Making Reflection Response Measurements - Agilent Technologies 8753ET User Manual

Making Reflection Response Measurements

The time domain response of a reflection measurement is often compared with the time domain
reflectometry (TDR) measurements. Like the TDR, the analyzer measures the size of the reflections versus
time (or distance). Unlike the TDR, the time domain capability of the analyzer allows you to choose the
frequency range over which you would like to make the measurement.
1. To choose the measurement parameters, press:
Preset
Meas Refl: FWD S11 (A/R)
Start 50 M/
Stop 3 G/n
2. Perform an S 1-port correction on PORT 1. Refer to
11
detailed procedure.
3. Connect your device under test as shown in
Figure 3-7 Device Connections for Reflection Time Domain Example Measurement
4. To better view the measurement trace, press:
Scale Ref AUTO SCALE
Figure 3-8 shows the frequency domain reflection response of the cables under test. The complex ripple
pattern is caused by reflections from the adapters interacting with each other. By transforming this data
to the time domain, you can determine the magnitude of the reflections versus distance along the cable.
Making Reflection Response Measurements
or on ET models:
TRANSMISSN
Chapter 5 , "Optimizing Measurement Results"
Figure 3-7.
Making Time Domain Measurements
for a
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