Anritsu S331D Site Master Cable and Antenna Analyzer

The Anritsu S331D Site Master is a handheld cable and antenna analyzer that covers 25 MHz to 4 GHz, delivering precise return-loss/SWR and cable-loss measurements for field work. It supports Distance-To-Fault (DTF) analysis via Frequency Domain Reflectometry to locate faults along the feedline, helping technicians quickly identify problem sections. The unit uses a 640x480 color TFT display and can be configured with a color display option for enhanced trace visualization, markers, and limit lines. In addition to standard measurements, it can operate on a field-replaceable battery for up to 1.5 hours of continuous use and accepts a 12.5 V DC supply, with built-in energy-conservation features to extend battery life. Available measurements include Return Loss/SWR and Cable Loss, with optional T1/E1 and Power Meter capabilities, while the Power Monitor and High-Accuracy Power Meter options (Options 5 and 19) expand testing versatility. Calibration options (Standard Calibration Option 098 and Premium Calibration Option 099) ensure measurement accuracy across the 25 MHz–4 GHz range. Designed for field technicians working with VHF, broadcasting, paging, cellular networks (PCS/GSM, 3G), ISM, WLAN, and WLL applications, the S331D enables robust cabling and antenna testing, channel power assessment, and fault isolation in a rugged handheld package. Note: this model has been discontinued and replaced by the S331L.