Overview; Overview Of Time Domain Measurement; Comparison To Time Domain Reflectometry (Tdr) Measurement - Agilent Technologies ENA Series User Manual

Analysis in Time Domain (Option 010)

Overview

Overview

Overview of time domain measurement

The E5070A/E5071A Option 010 provides the time domain function. The time domain
function is a function to mathematically transform waveforms in frequency domain that
can be measured with a general network analyzer to waveforms in time domain.
Figure 8-1 shows the waveforms in frequency domain and in time domain for the same
cable. The waveform in frequency domain shows ripples due to mismatches, but it is
difficult to estimate their locations. On the other hand, from the waveform in time domain,
you can find out the locations and magnitudes of mismatches.
Figure 8-1 Example of measurement in time domain and in frequency domain

Comparison to time domain reflectometry (TDR) measurement

The time domain function of the E5070A/E5071A is similar to the time domain
reflectometry (TDR) measurement in it displays the response in time domain.
In the TDR measurement, a pulse or step signal is inputted to the DUT and the change of
the reflected wave over time is measured.
On the other hand, the time domain function of the E5070A/E5071A changes the
frequency of the input signal to the DUT, performs measurement in frequency domain, and
transforms the result to the response in time domain using the inverse Fourier transform.
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