3575A Agilent Meter
The Keysight Agilent HP 3575A is capable of many applications, measure gain and phase response of feedback systems, envelope delay and return loss of transmission lines, complex impedance of components, and insertion loss of mixers and frequency doublers.
The Keysight Agilent HP 3575A can solve network analysis problems in the 1 Hz to 13 MHz frequency range where complex measurements (gain or phase or both) are required.
Measure amplitude over an 80 dB dynamic range, 100 dB measurement range. The phase of two signals is indicated over a range of ±192° with 0.1° resolution! Input signal range is 200 µV RMS to 20 V RMS.