Anritsu S820D – Site Master Broadband Cable & Antenna Analyzer

The Anritsu S820D Site Master is a broadband cable and antenna analyzer engineered for field technicians and RF engineers requiring portable, accurate characterization of transmission line and antenna systems. It delivers critical measurements

VSWR, cable loss, distance-to-fault, and return loss - across 2 MHz to 20 GHz, enabling rapid fault location and system validation in demanding field environments.

Technical Specifications Frequency coverage spans 2 MHz to 20 GHz with 10 kHz resolution and ±3 ppm accuracy in CW mode. Return loss measurement range extends from 0.00 to 60.00 dB, while VSWR measurements reach 1.00 to 65.53. The instrument supports three data point densities: 130, 259, and 517 points per sweep. Measurement speed for return loss, SWR, and distance-to-fault (DTF) reaches ≤2 seconds per 517-point sweep with CW enabled, or ≤4 seconds with CW disabled. An optional power monitor function increases speed by 4× versus prior models and enables absolute power measurements (dBm or mW) with enhanced resolution in high insertion-loss scenarios. Directivity (insertion loss accuracy) after calibration achieves ≥42 dB for frequencies below 5 GHz, ≥36 dB below 15 GHz, and ≥32 dB above 15 GHz. Output power remains <0 dBm. Immunity to interfering signals is rated +13 dBm on-channel and -10 dBm on-frequency.

Key Features

Distance-to-fault calculation with real-time fault location resolution across 517 data points

2-port cable loss measurements via external CW source, suitable for long cable assemblies to 20 GHz

Vector error correction for measurement repeatability in challenging RF environments

User-defined calibration kits: two coaxial and two waveguide configurations

Trace smoothing to enhance cable loss measurement fidelity

Internal memory: 21 complete measurement settings and 200 timestamped data traces

640×480 color TFT display with adjustable brightness and sunlight visibility

Dedicated PC software (Anritsu Handheld Software Tools) for trace archival, unlimited storage (PC-limited), and overlay comparison of up to ten traces

Typical Applications Site commissioning and acceptance testing of antenna systems, transmission line fault diagnosis, VSWR and return loss characterization, and maintenance verification of wireless infrastructure.

Compatibility & Integration Supports user-defined calibration kits with both coaxial and waveguide standards. PC integration via Anritsu Handheld Software Tools for data transfer, analysis, and long-term archiving.