Agilent Technologies E4406A, User Manual

Page: 104 / 230

104 Chapter 4
Making Measurements
Making the Waveform (Time Domain) Measurement
NOTE
In the Waveform measurement, the
Mean Pwr (Entire Trace)
value
plus the
Pk-to-Mean
value will sum to equal the current
Max Pt.
value
as shown in the data window below the RF Envelope display. If you do a
marker peak search (
Search
) with averaging turned off, the marker will
find the same maximum point. However, if you turn averaging on, the
Pk-to-Mean
value will use the highest peak found for any acquisition
during averaging, while the marker peak will look for the peak of the
display, which is the result of n-averages. This will usually result in
differing values for the maximum point.
Band Power
A band power measurement using the markers calculates the average
power between two adjustable markers. To make a band power
measurement:
Press the
Marker
key.
Press Function,
Band Power
.
Two marker lines are activated at the extreme left side of the
horizontal scale. Press
Normal
and move marker 1 to the desired
place by rotating the
RPG
knob.
Press
Delta
to bring marker 2 to the same place as marker 1.
Move marker 1 to the other desired position by rotating the
RPG
knob. Band power measures the average power between the two
markers. When the band power markers are active, the results are
shown in the results window as Mean Pwr (Between Mks). When the
band power function is off the results window reads Mean Pwr
(Entire Trace).
Troubleshooting Hints
Changes made by the user to advanced waveform settings can
inadvertently result in measurements that are invalid and cause error
messages to appear. Care needs to be taken when using advanced
features.