124 Chapter 2
Front-Panel Key Reference
Marker
Note that the data values averaged will not always be
symmetrical with respect to the marker position. If the
marker is positioned within 2.5% of the beginning of
the trace (one-quarter division), the trace data values
in the first half-division will be averaged. Similarly, if
the marker is positioned within 2.5% of the end of the
trace, the trace data values in the last half-division will
be averaged.
NOTE Do not use Marker Noise to evaluate the displayed average noise level
of the analyzer relative to the specification. Read the displayed average
noise level directly from the display or use the normal marker. Refer to
Application Note 150 for a discussion of how noise is displayed on a
spectrum analyzer.
To guarantee accurate data for noise-like signals, a
correction for equivalent noise bandwidth for each
resolution bandwidth is measured and included in the
measurement. The Marker Noise function accuracy is
optimal when the detector is set either to Average or to
Sample because neither of these detectors peak-biases
the noise.
Key Access:
Marker, More, Function
Off
Turns off the active function markers.
Key Access:
Marker, More, Function
Marker Table
On Off
Compresses the graticule and displays marker information in a table.
The information includes the marker number, trace number, marker
type, X axis value, and the amplitude.
Key Access:
Marker, More
Marker All Off
Turns off all of the markers, including markers used for signal track
and demodulation. Marker annotation is also removed.
Key Access:
Marker, More
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