Keysight N9915AU-210 Base N9915A combination analyzer includes a cable and antenna analyzer. Option 210 adds:brbrA vector network analyzer mode with transmission/reflection or S21 and S11 measurements, both magnitude and phase. Available calibrations are CalReady, one-port OSL, response and enhanced response.brbrInsertion loss measurement to the base cable and antenna analyzer or CAT mode.brbr2-port transmission measurement to the vector voltmeter mode, available as Option 308.brbrTracking capability to the spectrum analyzer independent source, available as Option 233 (source and spectrum analyzer set to sweep a frequency range, in sync)brbr*This is the field-upgrade version. For factory-installed options, please see a sales representative for a customized unit.