Step 3. Measure The Device - HP 8753E Installation And Quick Start Manual

Quick Start: Learning How to Make Measurements
Learning to Make Reflection Measurements
6. Press to complete the process.
SAVE STATE

Step 3. Measure the device

Measuring Return Loss.
1. Connect your device to PORT 1.
2. Terminate any unused port on your device. You can do this by either connecting a load
to the device's unused port, or by connecting the device's unused port to PORT 2 on the
HP 8753E.
3. Press ,
Scale Ref AUTO SCALE
4. Press to read the return loss from the analyzer display as shown in
Marker
The device response indicates that the filter and the analyzer impedances are well
matched within the frequency range of the filter passband. That is, the reflected signal
is smaller within the filter passband than outside the passband.
In terms of return loss, the value within the passband is larger than outside the
passband. A large value for return loss corresponds to a small reflected signal just as a
large value for insertion loss corresponds to a small transmitted signal.
Figure 2-10 Example Return Loss Measurement Trace
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to reposition the trace.
Figure 2-10.
Chapter 2