What causes a whistle on air, perhaps only in stereo reception, with my Orban Processor?
A whistle can be caused by oscillation in the analog input or output circuitry, so check the analog or digital outputs with a spectrum analyzer to see if the spurious tone can be detected. It can also be due to power supply oscillation, STL problems, or exciter problems, so check for oscillation or issues in these areas.
What causes L–R (Stereo Difference Channel) to not null with monophonic input on my Orban Processor?
This is caused by relative phase shifts between the left and right channels prior to the 8300’s input. Check the phase alignment of the inputs.
Explains manual navigation features like hyperlinks, bookmarks, and text search.
Introduces the processor, highlighting its digital processing and quality.
Describes the processor's interface with LCD, LEDs, buttons, and rotary knob for easy operation.
Details the processor's transmitter protection and audio processing capabilities for FM broadcast.
Covers analog and AES3 digital I/O, internal stereo encoder, and subcarrier inputs for versatile setup.
Explains the three processing structures (Five-Band, Low-Latency Five-Band, Two-Band) for different audio needs.
Discusses remote control options via GPI, PC Remote software, and automation features.
Explains the two types of presets: Factory Presets and User Presets for system configuration.
Details the supported I/O options: Digital AES3, Analog, Composite stereo, and Subcarrier inputs.
Provides guidance on optimal placement for controlling peak modulation levels.
Recommends placing the unit near the transmitter for best performance and signal path.
Discusses different types of STLs and their implications for signal transmission from studio to transmitter.
Describes the variable quality of analog landlines and their impact on audio.
Explains how to integrate an external AGC system for STL protection.
Addresses issues of overshoot in STLs and exciters and how the 8300's remote control can help.
Advises on using lossy data reduction techniques and their potential impact on audio quality.
Explains how transmission engineers measure audio levels and the function of different meters.
Discusses calibrating equipment for proper input/output levels and headroom.
Covers the transmission engineer's concern with peak levels to prevent overloading.
Details the built-in metering and test tone capabilities for system calibration.
Explains the use of test tone oscillators for matching output levels and transmission system calibration.
Describes the bypass test mode for transparently passing signals for alignment or performance tests.
Discusses potential issues with headphone monitoring and audio coloration from digital processors.
Provides methods for running EAS tones and data through the 8300.
Covers PC software control, access, and security features including passcodes.
Outlines warranty terms and encourages user feedback for product improvement.
Details options for purchasing an extended warranty period for the product.
Provides a step-by-step guide for installing the OPTIMOD-FM 8300 unit.
Instructions for safely unpacking the unit and checking for any physical damage or missing items.
Guide to verifying and setting the correct line voltage, installing fuses, and checking the power cord.
Explains how to set the ground lift switch to prevent ground loops.
Instructions for securely mounting the unit in a standard rack, considering heat and vibration.
Details on connecting various audio and digital inputs and outputs to the unit.
Information on connecting external remote control devices via the GPI interface.
Instructions for connecting the unit to a PC via serial or Ethernet for remote control.
Describes the various connectors and switches located on the rear panel of the 8300 unit.
Explains proper grounding techniques for optimal performance and safety.
Describes the controls and display elements on the front panel of the 8300 unit.
Guidance on installing optional studio level controllers like the Orban 8200ST external AGC.
A guided setup procedure for basic analog-FM facility configuration.
Instructions for selecting the correct pre-emphasis setting (50µS or 75µS) for your country.
Configuration for using an external AGC device, disabling the 8300’s internal AGC if necessary.
How to choose between analog and digital audio inputs for the unit.
Procedures for setting input levels to optimize the Automatic Gain Control (AGC) operation.
Setting the analog output for flat frequency response or pre-emphasis.
Configuring the digital output for flat frequency response or pre-emphasis.
Adjusting the composite output level to achieve 100% modulation.
How to use the internal clock for automating events like preset changes.
Setting up passcodes and security levels to protect unit programming.
Configuring network connections (Ethernet, modem, serial) for remote control.
Setting up automatic clock synchronization with an internet time server.
Guide to installing the PC Remote software required for computer control.
Detailed instructions for setting up direct serial and modem connections to a PC.
Overview of the front panel controls including display, buttons, knob, and status indicators.
Explains fundamental audio processing concepts like compression, limiting, and clipping.
Details the various signal processing blocks and their functions within the 8300.
Guides on adjusting subjective setup controls to tailor the station's sound.
Describes the initial level of control over stereo enhancer, equalizer, and dynamics.
Explains the detailed front-panel control level for dynamics processing.
Outlines advanced controls accessible only via PC Remote software for fine-tuning.
Steps for saving customized settings as a user preset for future recall.
Explains the three main processing structures: Two-Band, Normal Five-Band, and Ultra-Low Latency Five-Band.
Lists and describes the factory-recommended settings for various program formats.
Details the parameters for bass, midrange, and high-frequency equalization.
Explains controls for enhancing stereo imaging and width.
Covers the Automatic Gain Control settings for managing audio levels and consistency.
Describes controls related to clipping and limiting, including bass clipping and final clipping.
Details the architecture and operation of the two-band processing structure.
Guides users on adjusting bass controls for desired sound, considering psychoacoustics and distortion.
Instructions for using the PC Remote software for full control, backups, and updates.
Describes minimal recommended maintenance procedures for the unit.
Detailed steps for removing and replacing internal subassemblies and components.
Outlines a procedure for testing unit performance using specialized equipment.
A comprehensive guide to diagnosing and resolving common issues with the unit.
Addresses potential interference and noise issues, likely related to grounding or cabling.
Discusses possible causes for low on-air audio levels, such as the multiplex power controller.
Explains how signal path issues can affect peak modulation control and suggests checks.
Identifies common causes of audible distortion, including extreme settings and source material.
Discusses how excessive compression can amplify source material noise.
Explains that whistles may be caused by analog output oscillation or power supply issues.
Details how to diagnose and prevent stereo interference affecting subcarriers using a spectrum analyzer.
Identifies potential causes of shrill or harsh sound, such as excessive HF boost.
Discusses how source material and output settings can lead to a dull-sounding output.
Explains why sine wave tones might not reach 100% modulation due to processing.
Advice on handling EAS tones, suggesting bypass or injection directly to the transmitter.
Troubleshooting steps for digital output signal lock issues, focusing on sample rate and mode matching.
Guidance on verifying and addressing 19 kHz pilot tone frequency issues.
Discusses factors affecting overall sound quality and competitiveness.
Refers to procedures for unlocking the unit if the passcode is lost.
Covers troubleshooting connection problems between the unit and external devices.
Steps to resolve connection errors related to incorrect interface types or cable issues.
Explains how the PPP connection defaults to the 8300's IP, preventing other network access.
Provides OS-specific troubleshooting steps for connection issues.
Detailed steps for resolving direct connection problems in Windows 2000.
Steps to resolve modem connection issues within Windows 2000.
Specific troubleshooting steps for direct connections using Windows XP.
Troubleshooting steps for modem connections using Windows XP.
Guidance on diagnosing issues related to integrated circuit operational amplifiers.
Contact information and advice for obtaining technical assistance from Orban.
Procedures and recommendations for returning the unit for factory service.
Guidelines for securely packing and shipping the unit for service or return.
Presents key technical specifications to aid engineers in installation and comparison.
Details performance metrics for analog and digital I/O, including frequency response and noise.
Provides technical data related to the unit's installation parameters like delay and connectors.
Specifies processing delay times for different structures and relative delay between HD and FM chains.
Technical details on configuration, impedance, level, and connectors for analog audio input.
Technical specifications for analog audio output, including configuration, impedance, and level.
Details on digital audio input configuration, resolution, and connectors per AES3 standard.
Technical data for the composite baseband outputs, including level control and connectors.
Provides a detailed breakdown of the unit's internal circuitry and functional blocks.
Describes the microprocessor-based control circuit and its communication pathways.
Details the physical interface components like switches, LEDs, and rotary encoder.
Explains the functionality and circuitry of the remote control and serial interfaces.
Explains the design and operation of the LED meter displays.
Covers the circuitry for interfacing analog and digital audio inputs to the DSP.
Technical specifications of the stereo A/D converter and its oversampling process.
Information on the digital input receiver and its sample rate conversion capabilities.
Describes the circuitry for interfacing the DSP to the analog and digital audio outputs.
Technical details of the stereo D/A converter responsible for digital-to-analog audio conversion.
Explains the filtering, amplification, and driver stages for the analog audio outputs.
Details the SRC and AES3 transmitter chip for digital audio output.
Describes the circuitry for the composite D/A converter, attenuators, and SCA summing.
Provides a glossary of abbreviations used throughout the manual.
Lists the various parts used in the 8300 unit, including component identifiers.
Information on how to obtain replacement parts from the factory or distributors.
Lists parts associated with the base board assembly.
Lists components belonging to the CPU module.
Lists components for the RS-232 serial interface board.
Technical data and component list for the unit's power supply.
Lists components for the input/output board.
Lists components associated with the DSP board.
Lists components for the display board.
Refers to diagrams showing actual construction and component locations for troubleshooting.
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