Figure 2-3: Separation vs. load capacitance ... 2-9 GROUNDING ... 2-11 Power Ground ... 2-11 Circuit Ground ... 2-12 8500 FRONT PANEL ... 2-12 EXTERNAL AGC INSTALLATION (OPTIONAL) ... 2-14 If you are using an Orban 8200ST external AGC: ... 2-14 Figure 2-4: 8200ST Jumper Settings (*Factory Configuration) ... 2-15 QUICK SETUP ... 2-17 ANALOG AND DIGITAL I/O SETUP ... 2-24 USING CLOCK-BASED AUTOMATION ... 2-36 SECURITY AND PASSCODE PROGRAMMING ... 2-37 To Unlock the Front Panel ... 2-40 8500 User Interface Behavior during Lockout ... 2-40 Default ADMIN Passcode ... 2-40 Security and Orban’s PC Remote Application ... 2-41 Passcodes and Software Updates ... ... 2-41 ADMINISTERING THE 8500 THROUGH ITS SERIAL PORTS OR ETHERNET ... 2-43 Connecting via Serial Port #2 Using a Terminal Program on a PC ... 2-43 Connecting to the 8500’s Ethernet Port or Serial Port #1 via a Terminal Program on a PC ... 2-45 Direct Control Using PuTTY ... 2-45 Automated Control Using PuTTY/Plink ... 2-47 Automated Control Using Netcat ... 2-47 Administrative Operations ... 2-48 REMOTE CONTROL INTERFACE PROGRAMMING ... 2-5 NETWORKING AND REMOTE CONTROL ... 2-57 I NSTALLING 8500 PC REMOTE CONTROL SOFTWARE ... 2-60 Installing the Necessary Windows Services ... 2-60 Check Hardware Requirements ... 2-60 Running the Orban Installer Program ... 2-61 Setting Up Ethernet, LAN, and VPN Connections ... 2-62 Conclusion ... 2-62 SYNCHRONIZING OPTIMOD TO A NETWORK TIME SERVER ... 2-63 Table 2-1: NIST-referenced timeservers ... 2-63 Updating your 8500’s Software ... 2-66 APPENDIX: SETTING UP SERIAL COMMUNICATIONS ... 2-69 Preparing for Communication through Null Modem Cable ... 2-69 Connecting Using Windows 2000 Direct Serial Connection: ... 2-69 Connecting Using Windows XP Direct Serial Connection ... 2-75 Preparing for Communication through Modems ... 2-79 Connecting Using Windows 2000 Modem Connection ... 2-80 Connecting using Windows XP Modem Connection ... 2-85 Section 3 Operation ... 3-1 8500 FRONT PANEL ... 3-1 I NTRODUCTION TO PROCESSING ... 3-3 Some Audio Processing Concepts ... 3-3 Distortion in Processing ... 3-4 Loudness and Distortion ... 3-4 OPTIMOD-FM—from Bach to Rock ... 3-4 Fundamental Requirements: High-Quality Source Material and Accurate Monitoring ... 3-5 ABOUT THE 8500’S SIGNAL PROCESSING FEATURES ... 3-6 Dual-Mono Architecture ... 3-6 Signal Flow ... 3-6 ITU-R 412 Compliance ... 3-10 Two-Band Purist Processing ... 3-11 Digital Radio Processing ... 3-11 Input/Output Delay ... 3-12 CUSTOMIZING THE 8500’S SOUND ... 3-13 Basic Modify ... 3-13 Intermediate Modify ... 3-14 Advanced Modify ... 3-14 Gain Reduction Metering ... 3-15 To Create or Save a User Preset ... 3-15 To Delete a User Preset ... 3-16 ABOUT THE PROCESSING STRUCTURES ... 3-17 F ACTORY PROGRAMMING PRESETS ... 3-18 Table 3-1: Factory Programming Presets ... 3-19 Equalizer CONTROLS ... 3-25 Table 3-2: Equalization Controls ... 3-26 STEREO ENHANCER CONTROLS ... 3-30 Table 3-3: Stereo Enhancer Controls ... 3-30 AGC CONTROLS ... 3-31 Table 3-4: AGC Controls ... 3-31 Advanced AGC Controls ... 3-34 CLIPPER CONTROLS ... 3 Table 3-5: Clipper Controls ... 3-37 Figure 3-1: 0-100 kHz Baseband Spectrum (Loud-Hot preset) ... 3-40 Figure 3-2: 19 kHz Pilot Notch Filter Spectrum (Loud-Hot preset; detail) ... 3-40 Advanced Clipper Controls ... 3-41 THE TWO-BAND STRUCTURE ... 3-43 The Protection Presets ... 3-44 Setting Up the Two-Band Structure for Classical Music ... 3-44 Customizing the Settings ... 3-45 The Two-Band Structure’s Full Setup Controls ... 3-45 Table 3-6: Two-Band Controls ... 3-46 Advanced Two-Band Controls ... 3-48 THE FIVE-BAND STRUCTURE ... 3-50 Putting the Five-Band Structure on the Air ... 3-50 Customizing the Settings ... 3-50 The Five-Band Structure’s Full Setup Controls ... 3-51 Table 3-7: Multiband Controls ... 3-51 Table 3-8: MB Attack / Release Controls ... 3-53 Table 3-9: MB Band Mix Controls ... 3-57 Advanced Multiband and Band Mix Controls ... 3-58 To Override the Speech/Music Detector ... 3-62 ABOUT THE 8500’ S HD / DIGITAL RADIO PROCESSING ... 3-63 Delay Difference between HD and FM Outputs ... 3-65 HD I/O Setup Controls ... 3-65 Input/Output > HD Digital Radio screen: ... 3-65 Table 3-10: HD I/O Setup Controls ... 3-66 Digital Output ... 3-68 Unique HD Audio Controls ... 3-69 Table 3-11: Unique HD Audio Controls (found in HD Limiting page) ... 3-70 ITU-R MULTIPLEX POWER CONTROLLER ... 3-71 Figure 3-3: Multiplex power over 15 minute observation interval with Multiplex power Controller active, measured at the Optimod’s composite output ... 3-72 Audio Processing and the Multiplex Power Threshold Control ... 3-73 About the Multiplex Power Controller’s Time Constants ... 3-73 TEST MODES ... 3-74 Table 3-12: Test Modes ... 3-74 GETTING THE Bass SOUND YOU WANT ... 3-75 USING THE 8500 PC REMOTE CONTROL SOFTWARE ... 3-77 To set up a new connection: ... 3-78 To initiate communication: ... 3-79 To modify a control setting: ... 3-79 To recall a preset: ... 3-80 To save a user preset you have created: ... 3-80 To back up User Presets, system files, and automation files onto your computer’s hard drive: ... 3-80 Note to Users Familiar with Older Version of PC Remote ... 3-81 To restore archived presets, system files, and automation files: ... 3-81 To share an archived User Preset between 8500s: ... 3-83 To modify INPUT/OUTPUT and SYSTEM SETUP: ... 3-83 To modify AUTOMATION: ... 3-83 To group multiple 8500s: ... 3-83 Operation Using the Keyboard ... 3-84 To Quit the Program ... 3 About Aliases created by Optimod 8500 PC Remote Software ... 3-84 Multiple Installations of Optimod 8500 PC Remote ... 3-85 Section 4 Maintenance ... 4-1 ROUTINE MAINTENANCE ... 4-1 SUBASSEMBLY REMOVAL AND REPLACEMENT ... 4-2 FIELD AUDIT OF PERFORMANCE ... 4-7 Table 4-1: Decoder Chart for Power Supervisor ... 4-10 Table 4-2: Layout Diagram of J7, with expected voltages on each pin ... 4-10 Table 4-3: Typical Power Supply Voltages and AC Ripple ... 4-10 Section 5 Troubleshooting ... 5-1 PROBLEMS AND POTENTIAL SOLUTIONS ... 5-1 RFI, Hum, Clicks, or Buzzes ... 5-1 Unexpectedly Quiet On-Air Levels ... 5-1 Poor Peak Modulation Control / Low On-Air Loudness ... 5-1 Audible Distortion On-Air ... 5-2 Audible Noise on Air ... 5-3 Whistle on Air, Perhaps Only in Stereo Reception ... 5-4 Interference from stereo into SCA ... 5-4 Figure 5-1: Typical 8500 baseband spectrum with heavy processing, 0-100 kHz. ... 5-4 Shrill, Harsh Sound ... 5-5 Dull Sound ... 5-5 System Will Not Pass Line-Up Tones at 100% Modulation ... 5-5 System Will Not Pass Emergency Alert System (“EAS” USA Standard) Tones at the Legally Required Modulation Level ... 5-6 System Receiving 8500’s Digital Output Will Not Lock ... 5-6 19 kHz Frequency Out-of-Tolerance ... 5-6 L–R (Stereo Difference Channel) Will Not Null With Monophonic Input ... 5-6 Talent Complains About Delay in Their Headphones ... 5-6 HD Output Sounds Too Bright ... 5-6 Harsh Sibilance (“Ess” Sounds) in the HD Channel ... 5-6 HD and FM Levels Do Not Match When the Receiver Crossfades ... 5-6 Loudness Drops Momentarily During HD Radio Analog/Digital Crossfades ... 5-7 HD Frequency Response is Limited to 15 kHz ... 5-7 You Cannot Set Any Output to Emit an HD Signal ... 5-7 General Dissatisfaction with Subjective Sound Quality ... 5-7 Security Passcode Lost (When Unit is Locked Out) ... 5-8 Connection Issues between the 8500 and a PC, Modem, or Network ... 5-8 Troubleshooting Connections ... 5-8 You Cannot Access the Internet After Making a Direct or Modem Connection to the 8500: ... 5-9 OS-SPECIFIC TROUBLESHOOTING ADVICE ... 5-10 Troubleshooting Windows 2000 Direct Connect: ... 5-10 Troubleshooting Windows 2000 Modem Connect: ... 5-11 Troubleshooting Windows XP Direct Connect: ... 5-12 Troubleshooting Windows XP Modem Connect: ... 5-1 TECHNICAL SUPPORT ... 5-14 FACTORY SERVICE ... 5-15 SHIPPING INSTRUCTIONS ... 5-15 Section 6 Technical Data ... 6-1 SPECIFICATIONS ... 6-1 Performance ... 6-1 Installation ... 6-2 CIRCUIT DESCRIPTION ... 6-6 Overview ... 6-6 Control Circuits ... 6-7 User Control Interface and LCD Display Circuits ... 6-7 Input Circuits ... 6-8 Output Circuits ... 6-10 DSP Circuit ... 6-12 Power Supply ... 6-13 ABBREVIATIONS ... 6-13 P ARTS LIST ... 6-15 Obtaining Spare Parts ... 6-15 Base Board ... 6-16 CPU Module ... 6-17 RS-232 Board ... 6-19 Power Supply ... 6-20 Input/Output (I/O) Board ... 6-21 DSP Board (Pre-V3) ... 6-25 DSP Board (V3) ... 6-27 Interface Board ... 6-29 Headphone Board ... 6-30 Encoder Board ... 6-31 LCD Carrier Board ... 6-31 SCHEMATICS AND P ARTS LOCATOR DRAWINGS ... 6-33

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