The Marconi IFR Aeroflex COM120C is a 1 GHz radio communications test set that combines signal generation, reception, and analysis functions into a single digitally synthesized instrument. Designed for field service, maintenance, and production environments, it delivers comprehensive testing capabilities for analog and digital wireless equipment across the 250 kHz to 1000 MHz band.
Technical Specifications
Signal Generation & Reception
• Frequency range: 250 kHz to 1000 MHz
• Output level: -130 dBm to -13 dBm
• Modulation types: AM, FM, PM, external modulation, DTMF, user-defined tone codes, and digital codes
• Amplitude modulation: Up to 99.9% depth with 0.1% resolution; 1 dB bandwidth of 30 kHz
• Frequency modulation: 0 to 100 kHz deviation; 1 dB bandwidth of 100 kHz; AC or DC coupled selection
• Phase modulation: 0 to 10 radians deviation; 3 dB bandwidth to 10 kHz
• Pulse modulation: On/off ratio >40 dB; rise time <10 µs
• Modulation oscillator: 0.01 Hz to 20 kHz with sine, triangular, and square waveforms
Metering Functions
Receive operation measures RF power, AM/FM/PM modulation, deviation, distortion, frequency error, AF frequency, received level, SINAD, and audio counter.
Analysis Instruments
• Digitized 50 kHz oscilloscope with single trace operation
• Full scan spectrum analyzer (split screen, digitized) to 1 GHz; monitors 250 kHz to 1000 MHz internal and external signals
Duplex Operation
RF generator and receiver operate simultaneously with offset frequencies up to ±999.7500 MHz.
Audio Generation
Two audio generators: one variable 10 Hz to 20 kHz, one fixed 1 kHz tone. Waveforms include sine, square, triangle, and ramp.
User Configuration
50 user-defined setups for rapid test sequence deployment.
– Key Features
• CW and modulated signal generation across full frequency range
• Dual-tone and external modulation source support
• Frequency sweep via predetermined frequency lists
• Duplex-capable transceiver operation
• Integrated test instrumentation eliminates external equipment needs
– Typical Applications
Two-way radio service and alignment; portable and mobile radio maintenance; production testing of RF communication equipment; field troubleshooting of analog and digital wireless systems.
– Compatibility & Integration
Legacy Marconi IFR service monitor heritage ensures compatibility with established radio testing workflows and operator familiarity.
