The Advantest R4131D is a spectrum analyzer engineered for precise signal characterization across 10 kHz to 3.5 GHz. Microcomputer control and integrated measurement functions streamline complex RF diagnostics in telecommunications, aerospace, electronics, and research environments. The instrument identifies signal properties, verifies transmitter performance, and isolates interference sources with 70 dB dynamic range and -116 dBm sensitivity.
Technical Specifications
Frequency & Bandwidth
• Frequency range: 10 kHz to 3.5 GHz
• Resolution bandwidth: 1 kHz to 1 MHz
• Video filter bandwidth: Selectable
• Frequency display accuracy: ±10 MHz
• Frequency stability: 100 kHz / 5 minutes
Amplitude Performance
• Dynamic range: 70 dB
• Maximum input sensitivity: -116 dBm
• Displayed average noise level: -116 dBm
• Skirt characteristics: -80 dBc or better
• Reference level: Independent adjustment
• Ordinate scale: Selectable dB/DIV
• Display units: dBm, dBµV, dBmV, or dBµV/m with automatic antenna calibration correction
Display & Memory
• 5.5-inch monochrome CRT
• Trace memory with peak, negative, and positive peak display modes
• Non-volatile storage for up to 3 measurement sets
• Auto-recall function at power-on
Input & Interface
• Input impedance: 50 Ohm
• RF attenuator: Available
• GPIB interface: Standard
– Key Features
• Marker resolution: 0.05 dB level data
• Peak search and signal tracking
• Quasi-peak measurement (CISPR-compliant)
• Occupied bandwidth measurement
• Field strength measurement with antenna compensation
• AM/FM demodulation
• Automatic and selectable sweep modes
• Zero and center frequency calibration
– Typical Applications
• Transmitter verification and spectral compliance
• Interference detection and diagnosis
• Signal characterization in RF system design
• EMC pre-compliance testing
• Communication system commissioning
– Compatibility & Integration
GPIB connectivity enables remote control and automated measurement sequencing within laboratory automation frameworks. Horizontal operation required. Minimum 10 cm clearance around ventilation openings. Weight: 10 kg.
