The Marconi IFR Aeroflex 2955R is a 1 GHz radio communication test set engineered for transmit and receive testing of RF equipment across 0.4 MHz to 1 GHz. This portable instrument combines RF signal generation, power measurement, frequency analysis, and audio demodulation in a single unit suitable for benchtop and field service operations.
Technical Specifications
Frequency Coverage
• RF Signal Generators: 0.4 MHz to 1 GHz with 50 Hz resolution to 530 MHz, 100 Hz to 1 GHz
• RF Analyzer: 1.5 MHz to 1 GHz
• Frequency Meter: 1.5 MHz to 1000 MHz with 1 Hz or 10 Hz resolution
• Audio Frequency Counter: 20 Hz to 20 kHz
Signal Generation
• RF Output: -140 dBm to -20 dBm from N-type socket; -120 dBm to 0 dBm from BNC output (0.1 dBm resolution)
• Audio Generators: 50 Hz to 15 kHz (1 mV to 2.55 V to 5 kHz; 1 mV to 2 V to 15 kHz); dual AF generators from 20 Hz to 20 kHz for single-tone or two-tone testing
• Waveforms: Sine, square, triangle, saw-tooth
Modulation Capabilities
• Modulation Types: AM, FM, Phase Modulation
• Modulation Meter: 0 to 25 kHz range, 1 Hz to 50 kHz modulation frequency
• Residual FM: <13 Hz rms to 520 MHz (typical 10 Hz); <26 Hz to 1000 MHz (typical 20 Hz)
• Residual AM: <0.5%
• Harmonics: <-20 dBc to 1.5 MHz, -25 dBc to 250 MHz, -20 dBc to 1000 MHz
RF Measurement
• Power Meter: 1.5 to 1000 MHz, up to 75 W continuous or 150 W short-duration; max input 30/75 W (N-type) or 0.5 W (BNC)
• RX Sensitivity (N-type): -135 dBm to -15 dBm; (BNC): -15 dBm to 5 dBm
• VSWR: <1.2 to 500 MHz, <1.3 to 1000 MHz (N-type); <2.2 to 1000 MHz (BNC)
Audio Analysis
• AF Frequency Counter, voltmeter, distortion meter, and S/N/SINAD measurements
• Demodulation Distortion (AM): <2% at 21 MHz carrier and above
– Key Features
• Dual-socket RF architecture (N-type and BNC connectors)
• Off-air receiver for direct transmitter monitoring
• Integrated AF and RF analysis on single platform
– Typical Applications
Field service, transmitter alignment, receiver sensitivity verification, modulation quality assessment, and multi-function RF equipment testing.
