1HIGH FREQUENCY MEASUREMENT ACCURACY Vector network analyzer use 0.5ppm TCXO to guarantee high frequency measurement accuracy 2SWR LESS THAN 03 High performance calibration kit can guarantee that the calibration SWR is less than 03 when up to 3GHz 3PROTECT ACCURATE CIRCUIT AND INTERFACE Complete metal shell can totally protect the internal accurate circuit while considering the protection of the external interface 4VERY STABLE This device will not load the initial calibration data at startup, and will not automatically interpolate the calibration data after the user changes the frequency, and must recalibrate or come back to the calibration data after each startup and frequency change 5COMPATIBLE WITH SYSTEMS VNA-QT software compatible systems include for Linux, for Windows(7+), for OS X planned