Atec Agilent-N9923A - Manual (Page 11)

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Vector Voltmeter (option 308)
With vector voltmeter mode, you can characterize the difference between two
measurements easily. The zeroing function allows you to create a reference
signal, and characterize the difference between two device measurements.
‡ 1-port cable trimming - reflection or S11 measurement, magnitude and phase
‡ 2-port transmission - transmission or S21 measurement, magnitude and phase
‡ A/B and B/A - ratio of two receivers or channels, magnitude and phase –
Need an external signal generator for the A/B or B/A measurement (must
order option 122).
The results are shown on a large display in digital format. Refer to the network
analyzer section for magnitude and phase accuracy information.
Using time domain, data from transmission or reflection measurements in the
frequency domain are converted to the time domain. The time-domain response
shows the measured parameter value versus time.
Time stimulus modes
‡ Low-pass step
This stimulus, similar to a traditional time domain reflectometer (TDR)
stimulus waveform, is used to measure low-pass devices. The frequency-
domain data should extend from DC (extrapolated value) to a higher value.
‡ Low-pass impulse
This stimulus is also used to measure low-pass devices.
‡ Bandpass impulse
The bandpass impulse stimulates a pulsed RF signal and is used to
measure the time-domain response of band-limited devices.
Windows
The windowing function can be used to filter the frequency-domain data and
thereby reduce overshoot and ringing in the time-domain response.
Gating
The gating function can be used to selectively remove reflection or transmission
time-domain responses. In converting back to the frequency domain the effects
of the responses outside the gate are removed.
Time domain (Option 010)