Pulse source and TDR/TDT analysis (option R&S RTP-B7/K130)
R&S
®
RTP
1001User Manual 1337.9952.02 ─ 12
Domain, ε_r
Sets the domain of the x-axis: time or distance (in m or inch). If you select distance,
enter also the permittivity "ε_r" of the used DUT.
Remote command:
TDRT:DOMain on page 2246
TDRT:PERMittivity on page 2247
State
Select the TDR/TDT signals to be displayed and analyzed.
TDR delivers the impedance Z and the reflection coefficient ρ.
TDT delivers the normalized and corrected step response.
Remote command:
TDRT:SIGNal<m>STATe on page 2247
Vertical scale
Set the vertical scale of the TDR/TDT signals.
Remote command:
TDRT:SIGNal<m>:SCALe on page 2247
Offset
Set the offset of the TDR/TDT signals.
To set the position, assign position to the vertical Position knob ("File" menu > "Front-
panel Setup" > "Knobs"). Turn the vertical Position knob to change the position.
Remote command:
TDRT:SIGNal<m>:OFFSet on page 2248
TDRT:SIGNal<m>:POSition on page 2248
16.2.6 Measurement results
To get exact measurement results, set the horizontal time scale so that the complete
DUT is captured and visible on the screen. Thus, interference between the reflected
signals from the DUT is avoided. Interference can occur because the repetition rate of
the pulse source is linked to the horizontal scale to maximize measurement speed.
The results of the TDR measurements are the impedance waveform Z and the wave-
form of the reflection coefficient ρ.
To investigate details of the waveforms, use the zoom function. For further analysis,
you can use automatic and cursor measurements, histogram, mathematics and refer-
ence waveforms.
Data export
In the same way as channel waveforms, you can export the data of Z, ρ and H wave-
forms to file (one waveform per file). Raw data is not available.
See also: Chapter 12.2, "Save and recall waveform data and results", on page 480.
TDR/TDT analysis (option R&S
RTP-K130)
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