Keysight Technologies N9322C, Руководство пользователя, Страница: 123 / 214

115
Key Reference
Marker
Delta
activates a second marker at the position of the first
marker. If no marker is present, two markers with the same
identification number will appear at the center of the
display. The marker number is indicated above the delta
marker, and the same number is indicated with an
R
(for
example,
1R
) above the reference marker. The amplitude and
frequency (or time) of the first marker is fixed. Use the data
control keys to position the delta marker. Annotation in the
active function block and in the upper- right corner indicates
the differences between the two markers, frequency/time and
amplitude.
Key access:
Marker > Mode > Delta
Delta Pair
Toggles the
Delta Pair
between the reference
(start) and delta (stop) markers. The start marker number is
indicated with a number and an
R
(reference) above the
marker (for example,
1R
). The delta marker is identified with
the marker number only.
Key access:
Marker > Mode > Delta Pair
Span Pair
Toggles the
Span Pair
function between the span
and center markers. The start marker number is indicated
with a number and an
R
above the marker (such as
1R
) and
the stop marker is indicated with only the marker number.
Adjusting the span changes the frequency difference between
the two markers while maintaining the midpoint at a fixed
frequency. Selecting
Center
changes the center point between
the two markers while maintaining the frequency difference.
Key access:
Marker > Mode > Span Pair
Off
Turns off the active function markers.
Key access:
Marker
>
Mode > Off
NOTE
Ref and Delta markers maintain their displayed x-axis location. But,
the frequency values will change if the frequency or span parameters
define the x-axis scale are changed. Reset these markers, if necessary,
when parameters such as span or center freq are changed.