The IFR Aeroflex IFR4000 NAV/COMM Test Set is a benchtop RF test instrument designed for precise testing and calibration of aircraft navigation and communication systems. It delivers comprehensive VOR, ILS, marker beacon, and ADF simulation alongside VHF/UHF transmitter and receiver verification. Built for avionics maintenance facilities, repair depots, and flight line operations, the IFR4000 ensures compliance with aviation standards and operational readiness through signal generation, measurement, and audio analysis capabilities.
Technical Specifications
RF Generation & Measurement
• Frequency Range: 100 kHz to 400 MHz (VHF/UHF communications); 108 MHz to 118 MHz (VOR/ILS); 75 MHz (Marker Beacon); 100 kHz to 2 MHz (ADF)
• Output Power: Variable with precise control
• Modulation: AM (communication, VOR signals); FM (communication signals); Pulse (DME simulation)
• Signal Purity: Low phase noise and spurious emissions
• Sensitivity Measurement: Capable across multiple bands
Navigation System Testing
• VOR: Variable TO/FROM indication, radial output, CDI output, and ambiguity simulation
• ILS: Localizer and Glide Slope signal generation with simultaneous LOC/GS capability, variable CDI output, and Warning Flag simulation
• Marker Beacon: Simultaneous Outer, Middle, and Inner marker simulation with variable audio tone levels
• ADF: Variable frequency output and relative bearing simulation
Communication System Testing
• VHF/UHF Transmitters: Frequency selection and stability verification, output power measurement, modulation accuracy (AM), audio frequency response and distortion
• VHF/UHF Receivers: Sensitivity testing (SINAD, S/N ratio), selectivity testing, audio output level and distortion
Audio Testing
• Audio Generator: Variable frequency and amplitude sine wave and square wave outputs
• Audio Analyzer: Measures audio levels, frequency response, and distortion (THD)
– Key Features
• Portable benchtop configuration for field and depot operations
• Simultaneous multi-system signal generation
• Low phase noise output for accurate receiver testing
• Integrated audio analysis and generation
– Typical Applications
• Aircraft navigation receiver calibration and verification
• Communication transceiver bench testing
• Marker beacon system validation
• Audio circuit and intercom testing
• Flight line maintenance operations
– Compatibility & Integration
Manufactured by IFR Aeroflex (now part of Cobham AvComm). Supports standard avionics interfaces and test configurations.
