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Anritsu S331L Site Master

Site Master™ Handheld Cable & Antenna Analyser S331L


The Site Master Anritsu S331L is an all inclusive 1-port cable and antenna analyser covering the 2 MHz to 4 GHz range, with a built-in InstaCal module and a built-in power meter. Standard measurements include:

  • Return Loss
  • VSWR
  • Cable Loss
  • Distance-to-Fault Return Loss
  • Distance-to-Fault VSWR
  • RF Power (50 MHz to 4 GHz)

The Anritsu S331L is the highest value in a rugged, handheld cable and antenna analyser. The S331L replaces the current value line S331D which is part of the longest running portable cable and antenna analyser family in history. Utilising the latest advancements in technology, the S331L has been optimised for field conditions, is easy to use, and has efficient sweep management capabilities. The S331L delivers an entire workday of battery operating time, the most ever offered in a handheld cable and antenna analyser. With its large outdoor viewable 7” TFT touch screen display, new intuitive GUI, and classic mode that mimic the S331D basic measurement flow, the S331L is very easy to use, and can significantly increase a user’s efficiency in the field.

The Anritsu S331L is for contractors, installers, and wireless service providers, who need an instrument to reduce per site maintenance expenses. Anyone who needs to make basic cable/antenna and power measurements will benefit from the new S331L Site Master. The simple no option configuration and high value pricing make the S331L ideal for tower contractors and can be easily provisioned by stocking distributors and rental companies alike.

For contractors who don’t have time to look for nearby power sources, the Anritsu S331L will last an entire workday on a single battery charge, meaning you can be a lot more productive with your day. Not only does the Site Master Anritsu S331L run longer, it also has a lot more memory internally so you don’t have to worry about running out of space for all of those extra measurements you just made. Your CAPEX affects your profitability, and your stability. The new Anritsu S331L is the best value in a handheld cable and antenna analyser period. You can get more done with minimal negative impact on your operating expenses.


  • 2 MHz to 4 GHz Handheld Cable and Antenna Analyser, impact, dust, and splash resistant
  • More than 8 hours of continuous battery operation
  • Standard built-in InstaCal™ module and Power Meter
  • FlexCal™ maintains calibration with frequency changes
  • Familiar S331D-like Classic Mode and S331E-like Advanced Mode
  • Built-in one button Help function
  • 800x480 7” TFT touch screen display and multiple USB ports
  • Internally store >1000 files with fast preview of stored traces
  • Industry standard *.dat format compatible with Line Sweep Tools (LST) and HHST
  • New! SweepMasters DIRECT online trace delivery service


1-port RF Cable and Antenna testing 2 MHz to 4 GHz such as:
  • Cellular
  • Public Safety
  • Radio and TV broadcasting
  • Aerospace and defense
Measurements include:
  • Return Loss
  • VSWR
  • Cable Loss
  • Distance-to-Fault Return Loss
  • Distance-to-Fault VSWR
  • RF Power (50 MHz to 4 GHz)


The S331L is an all-inclusive instrument with a built-in InstaCal™/Power Meter module. The S331L arrives fully capable of measuring:
  • VSWR
  • Return Loss
  • Cable Loss
  • Distance-To-Fault VSWR
  • Distance-To-Fault Return Loss
  • RF Power
No options are required to perform these measurements, however a test port cable is required to complete calibration(s). Please be sure to refer to the brochure or datasheet for additional accessories such as a phase stable test port cable or hard transit case to complement your S331L.  


Find out more information about the Anritsu S331L Site Master here


Application Note
Distance To Fault Application Note Evaluation of RF Network Testing Application Note FlexCal Broadband Calibration and Measurement Application Note Insertion Loss Measurement Methods Application Note