The Marconi IFR Aeroflex 3920B is a dual-channel analog and digital radio test platform engineered for engineering, production, and field service applications. It delivers accurate RF measurements, audio analysis, and modulation testing across a broad frequency range, making it suitable for telecommunications professionals testing diverse radio communication standards. The platform integrates RF signal generation, spectrum analysis, and audio measurement in a single instrument, supported by 0.01 ppm frequency stability and -140 dBm typical sensitivity.
Technical Specifications
RF Capabilities
• Frequency Range: 10 MHz to 1.05 GHz standard; extends to 2.7 GHz with option 392XOPT058
• Frequency Resolution: 1 Hz
• Frequency Accuracy: ±1 count
• Time Base: 0.01 ppm OCXO with external reference input support
• Phase Noise: -110 dBc/Hz at 10 kHz offset
RF Signal Generator
• Output Level Range (T/R Port): -130.0 dBm to -30.0 dBm (CW/FM); -35 dBm max (AM); -40 dBm max (complex modulation)
• Output Level Range (Duplex): -130.0 dBm to +10.0 dBm (CW/FM); +5 dBm max (AM); 0 dBm max (complex modulation)
• Output Level Resolution: 0.1 dB
• Output Level Accuracy: ±1.0 dB (>-110 dBm); ±1.5 dB (≤-110 dBm)
RF Analyzer & Spectrum Analysis
• Displayed Average Noise Level (DANL): -140 dBm (typical)
• RBW (pre-amp enabled): 300 Hz
• Measurement Range: -130 dBm to 125 W
• Direct Input Power: 50 W continuous, 125 W cyclical
• Spectrum Analysis Range: 1 MHz to 1 GHz standard; up to 2.7 GHz with extension option
• Markers: 8 available
Audio Capabilities
• Audio Generator Output: 1 mV to 8 V rms
• Audio Generator Frequency Range: 20 Hz to 40 kHz at 0.1 Hz resolution
• AF Counter Range: 20 Hz to 20 kHz
• AF Measurements: Level, frequency, SINAD, and distortion
• Audio Generator Level Accuracy: ±1% of setting
Additional Instruments
• Dual-Channel Oscilloscope: Up to 4 MHz
• Digital Multimeter: AC/DC volts, AC/DC amps, ohms
Power & Interfaces
• AC Supply: 100–120 VAC @ 60 Hz or 220–240 VAC @ 50 Hz (±10%)
• Power Consumption: 120 W nominal, 200 W maximum
• Standard Interfaces: GPIB, Ethernet, USB
– Key Features
• High-resolution 1 Hz frequency tuning with ±1 count accuracy
• Dual-port RF generation with independent level control
• Wide dynamic range: -130 dBm to 125 W measurement capability
• Scalable frequency coverage to 2.7 GHz
• Integrated audio analysis with SINAD and distortion measurement
– Typical Applications
• Radio receiver sensitivity and selectivity testing
• Transmitter power and modulation verification
• Field service and maintenance of analog/digital radio systems
• Production acceptance testing
• Spectrum monitoring and interference analysis
– Compatibility & Integration
Standard GPIB, Ethernet, and USB interfaces enable integration with automated test systems and remote operation. External frequency reference input allows synchronization with master clock standards.
