User`s guide

64 N9320A Spectrum Analyzer
3 Functions and Measurements
Measuring Return Loss Using the Reflection Calibration Routine
This procedure uses the reflection calibration routine in the
proceeding procedure “Making a Reflection Calibration
Measurement” on page 62 to calculate the return loss of the
370 MHz low pass filter.
1 After calibrating the system with the above procedure,
reconnect the filter (DUT) in place of the short circuit used
for calibration. Do not change any of the analyzer settings or
the measurement setup may be invalidated.
2 Use the marker to read return loss. Position the marker with
the front- panel knob to read the return loss at that
frequency.
Rotate the knob to find the highest peak and the readout is
the maximum return loss. See Figure 24.
Figure 24 Measuring the Return Loss of the Filter