The Marconi IFR Aeroflex COMM-760 Communication Test Set is a dual-channel transmitter and receiver test instrument designed for avionics communication systems verification. It measures frequency, power, modulation, and audio performance across 720+ channels in modern transceivers. The COMM-760 delivers signal accuracy of ±0.2 dB and operates across 118 MHz to beyond 1 GHz, supporting both field and laboratory maintenance workflows.
Technical Specifications
Transmitter Testing
• Frequency measurement and error display relative to NAV-750-commanded frequency
• Power measurement capabilities
• Modulation sensitivity measurement via integrated audio oscillator and percent-of-modulation circuitry
Receiver Testing
• Audio output level measurement: 0.1 to 8 V RMS
• Signal + Noise to Noise ratio (S+N/N) measurement
• Frequency response analysis using audio oscillator
• Carrier override squelch threshold verification
Signal Generation
• Modulation oscillator: 1020 ± 5 Hz, 0–1.8 V RMS into 100 Ω, 3% THD max (0.5% typical at 1020 Hz)
• Audio oscillator for receiver characterization
• Signal accuracy: ±0.2 dB
Operating Range
• Frequency: 118 MHz to beyond 1 GHz
• Channel capacity: 720+ channels per transceiver
Interfaces
• USB, Ethernet, RS-232 for PC connectivity and automated control
– Key Features
• Simultaneous transmitter and receiver parameter measurement
• Full-channel scanning on multi-channel transceivers
• Integration with NAV-750 signal generator for automated go/no-go channel verification
• Modulation frequency stability: 1020 ± 5 Hz for S+N/N measurements
– Typical Applications
• Avionics transceiver maintenance and acceptance testing
• Field troubleshooting and performance verification
• Automated channel validation in laboratory environments
• Audio quality and modulation analysis
– Compatibility & Integration
Supports type-acceptance, MIL-STD-461E, DO-178, and DO-160 standards. Pairs with NAV-750 for rapid multi-channel verification and automatic frequency selection.
