Quick Start: Learning How to Make Measurements
Learning to Make Reflection Measurements
6. Press SAVE STATE to complete the process.
Step 3. Measure the device
Measuring Return Loss.
1.Connect your device to PORT 1 or the REFLECTION port.
2.Press 
Scale Ref
AUTO SCALE to reposition the trace.
3.Press 
Marker
to read the return loss from the analyzer display as shown in Figure
The device response indicates that the filter and the analyzer impedances are better matched within the frequency range of the filter passband than outside the 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 Measurement of Return Loss
Chapter 2 |