Keysight Technologies N9340B, Руководство пользователя

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Key Reference
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Marker
96
Delta
Key access:
[MARKER] > {Delta}
Activates a second marker at the position of the first
marker. (If no marker is present, two markers appear at
the center of the display). The amplitude and frequency
(or time) of the first marker is fixed. 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. Use the data controls to position
the delta marker. Annotation in the active function block
and in the upper-right corner of the display indicates the
frequency (or time) and amplitude differences between
the two markers. The markers will be turned off if the
scale type is changed between log and linear.
Off
Key access:
[MARKER] > {Off}
Turns off the active function markers.
NOTE
Pressing Delta again moves the reference marker to the active
marker position, so you are allowed to make delta measurements
from differing reference points without having to turn off the
makers and begin again.
NOTE
The delta marker function permits signal-to-noise measurements
provided the signal is a single spectral component (sinusoid).
Place a normal marker on the signal, press Delta, place the delta
marker in the noise, and activate Marker Noise. The indicated
amplitude indicates signal-to-noise/Hz.