The Advantest TR4131 is a spectrum analyzer operating from 10 kHz to 3.5 GHz, delivering precise frequency, amplitude, and phase measurements across RF and microwave applications. This instrument combines wide dynamic range exceeding 100 dB with resolution bandwidth from 1 Hz to 3 MHz, enabling detailed signal characterization in telecommunications, EMC, and component testing environments. Advanced measurement capabilities include modulation analysis, occupied bandwidth measurement, quasi-peak detection conforming to CISPR standards, and field-strength measurement with antenna calibration compensation.
Technical Specifications
• Frequency Range: 10 kHz to 3.5 GHz
• Resolution Bandwidth: 1 Hz to 3 MHz
• Frequency Span: 50 kHz to 4 GHz
• Dynamic Range: >100 dB; 80 dB (tube surface); 70 dB
• Amplitude Accuracy: ±0.5 dB
• Marker Resolution: 0.05 dB
• Phase Noise: <−100 dBc/Hz @ 10 kHz offset
• Sweep Time: 1 ms to 1000 s (0.5 s/DIV)
• Input Impedance: 50 Ω
• Input Power Range: −20 dBm to +30 dBm
• Maximum Input Sensitivity: −116 dBm
• Skirt Characteristics: −80 dBc or better
• Display: Large color CRT, raster-scan, 640 × 480 pixels
• Operating Temperature: 0°C to 50°C (<85% RH)
• Weight: 10 kg
– Key Features
• Frequency, amplitude, and phase measurements with 0.05 dB marker resolution
• Power measurement and modulation analysis capabilities
• Peak search and automatic resolution bandwidth/sweep time optimization
• Automatic input attenuator control and frequency control (AFC) on B-type models
• Three non-volatile memory slots for settings and waveforms; max hold mode
• AM/FM audio monitor output for demodulation verification
• Digital memory supporting dual waveform display modes
– Measurement Functions
• Spectrum analysis with occupied bandwidth measurement
• Quasi-peak detector measurements (CISPR-compliant)
• Field-strength measurement with antenna factor compensation
• Frequency response analysis via marker functions
– Compatibility & Integration
• GPIB, USB, and Ethernet connectivity
• Video output and plotter operation support
• High-impedance probe connector for external measurements
• Pairs with TR4153B Tracking Generator (100 kHz to 2 GHz) for frequency response characterization
