Pulse source and TDR/TDT analysis (options R&S RTO6-B7/K130)
R&S
®
RT
O6
1047User Manual 1801.6687.02 ─ 05
Typical use cases are:
●
Locate faults in a circuit
●
Measure impedance
●
Measure step response of a DUT
16.2.1 About TDR/TDT measurements
Using TDR/TDT measurements, you can analyze the reflections and transmission
characteristics of a DUT
. With TDR, it is possible to determine the type, magnitude and
location of a fault. TDT delivers information on stability
, losses and bandwidth of the
DUT.
The signal source is the pulse source, and the oscilloscope measures the reflected and
transmitted signals.
Requirements
TDR/TDT analysis requires the pulse source option R&S RTO6-B7.
Cabling requirements:
●
Use only high-quality double-shielded RF cables. Two suitable cables are delivered
with the pulse source option R&S RTO6-B7.
●
Use low loss cables with frequency range that fits the oscilloscope bandwidth.
●
Consider the recommended cable length: 0.5 m < length < 3 m.
Calibration standards
During calibration, you measure the connecting cables of the measurement setup
against standards. Calibration standards assumed to be ideal.
●
Short with RF quality: a standard short is delivered with the pulse source option
R&S RTO6-B7. You can use other shorts with electrical length 0 ns … 2 ns. Default
value is the R&S RTO6-B7 short.
●
Open (DC)
●
Match (DC): a standard 50 Ω match is delivered with the pulse source option
R&S RTO6-B7.
You can use another match with 50 Ω±10%.
●
Through (RF): the length is assumed to be zero.
Calibration results
After successful calibration, the frequency response of the short and through measure-
ments are displayed. Steep dips in the graph indicate high attenuation within your
desired bandwidth, which impairs the performance. To improve the measurement,
reduce the bandwidth of the system. To check the impact of the frequency response
calibration on the time domain waveform, you can disable the usage ("Use frequency
response calibration"). Without frequency response correction, only the rescaling to the
TDR/TDT measurements is performed.
TDR/TDT analysis (option R&S R
T
O6-K130)
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