The HP Keysight (formerly Agilent) 8753E is a used vector network analyzer that provides magnitude and phase information, and can make group delay and time domain measurements as well.
The Keysight (formerly Agilent) HP 8753E's processor makes measurements and data transfers up to seven times faster than HP 8753D's or HP 8753C's.
Overall throughput is enhanced by several new features such as simultaneous four-parameter displays and adapter-removal calibration.