Site Master S810C covering 3.3 to 10.0 GHz, and S820C covering 3.3 - 20.0 GHz, are the most accurate, reliable and convenient one port microwave transmission line and antenna analyzers available for installation, verification, troubleshooting, and repair of microwave communication systems. Measurement capability includes tune mode, return loss, SWR, cable loss, and distance-to-fault (DTF) analysis. Tune mode is a fast sweep mode that quickly tunes the waveguide by adjusting the flange connectors quickly at both ends of the wave guide. Patented RF interference rejection enables accurate measurements in the presence of high RF activity. Data Analysis software enables assessment of system trends, problems, and performance in addition to professional report generation. An optional power meter is available to make power measurements quickly and easily. Microwave Site Master S810C and S820C utilizes vector error correction solving the most common and the most difficult accuracy problems of field test equipment operation and thus, improves system quality and reduces maintenance expenses. Difficult test specifications are easy to verify. Vector error correction and a simple, friendly user interface within the S810C and S820C further improves the quality and convenience of measurements compared to traditional scalar techniques. Vector error correction also improves the quality of Distance-To-Fault data. Not only is the reflection magnitude more accurate, the waveguide dispersion correction for fault distance (different frequencies travel at different speeds) is also more accurate and repeatable.