Making Reflection Response Measurements - Agilent Technologies 8719ES 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
Refl: FWD S11 (A/R)
Meas
Start 50 M/µ
Stop 3 G/n
2. Perform an S 1-port correction on PORT 1. Refer to
11
Measurement Results"
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.
or on ET models:
for a detailed procedure.
Making Time Domain Measurements
Making Reflection Response Measurements
TRANSMISSN
Chapter 5 , "Optimizing
Figure 3-7.
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