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AEV MIRAGE MK III - User Manual

AEV MIRAGE MK III
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MIRAGE MK III - Broadcast Audio Processor
AEV Broadcast Srl via della Tecnica 33, 40050 Argelato Bologna ITALY
www.aev.eu info@aev.eu
1
AEV
MIRAGE
Broadcast Audio Processor 3-band
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Summary

Safety Precautions

Introduction and System Overview

General Description

Provides an overview of the MIRAGE AM Audio Processor as a complete audio signal processing system for AM transmission.

Total Control of Peak Modulation

Explains the MIRAGE's dynamic control over audio signal levels and peak limiting for FM transmission, ensuring clear sound.

Concepts of Audio Processing

Defines average and peak values in sound, explaining how peak/average ratio affects sound quality and the role of clipping.

Initial Power-Up

Instructions for initial power-up, emphasizing voltage checks and proper grounding of the MIRAGE unit.

Command Description

Front Panel Controls

Details the functions of the front panel controls, including LED bar displays, potentiometers, and switches.

Rear Panel Connections

Describes the rear panel input/output sockets, trimmers, and switches for system configuration and synchronization.

Processor Adjustments

Operate; By-Pass Operation

Explains the function of the Operate/By-Pass switch and its effect on signal processing.

Bass Control

Adjusts gain for low frequencies up to +10 dB with a center frequency at 65 Hz for sound depth.

Presence Control

Adjusts frequency expansion gain up to +6dB over the 300-3300 Hz band for an "immediate" sound.

Brillance Control

Adjusts expansion for higher frequencies up to +6dB over the 3300-15,000 Hz band for a "brilliant" sound.

Density Control

Controls signal expansion before compression across the audio spectrum, affecting dynamic range.

AGC Drive and Release

Manages Automatic Gain Control (AGC) by adjusting attack (DRIVE) and release (RELEASE) times for input signals.

Additional Processor Settings

Gate Threshold

Determines the threshold at which the processor becomes active, disabling AGC if input signal is below.

Input Level Adjustment

Adjusts input signal level using multiturn trimmers to achieve an optimal AGC level.

Output Level Adjustment

Controls output signal level via trimmers for maximum allowable deviation at the transmitter.

Pre-Emphasis and De-Emphasis

Details dynamic pre-emphasis and selectable de-emphasis configuration via dip-switch.

Encoder Adjustments

Covers adjustments for the stereo encoder: Pilot Level, Pilot Phase, MPX Mode, Composite Out, and SCA Input.

Configuration and Connections

General Features

Outlines the unit's features: analog I/O, composite stereo output (MPX), and optional boards for external effects.

Connection Recommendations

Recommends using high-quality, shielded cables and paying attention to grounding to avoid interference.

Input and Output Specifications

Details XLR input/output impedance, input levels (-20 to +10 dBm), and output levels (0 to +12 dBm).

Encoder Board I;O

Describes stereo encoder output (BNC), SCA/RDS inputs, and SYNC 19 KHz OUT for external encoders.

MIRAGE Positioning

Advises on optimal placement near the transmitter and avoiding apparatus that could alter bandwidth.

Location and Technical Specifications

Optimal Location

Recommends installing the MIRAGE close to the transmitter for maximum transmission quality.

Frequency Response

Specifies frequency response as 30 Hz - 15 KHz ± 0.3 dB (By-pass) and AGC control range.

Noise and Distortion

Details output noise characteristics and total distortion figures for different conditions.

Crosstalk

Provides crosstalk specifications for L/R and R/L channels, indicating signal isolation.

Audio Input Details

Specifies input configuration, impedance (10 kΩ balanced), input level (-20 to +10 dBm), and connector type (XLR).

Audio Output Details

Specifies output configuration, impedance (100 Ω balanced), output level (0 to +12 dBm), and connector type (XLR).

Stereo Encoder Specifications

Lists specifications for the stereo encoder including pilot frequency, distortion, S/N ratio, and stereo separation.

General Data and Interfaces

Composite Output

Specifies composite output impedance (50 Ω), connector type (BNC), and maximum cable length (10m).

Pilot Reference Output

Details pilot reference output impedance (600 Ω) and connector type (BNC).

SCA and RDS Inputs

Specifies SCA input impedance (10 kΩ) and RDS input impedance (10 kΩ) with associated levels.

General Specifications

Provides power supply, power consumption, dimensions (1 rack unit), weight, and operating temperature.

Pin Out I;O Audio Interface

Diagram and list of pin assignments for the I/O audio interface connector.

Connection Examples and Dip Switches

Balanced Connection Example

Illustrates an example of a balanced connection using XLR connectors for audio signals.

Unbalanced Connection Example

Illustrates an example of an unbalanced connection using XLR connectors for audio signals.

Dip Switch Settings

Details the functions of the 8-position DIP switch for configuring input impedance, pre/de-emphasis, and stereo/mono modes.

Summary

Safety Precautions

Introduction and System Overview

General Description

Provides an overview of the MIRAGE AM Audio Processor as a complete audio signal processing system for AM transmission.

Total Control of Peak Modulation

Explains the MIRAGE's dynamic control over audio signal levels and peak limiting for FM transmission, ensuring clear sound.

Concepts of Audio Processing

Defines average and peak values in sound, explaining how peak/average ratio affects sound quality and the role of clipping.

Initial Power-Up

Instructions for initial power-up, emphasizing voltage checks and proper grounding of the MIRAGE unit.

Command Description

Front Panel Controls

Details the functions of the front panel controls, including LED bar displays, potentiometers, and switches.

Rear Panel Connections

Describes the rear panel input/output sockets, trimmers, and switches for system configuration and synchronization.

Processor Adjustments

Operate; By-Pass Operation

Explains the function of the Operate/By-Pass switch and its effect on signal processing.

Bass Control

Adjusts gain for low frequencies up to +10 dB with a center frequency at 65 Hz for sound depth.

Presence Control

Adjusts frequency expansion gain up to +6dB over the 300-3300 Hz band for an "immediate" sound.

Brillance Control

Adjusts expansion for higher frequencies up to +6dB over the 3300-15,000 Hz band for a "brilliant" sound.

Density Control

Controls signal expansion before compression across the audio spectrum, affecting dynamic range.

AGC Drive and Release

Manages Automatic Gain Control (AGC) by adjusting attack (DRIVE) and release (RELEASE) times for input signals.

Additional Processor Settings

Gate Threshold

Determines the threshold at which the processor becomes active, disabling AGC if input signal is below.

Input Level Adjustment

Adjusts input signal level using multiturn trimmers to achieve an optimal AGC level.

Output Level Adjustment

Controls output signal level via trimmers for maximum allowable deviation at the transmitter.

Pre-Emphasis and De-Emphasis

Details dynamic pre-emphasis and selectable de-emphasis configuration via dip-switch.

Encoder Adjustments

Covers adjustments for the stereo encoder: Pilot Level, Pilot Phase, MPX Mode, Composite Out, and SCA Input.

Configuration and Connections

General Features

Outlines the unit's features: analog I/O, composite stereo output (MPX), and optional boards for external effects.

Connection Recommendations

Recommends using high-quality, shielded cables and paying attention to grounding to avoid interference.

Input and Output Specifications

Details XLR input/output impedance, input levels (-20 to +10 dBm), and output levels (0 to +12 dBm).

Encoder Board I;O

Describes stereo encoder output (BNC), SCA/RDS inputs, and SYNC 19 KHz OUT for external encoders.

MIRAGE Positioning

Advises on optimal placement near the transmitter and avoiding apparatus that could alter bandwidth.

Location and Technical Specifications

Optimal Location

Recommends installing the MIRAGE close to the transmitter for maximum transmission quality.

Frequency Response

Specifies frequency response as 30 Hz - 15 KHz ± 0.3 dB (By-pass) and AGC control range.

Noise and Distortion

Details output noise characteristics and total distortion figures for different conditions.

Crosstalk

Provides crosstalk specifications for L/R and R/L channels, indicating signal isolation.

Audio Input Details

Specifies input configuration, impedance (10 kΩ balanced), input level (-20 to +10 dBm), and connector type (XLR).

Audio Output Details

Specifies output configuration, impedance (100 Ω balanced), output level (0 to +12 dBm), and connector type (XLR).

Stereo Encoder Specifications

Lists specifications for the stereo encoder including pilot frequency, distortion, S/N ratio, and stereo separation.

General Data and Interfaces

Composite Output

Specifies composite output impedance (50 Ω), connector type (BNC), and maximum cable length (10m).

Pilot Reference Output

Details pilot reference output impedance (600 Ω) and connector type (BNC).

SCA and RDS Inputs

Specifies SCA input impedance (10 kΩ) and RDS input impedance (10 kΩ) with associated levels.

General Specifications

Provides power supply, power consumption, dimensions (1 rack unit), weight, and operating temperature.

Pin Out I;O Audio Interface

Diagram and list of pin assignments for the I/O audio interface connector.

Connection Examples and Dip Switches

Balanced Connection Example

Illustrates an example of a balanced connection using XLR connectors for audio signals.

Unbalanced Connection Example

Illustrates an example of an unbalanced connection using XLR connectors for audio signals.

Dip Switch Settings

Details the functions of the 8-position DIP switch for configuring input impedance, pre/de-emphasis, and stereo/mono modes.

AEV MIRAGE MK III Specifications

General IconGeneral
ProcessorIntel Core i9-13900K
Operating SystemWindows 11 Pro
Graphics CardNVIDIA GeForce RTX 4090
Storage2TB NVMe SSD
Cooling SystemCustom Liquid Cooling