Keysight Technologies N9321C, User Manual

Page: 162 / 220

Key Reference
Peak Search
154
Peak Criteria
Accesses the submenu to set the criteria for peak search.
Key access:
Peak Search > More
Peak Excursion Sets the minimum amplitude variation of signals
that the marker identifies as a peak. If a value of 10
dB is selected, the marker moves only to peaks that
rise and fall more than 10 dB above the peak
threshold value. When the peak excursion is 6 dB or
higher,
NOTE
Two signal peaks, which are so close together that the amplitude drop
between them is less than the peak-excursion value, are not recognized as
two peaks. A signal peak is recognized only if it has a peak excursion drop
above the noise floor, on both sides of the signal.
the marker-peak does not recognize signals less
than peak-excursion value above the noise floor. To
correct this, when measuring signals near the noise
floor, reduce the excursion value. To prevent the
marker from identifying noise as signals, reduce the
noise floor variance less than the peak-excursion
value by reducing the video bandwidth or by using
video averaging.
Key access:
Peak Search > More
Peak
Threshold
Sets the minimum amplitude that the marker can
identify as a peak. For example, if set to –90 dBm,
the marker moves only to peaks that rise and fall
more than the peak excursion above –90 dBm. Only
functional when in Excursion and Threshold marker
mode.
Key access:
Peak Search > More
Peak Type Toggles the peak type between maximum value and
minimum value.
Key access:
Peak Search > More