Loading ...
Loading ...
Loading ...
129 SNA5000A Vector Network Analyzer User Manual
5.6.8 Trace Setup Coupling
To switch on or off the time domain or marker coupling, click the Time domain or
Marker checkbox in the Coupling box in the Trace Control bar of the TDR/TDT tab.
5.6.9 Time Domain Gating
The time-domain gating function transforms the time domain response into the
frequency domain after removing a part of the response. Usually, the function is used to
simulate the expected frequency domain response after removing some faults by removing
the abnormal responses resulting from the impedance discontinuities. The operation
procedure includes enabling the time domain transformation, setting the parameter to
remove partial time-domain responses, observing the other traces in the frequency domain
whose gating settings are coupled with the trace, or close the time domain transformation to
observe the frequency responses.
The time-domain gating settings in the TDR option can be changed in the Gating bar of
the TDR/TDT tab.
To switch on or off the time domain gating function, click the Gating checkbox.
To change the function type of the gating range, click the ratio button in the Type box.
The option Notch means that the responses in the gating range will be ignored, while the
option Bandpass means that the responses beyond the gating range will be ignored.
The scroll-wheel and textbox can be used to change the start and stop position of the
time domain gating range.
5.7 TDR Data Analysis & Output
The general marker search function is available in the TDR option for data analysis, and
there are some shortcuts provided at the top of TDR toolbar for marker management and
search for maximum/minimum with tracking. In addition, the functions of the rise time search
and delta time search are introduced as the time domain trace data analysis tools in the TDR
option.
To correct the errors of impedance calculation resulting from the complicated distribution
of mismatches in the DUT, a peeling algorithm is introduced to reveal the actual impedance
value of every point on the passive DUTs.
The shortcuts to save/recall the state files, output the trace data to the files, and save the
screenshot are provided in the File pull-down menu at the top of the TDR toolbar.
5.7.1 Marker Setup
In addition to the general ways to manage the markers in the VNA, the Marker pull-down
menu at the top of the TDR toolbar is a way to add or delete markers.
The order in the first group of the Marker Search pull-down menu is shortcuts to
manage the common marker tracking marker. The option Off closes the search function of
the current marker, while the Max or Min starts the tracking search for maximum or
minimum.
Loading ...
Loading ...
Loading ...