HP 86140A Series User Manual page 72

Using the Optical Spectrum Analyzer
The Markers Menus
Bandwidth Marker Interpolation
Turns the bandwidth marker interpolation
, the bandwidth markers will be placed at the exact number of dB (NDB)
ON
from the normal marker if within the trace range. The position of the marker
will be linearly interpolated between two trace data points. The default state is
. If interpolate is
ON OFF
be at values closest to and more negative than the NDB value. For positive
NDB values, the bandwidth markers will be at values closest to and more posi-
tive than the NDB values. This will typically result in a wider bandwidth mea-
surement.
Peak Excursion
Sets the peak excursion value for the marker search routines.
The peak excursion value is used to determine whether or not a local maxi-
mum in the trace is to be considered a peak. To qualify as a peak, both sides of
the local maximum must fall by at least the peak excursion value.
Pit Excursion
Sets the pit excursion value for the marker search routines.
Pit excursion criteria
The pit excursion value is used to determine whether or not a local minimum
in the trace is to be considered a pit. To qualify as a pit, both sides of the local
minimum must rise by at least the pit excursion value.
3-32
ON
, for negative NDB values, the bandwidth markers will
Peak excursion criteria
or . When interpolation is
OFF