The FieldFox RF Analyzer is the world's most integrated handheld instrument for cable, antenna testing and spectrum analysis. It combines seven functions in a 6 lb handheld analyzer. You can add any of the functions after the initial purchase via software licensing, without needing a hardware upgrade, complete flexibility to make your decision-making easier. Each instrument is CalReady at the RF Out port, immediately following power-on or preset. This means it's already calibrated and ready to make accurate measurements such as one-port cable loss, VSWR, return loss, and DTF measurements at the test port without the need to manually calibrate. The industry's first and only built-in calibration system allows you to calibrate the cable/antenna tester without carrying a calibration kit into the field. As with any test instrument, when you add an additional device to the test port, such as a jumper cable or attenuator, you need to calibrate using a calibration kit (cal kit). QuickCal eliminates the hassle of carrying and using a cal kit, plus provides worry-free accuracy and excellent repeatability every time.FieldFox has an optional built-in spectrum analyzer that covers frequency ranges from 5 kHz to 6 GHz. It provides a fast spectrum scan to detect interference and RF burst capture to measure intermittent signals. It displays four traces at the same time, and you can choose different detector modes.Standard accessories include AC/DC adapter, battery, soft carrying case, and user manual.