The Marconi IFR Aeroflex 2945 is a 1 GHz communications service monitor that combines RF signal generation, spectrum analysis, power measurement, and modulation analysis in a single portable instrument. Designed for field and benchtop deployment, it delivers fast frequency switching, full duplex capability, and accurate RF characterization across AM, FM, and SSB modulation formats. The integrated 50 kHz digital storage oscilloscope, dual audio generators, and frequency counter provide complete signal verification and troubleshooting for mobile, professional, and cellular communication systems.
Technical Specifications
RF Signal Generator
• Frequency range: 400 kHz to 1.05 GHz
• Output power: +5 dBm nominal (+7 dBm overrange)
• Level accuracy: ±2 dB at all levels above -127 dBm
• Modulation: AM, FM, SSB
• Standard duplex operation with unrestricted offset tracking
• Built-in analog cellular standards: AMPS, TACS, NMT with country variants
Spectrum Analyzer
• Frequency range: 100 kHz to 1.05 GHz (manual); 10 MHz to 1 GHz (auto-tune)
• Spans: 1 kHz/div to full; continuously variable or 1-2-5 sequence
• Resolution bandwidth: 300 Hz, 3 kHz, 30 kHz, 300 kHz, 3 MHz
• Display: Color transflective LCD with superfast refresh rate
RF Power Meter
• Measurement range: 2 µV to 150 Watts
• Accuracy: Better than 10% down to 5 mW on N-Type connector
• Standard protection: 5 Watts on all RF ports; 150 W for limited periods (1 minute at 20°C) on N-Type
• Audible and visual overload indication
Modulation Meter
• AM/FM/SSB demodulation supported
• FM accuracy (1 kHz modulation): ±5% ±1 digit
• FM accuracy (50 Hz to 10 kHz modulation): ±7.5% ±1 digit
• Demodulation distortion (FM, 1 kHz & 5 kHz): Less than 2% CCITT weighted
• Residual FM: Less than 30 Hz (300 Hz to 3.4 kHz bandwidth)
Digital Storage Oscilloscope
• Bandwidth: 50 kHz
• Sweep speed: 50 µs/div to 5 s/div
• Transient and harmonic analysis
Audio Section
• Two comprehensive audio generators standard
• Band pass, low pass, high pass filters standard
• Optional psophometric weighting filters
• CTCSS measurement with 300 Hz filter
• DC-coupled FM external input
Frequency Counter
• Range: 100 kHz to 1.05 GHz
• Resolution: 1 Hz or 10 Hz
– Key Features
• Fast RF switching and full-span spectrum display with ‘live’ look and listen
• Tracking generator with full offset capability
• PCMCIA memory card storage for settings and results
• RS-232 control; optional IEEE 488.2 interface
• Parallel printer port
– Typical Applications
Field and bench service of AM/FM/SSB transceivers, analog cellular handsets and infrastructure, professional mobile radios, and communications equipment verification across 400 kHz to 1.05 GHz.
