The Wiltron S331 is a portable, handheld cable and antenna analyzer for RF transmission line and antenna system installation and maintenance. It measures VSWR, return loss, insertion loss, and cable loss while providing distance-to-fault (DTF) capability to pinpoint faulty RF components. A synthesized signal source and LCD display deliver real-time graphical measurement feedback in the field.
Technical Specifications
Frequency Performance
• Operating Range: 25 MHz to 3300 MHz
• Frequency Accuracy: 75 ppm
• Frequency Resolution: 100 kHz
Measurement Capabilities
• Return Loss/VSWR Range: 1.00 to 65.00
• Return Loss Resolution: 0.1 dB
• Dynamic Range: 54 dB
• Directivity (Standard Calibration): 35 dB
• Directivity (Precision Calibration): 42 dB
• Fault Location Resolution: 0.8% of maximum range (nominal)
RF Performance
• Test Port: Type N, 50 Ω (75 Ω with adapter)
• Power Output (600–1200 MHz): +9 dBm nominal
• Power Output (300–600 MHz): >+2 dBm nominal
• Interfering Signal Immunity (Typical): +10 dBm
• Maximum Input: +22 dBm
• Maximum DC Voltage: ±50 VDC
Power & Battery
• Internal Battery: Up to 2 hours continuous operation; extended battery life features support 8-hour work days
• External Power: 12.5 VDC (also charges internal battery)
• Charging Input Range: 12.5 to 15 VDC @ 600 mA
– Key Features
• VSWR and return loss measurement (50 Ω / 75 Ω)
• One-port cable loss measurement
• Distance-to-fault (DTF) for return loss and VSWR
• Smith chart display (Advanced Mode)
• 1-port phase measurement (Advanced Mode)
• Transmission measurement with external sensor (Advanced Mode)
• Large LCD display with backlight for low-light operation
• Rugged field-ready construction
• RS232 serial interface for PC data transfer and trace archival
– Typical Applications
• RF transmission line installation and commissioning
• Antenna system tuning and troubleshooting
• Cable fault location and characterization
• Field verification of component performance
• Maintenance and periodic system testing
– Compatibility & Integration
RS232 interface enables data export to PC for printing, archiving, and trace comparison. Null-modem serial cable typically supplied. Type N connector (male) on 50 Ω test port accommodates standard RF cabling and adapters.
