Operation
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pv106ug r1
Time domain transmission
Time domain transmission (TDT) is similar to the TDR technique except that the transmitted signal is
observed. Traditionally, this is accomplished using a step source and a sampling scope, as with the TDR, but
the transmitted signal at the output of the network is observed rather than the reflected signal at the input to
the network. This technique is useful for measuring the step response or rise time of amplifiers, filters and
other networks.
Examples:
Expected responses from simple RC networks
Measured TDT for 100pF series capacitor
Measured TDT for 100pF shunt capacitor
6.3.6
Reverse measurements on two port devices
In order to measure the reverse parameters (S
12
and S
22
), it is necessary to complete a 12-term calibration
first (select ‘insertable’ or ‘non-insertable’ DUT on calibration window as shown in
Display setup
). The other
calibration options measure only forward parameters. After the 12-term calibration is completed, simply
select the reverse parameter(s) to be required on any displayed channel and start the measurement.
