The Marconi IFR Aeroflex 2948 is a Communications Service Monitor that combines a spectrum analyzer, RF signal generator, modulation analyzer, and power measurement instrument into a single platform. Built for field technicians and design engineers, it delivers low phase-noise signal generation essential for accurate FM receiver noise characterization in narrow-band systems. The 2948 handles both analog and digital radio testing, cellular and wireless networks, and avionics applications with integrated audio analysis and real-time spectrum observation.
Technical Specifications
-# RF Signal Generation
• Frequency Range: 400 kHz to 1.05 GHz
• Output Power: +5 dBm (+7 dBm overrange)
• Level Accuracy: ±2 dB at all levels above −127 dBm
• Phase Noise: Low phase noise standard
-# Spectrum Analysis
• Frequency Range: 400 kHz to 1.05 GHz
• Dynamic Span: 100 Hz/division to 100 MHz/division
• Tracking Generator: Included standard
• Harmonic Analysis: Automatic harmonic checking
• Transient Analysis: Supported
• Real-time spectrum observation with offset facility for frequency translation
-# Modulation Analysis
• AM Range: 0 to 99% (manual tuning), ±5% ±1 digit accuracy at 1 kHz
• AM Resolution: 1%
• FM Range: 10 Hz to 15 kHz, ±5% ±resolution accuracy at 1 kHz
• FM Resolution: 10 Hz below 2 kHz deviation
• Demodulation Distortion: <2% at 1 kHz and 5 kHz FM (CCITT weighted)
• Supported Modulation Types: AM, FM, PM, FSK, PSK, ASK
• Modulation Bandwidth: 20 Hz to 1 MHz
• Demodulation Output: 200 mV peak-to-peak ±10% per 1 kHz deviation
-# Power Measurement
• Range: 5 mW to 150 W (N-Type connector)
• Accuracy: Better than 10% down to 5 mW
-# Audio Functions
• Dual audio generators for internal modulation
• Lowpass filters: 300 Hz, 3 kHz, 15 kHz
• Audio analysis: Frequency metering, distortion metering, signal-to-noise metering, oscilloscope display, bar charts
– Key Features
• Low phase-noise signal generation for precision FM receiver testing
• Integrated tracking generator for component and system characterization
• Automatic harmonic detection and transient analysis
• Direct power measurement to 150 W without external attenuators
• PCMCIA memory card interface for data logging
– Typical Applications
• FM receiver noise figure and deviation measurements
• Analog and digital radio system commissioning and maintenance
• Cellular and wireless network field testing
• Avionics communications system verification
• Transmitter harmonic and distortion analysis
– Compatibility & Integration
Standard RF IN/OUT connectors support rapid integration into test benches and field service configurations.
