Antenna parameter measuring apparatus; Calibration blocks for calibrating devices having antenna and/or antenna array; Calibration devices for calibrating devices having antenna and/or antenna array; Computer-controlled apparatus for testing and measuring RF signals; Electronic test and measurement devices for use in the fields of networks and telecommunications, namely, instrumentation used to test and certify new and existing data and voice communication cable and coaxial cable; Electronic testing equipment, namely, telecommunication line integrity testing apparatus
Electrical and Scientific Apparatus