1 Introduction16 Keysight J7201A/B/C Operating and Service ManualKey FeaturesThe J7201A/B/C attenuation control units are standalone portable instruments that offer a user-defined attenuation sweep function. This feature allows setting of desired attenuation range, stepsize, number of cycles and attenuation configuration based on user application’s requirements.J7201A/B/C are designed in a way which make them suitable for benchtop and ATE testing forapplications such as base station transceivers (BTS) test, WLAN, WIMAX™, MIMO and WCDMA.Exceptional insertion loss repeatability and excellent attenuation accuracy and flatness over 5million cycles operating life ensure precise measurements and reduce calibration intervalsreducing cost of test.The features and functions of attenuation control units are easily accessible via front panel usingsoft keys and the rotary knob. J7201A/B/C are LXI Class C compliant instruments which providesGPIB, USB and LAN connectivity for easy remote control and triggering through a full- featuredgraphical web interface. This attenuation control units also allow relative attenuation to any valuesby selecting relative attenuation step function. Calibration data is stored in the instrument’smemory for fast, simple and easy retrieval.Table 1-1 Key featuresKey featuresAutomated corrected valueAttenuation sweep functionGPIB, USB, LAN (LXI Class C)Relative attenuation step functionKeypads & rotary knobCalibration data storage