HIGH FREQUENCY CIRCUIT ANALYSER

摘要

The measuring of the response of an electronic device (or DUT) to a high frequency input signal is described. A microwave transition analyser (MTA) (10) having two inputs (11a, 11b) measures via signal paths and via ports (3, 4) two high frequency independent waveforms from first and second ports of the DUT. The measured waves are processed, with the use of calibration data, to compensate for the influence of the measurement system on the waves between the ports of the device and the input ports of the MTA (10). The absolute values of the magnitude and phase of waveforms at the DUT are ascertained. The signal source to which an input of the MTA is connected is switched by switches SC, SD, whilst using the signal at a different input of the MTA (10) to maintain a time reference.