The Marconi IFR Aeroflex 2955A is a self-contained radio communication test set that combines RF signal generation, power measurement, and frequency analysis in a single portable instrument. Operating from 0.4 MHz to 1000 MHz, it delivers comprehensive testing of AM, FM, and PM modulated mobile radio transceivers. The integrated design supports benchtop and field deployment with modulation capabilities spanning AM depths to 99%, FM deviation to 30 kHz, and phase modulation to 10 radians.
Technical Specifications
RF Signal Generator
• Frequency range: 0.4 MHz to 1000 MHz (usable to 1060 MHz)
• Output level: –140 dBm to –20 dBm (N-type), –120 dBm to 0 dBm (BNC); RF output power up to 1 W
• Output impedance: 50 Ω nominal
• VSWR: <1.2:1 to 500 MHz, <1.5:1 to 1000 MHz (N-type); <2.2:1typical (BNC)
• Frequency resolution: 50 Hz to 530 MHz; 100 Hz to 1000 MHz; 1 Hz from 20 Hz to 3.25 kHz
• AM modulation: depth variable to 99% (0.4–500 MHz), distortion 1 W (BNC), >75 W (N-type)
RF Frequency Meter
• Frequency range: 1.5 to 1000 MHz
• Resolution: 1 Hz or 10 Hz to 200 MHz; 10 Hz to 1000 MHz
• Accuracy: ±1 digit relative to internal standard
Audio Generator
• Frequency range: 20 Hz to 20 kHz
• Output level: 1 mV to 2.55 V
– Key Features
• Modular test capability: signal generation, power measurement, and frequency analysis in one unit
• Dual RF output ports with optimized impedance matching and power handling
• Wide modulation bandwidth supporting narrowband and wideband communications standards
• Precision frequency resolution to 1 Hz at audio frequencies
• High output power delivery—1 W RF carrier with clean modulation envelope
– Typical Applications
• Two-way mobile radio transceiver alignment and performance verification
• AM/FM/PM modulation fidelity and deviation measurement
• Transmitter power and frequency accuracy validation
• Field service and bench troubleshooting of radio communications equipment
– Compatibility & Integration
Standard N-type and BNC connectors support integration with existing test infrastructure. Audio input/output enables direct stimulus-response testing of receiver chains.
