Orban OPTIMOD 8400 Effect Processor
Hersteller:
Modell:
OPTIMOD 8400
Datum:
2002
Kategorie:
Gruppe:
Beschreibung:
Digital Audio Processor

Information

8400 OPTIMOD-FM Digital Audio Processor Orban’s all-digital 8400 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 DSP56362 Digital Signal Processing chips, the processing has cleanliness, quality, and stability over time and temperature that is unmatched by analog processors. OPTIMOD-FM 8400 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 8200ST OPTIMOD-Studio Compressor/Limiter/HF Limiter/Clipper. The 8200ST can be adjusted so that it substitutes for the broadband AGC circuitry in OPTIMOD-FM, which is then defeated. OPTIMOD-FM 8400 is available in two main configurations—the 8400 has a full-featured front panel, while the 8400/PD has a blank front panel and must be controlled by Orban’s PC Remote application running on Microsoft Windows 98 or later. Both units have identical sound and features except for the difference in their front panels. Both units run the same software. Both the 8400 and 8400/PD can accept Orban’s HD (“High-Definition Digital Radio”) hardware plug-in, 8400HD. 8400HD adds an extra AES/EBU output to drive the digital channel in the iBiquity system. This output provides look-ahead peak limiting that oper-ates in parallel with the FM peak limiting. The look-ahead limiting is optimized to make the most of the limited bit-rate codec used in the iBiquity system’s digital channel. By eschewing any clipping, the HD output prevents the codec from wasting precious bits encoding clipping distortion products, allowing the codec to instead use its entire bit budget to encode the desired program material. 15 kHz band-limiting on the digital output also optimizes the operation of the low bit-rate codec. By not wasting bits encoding the 15-20 kHz frequency range that few radio listeners can hear, the codec instead provides higher quality encoding of the crucial 20-15,000 Hz band. 8400HD also adds a second analog output to the 8400 system. This can be configured to emit the 8400’s low-latency monitor signal, or to emit the signal that is processed for the HD digital channel.

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Service- und Bedienungsanleitung
Dokumenttyp:
Service- und Bedienungsanleitung
Seiten:
248
Größe:
3.20 Mbytes (3357431 Bytes)
Sprache:
english
Revision:
Dokument-ID:
96107-300-01
Datum:
2002 01 01
Qualität:
Elektronisches Dokument, kein Scan, sehr gut lesbar.
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2017 10 31
MD5:
2cf79d85330edb0a4c12a60a2a29508e
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760

Information

Manual for Version 3.0 and Higher Software 8400 OPTIMOD-FM DIGITAL AUDIO PROCESSOR ... 1-2 User-Friendly Interface ... 1-3 Absolute Control of Peak Modulation ... 1-3 Flexible Configuration ... 1-4 Adaptability through Multiple Audio Processing Structures ... 1-4 Controllable ... 1-5 PRESETS IN OPTIMOD-FM ... 1-6 Factory Presets ... 1-6 User Presets ... 1-6 INPUT/OUTPUT CONFIGURATION ... 1-6 Digital AES/EBU Left/Right Input/Output ... 1-7 Analog Left/Right Input/Output ... 1-7 Stereo Analog Baseband Composite Output ... 1-8 Subcarriers ... 1-8 Remote Control Interface ... 1-8 Computer Interface ... 1-9 LOCATION OF OPTIMOD-FM ... 1-10 Optimal Control of Peak Modulation Levels ... 1-10 Best Location for OPTIMOD-FM ... 1-11 STUDIO-TRANSMITTER LINK ... 1-13 Transmission from Studio to Transmitter ... 1-13 Using the Orban 8100AST (or 8100A/ST) Studio Chassis with the 8400 ... 1-16 STL and Exciter Overshoot ... 1-16 USING LOSSY DATA REDUCTION IN THE STUDIO ... 1-17 ABOUT TRANSMISSION LEVELS AND METERING ... 1-17 Meters ... 1-17 Studio Line-up Levels and Headroom ... 1-18 Fig. 1-1: Absolute Peak Level, VU and PPM Reading ... 1-18 Transmission Levels ... 1-19 LINE-UP FACILITIES ... 1-19 Metering of Levels ... 1-19 MONITORING ON L OUDSPEAKERS AND HEADPHONES ... 1-20 EAS TEST ... 1-22 W ARRANTY, FEEDBACK ... 1-23 User Feedback Form ... 1-23 INSTALLING THE 8400 ... 2-2 Fig. 2-1: AC Line Cord Wire Standard) ... 2-3 Fig. 2-2: Wiring the 25-pin Remote Interface Connector ... 2-5 8400 REAR PANEL ... 2-6 AUDIO INPUT AND OUTPUT C ONNECTIONS ... 2-7 Cable ... 2-7 Connectors ... 2-7 Analog Audio Input ... 2-7 Analog Audio Output ... 2-8 AES/EBU DIGITAL INPUT AND OUTPUT ... 2-8 COMPOSITE OUTPUT AND SUBCARRIER INPUT ... 2-9 Fig. 2-3: Separation vs. load capacitance for 8400 and Orban stereo encoders using 8200-style line driver (8200, 2200, 8208, and(8218). Test frequency = 15 kHz ... 2-10 GROUNDING ... 2-11 Power Ground ... 2-1 8400 FRONT PANEL ... 2-12 INSTALLATION OF STUDIO LEVEL Controller (OPTIONAL) ... 2-14 If you are using Orban 8200ST-Studio Chassis ... 2-14 Fig. 2-4: 8200ST Jumper Settings (*Factory Configuration) ... 2-15 If you are using Orban 464A Co-Operator ... 2-17 Fig. 2-5: 464A Jumper Settings ... 2-17 If you are using an Orban 4000 Transmission Limiter ... 2-19 Fig. 2-6: 4000 Jumper Locations ... 2-20 Fig. 2-7: 4000 HF Limiter Jumpers ... 2-20 Fig. 2-8: 4000 Pre-Emphasis Jumpers ... 2-21 Fig. 2-9: 4000 Pre-Emphasis Jumpers ... 2-21 Fig. 2-10: 4000 Stereo Coupling Jumpers ... 2-21 QUICK SETUP ... 2-23 ANALOG AND DIGITAL I/O SETUP ... 2-30 USING CLOCK-BASED AUTOMATION ... 2-39 SECURITY AND PASSCODE PROGRAMMING ... 2-40 To Unlock the Front Panel ... 2-42 8400 User Interface Behavior during Lockout ... 2-43 Default ADMIN Passcode ... 2-43 Security and Orban’s PC Remote Application ... 2-44 Doing a Software Update to an 8400 with Version 2.1 or Higher Already Installed: ... ... 2-45 ADMINISTERING THE 8400 THROUGH SERIAL PORT #2 ... 2-46 Connecting to the 8400 via a Terminal Program on a PC ... 2-47 Administrative Operations ... 2-48 Diagnostic Operations ... 2-51 REMOTE CONTROL INTERFACE PROGRAMMING ... 2-51 NETWORKING ... 2-52 SETTING UP AN 8400 MEMORY CARD ... 2-55 INSTALLING 8400 PC REMOTE CONTROL SOFTWARE ... 2-56 Installing the Necessary Windows Services ... 2-56 Check Hardware Requirements ... 2-57 Running the Orban Installer Application ... 2-58 ABOUT 8400/PD ... 2-59 ABOUT 8400HD ... 2-60 Delay Difference between Digital-Channel and FM Outputs ... 2-61 HD I/O Setup Controls ... 2-62 HD Audio Controls ... 2-64 8400 FRONT PANEL ... 3-2 INTRODUCTION 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 ... 3-5 Fundamental Requirements: High-Quality Source Material and Accurate Monitoring ... 3-5 ABOUT THE 8400’S SIGNAL PROCESSING FEATURES ... 3-6 Dual-Mono Architecture ... 3-6 Signal Flow ... 3-6 ITU-R 412 Compliance ... 3-11 Two-Band Purist Processing ... 3-12 Digital Radio Processing ... 3-12 Input/Output Delay ... 3-13 Summary ... 3-13 CUSTOMIZING THE 8400’S SOUND ... 3-13 Basic Modify ... 3-14 Intermediate Modify ... 3-1 Advanced Modify ... 3-15 Gain Reduction Metering ... 3-16 ABOUT THE PROCESSING STRUCTURES ... 3-16 FACTORY PROGRAMMING PRESETS ... 3-17 Factory Programming Presets ... 3-17 Table 3-1: Factory Programming Presets ... 3-19 Equalizer CONTROLS ... 3-24 Table 3-2: Five-Band Equalization Controls ... 3-24 STEREO ENHANCER CONTROLS ... 3-28 Table 3-3: Stereo Enhancer Controls ... 3-29 AGC CONTROLS ... 3-30 Table 3-4: AGC Controls ... 3-30 Advanced AGC Controls ... 3-33 CLIPPER CONTROLS ... 3-35 Table 3-5: Clipper Controls ... 3-36 Fig. 3-1: 0-100 kHz Baseband Spectrum (Loud-Hot preset) ... 3-39 Fig. 3-2: 19 kHz Pilot Notch Filter Spectrum (Loud-Hot preset; detail) ... 3-39 Advanced Clipper Controls ... 3-40 THE TWO-BAND STRUCTURE ... 3-41 The Protection Presets ... 3-41 Setting Up the Two-Band Structure for Classical Music ... 3-41 Customizing the Settings ... 3-43 The Two-Band Structure’s Full Setup Controls ... 3-43 Table 3-6: Two-Band Controls ... 3-43 Advanced Two-Band Controls ... 3-46 THE FIVE -BAND STRUCTURE ... 3-47 Putting the Five-Band Structure on the Air ... 3-47 Customizing the Settings ... 3-48 The Five-Band Structure’s Full Setup Controls ... 3-48 Table 3-7: Multiband Controls ... 3-48 Table 3-8: MB Attack/Release Controls ... 3-49 Table 3-9: MB Band Mix Controls ... 3-49 Advanced Multiband and Band Mix Controls ... 3-54 ITU-R MULTIPLEX POWER Controller ... 3-57 TEST MODES ... 3-59 Table 3-10: Test Modes ... 3-59 GETTING THE Bass SOUND YOU WANT ... 3-60 USING THE 8400 PC REMOTE CONTROL SOFTWARE ... 3-62 Navigation Using the Keyboard ... 3-66 ROUTINE MAINTENANCE ... 4-2 REMOVING AND REPLACING PARTS AND ASSEMBLIES ... 4-2 FIELD AUDIT OF PERFORMANCE ... 4-8 Table 4-1: Decoder Chart for Power Supervisor ... 4-10 Table 4-2: Layout Diagram of J7, with expected voltages on each pin ... 4-11 Table 4-3: Typical Power Supply Voltages and AC Ripple ... 4-11 PROBLEMS AND POTENTIAL SOLUTIONS ... 5-2 Headphones Don’t Work ... 5-2 RFI, Hum, Clicks, or Buzzes ... 5-2 Poor Peak Modulation Control ... 5-2 Audible Distortion On-Air ... 5-3 Audible Noise on Air ... 5-3 Whistle on Air, Perhaps Only in Stereo Reception ... 5-4 Interference From Stereo Into SCA ... 5-5 Shrill, Harsh Sound ... 5-6 Dull Sound ... 5-6 System Will Not Pass Line-Up Tones at 100% Modulation ... 5-6 System Will Not Pass Emergency Alert System (“EAS” USA Standard) Tones at the Legally Required Modulation Level ... 5-6 System Receiving 8400’s Digital Output Will Not Lock ... 5-7 19 kHz Frequency Out-of-Tolerance ... 5-7 L–R (Stereo Difference Channel) Will Not Null With Monophonic Input ... 5-7 General Dissatisfaction with Subjective Sound Quality ... 5-7 Security Passcode Lost (When Unit is Locked Out) ... 5-7 Connection Issues between the 8400 and a PC, Modem, or Network ... 5-8 Troubleshooting Connections ... 5-9 OS-Specific Troubleshooting Advice ... 5-9 TROUBLESHOOTING IC OPAMPS ... 5-14 TECHNICAL S UPPORT ... 5-15 FACTORY SERVICE ... 5-15 SHIPPING INSTRUCTIONS ... 5-15 SPECIFICATIONS ... 6-2 Performance ... 6-2 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 ... 6-12 ABBREVIATIONS ... 6-13 PARTS LIST ... 6-14 Obtaining Spare Parts ... 6-15 Power Supply ... 6-15 Input/Ouput Circuit Board ... 6-16 Front Panel Subassembly ... 6-18 Display Circuit Board ... 6-18 Display Interface Circuit Board ... 6-19 Composite Input/Output Circuit Board ... 6-20 Control Circuit Board ... 6-20 SCHEMATICS, ASSEMBLY DRAWINGS ... 6-21 Figure 6-1: Main Circuit Board Locator ... 6-22

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