Technical data

396 Chapter 14
Return Loss
Measuring Return Loss
Return Loss
Setting Average, Sweep, and Restart
Setting the Sweep
You can select either continuous or single sweep. Continuous sweep provides
repeated, ongoing measurements. Single sweep performs a single measurement that
is repeated only when you push the Single button.
To set sweep:
Setting Averaging
You can choose to have averaging on or off and set the number of averages you want
to take. Averaging only applies to the data, not the trace. You can select from the
following types of averaging:
• Off: Disables averaging.
• Running Average: Computes the new result as the weighted sum of the last
result and the new measurement. The last result is weighted by (n – 1)/n. The
new result is weighted by 1/n. Each new measurement produces a new result.
• Max Hold: Is not an average, but on a point by point basis, displays the
maximum amplitude for the given frequency or channel since Max Hold was
turned on. It is updated when a new maximum occurs.
• Group Average: Makes the requested number of measurements, averages the
measurement data, and displays the average as a single result trace.
Measurement time will vary based on the requested number of averages and can
take minutes for very large number of averages.
• Group Max Average: Makes the requested number of measurements before
returning a single trace result. This trace is the maximum value seen at each
trace point over the requested number of averages (measurements).
Step Notes
1 [Average/Sweep]
2 [Continuous] or [Single] Press the menu key to select the
sweep mode you require.