Technical data

Marker 11
Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz 207
Delta
Sets the control mode for the selected marker to Delta (see “Marker" on page 203). In Delta
mode the display shows the difference between the active (Delta) marker and a reference
marker. When Delta mode is selected the reference marker is placed at the current marker
position. If the marker is OFF both the active marker and the reference marker are placed 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. You can adjust the trace point of
the active delta marker. Annotation in the active function block and in the upper-right
corner of the display indicates the frequency or time difference and amplitude difference of
the two markers. If marker noise is set to On while using Delta and the noise marker is
placed on the noise floor, the marker readout displays signal-to-noise.
Selecting Delta while already in Delta mode causes the reference marker to be reset to the
current active (Δ) marker position, enabling you to make delta measurements from differing
reference points without having to turn off the markers and begin again. Pressing Marker
Normal moves the Reference Marker to the Delta Marker position and turns off Delta
Marker.
The amplitude of the reference marker is fixed. In non-zero spans the frequency of the
reference marker is fixed. If the center frequency of the N8201A is changed such that the
reference marker is off the screen, an arrow will appear with the marker number at the left
or the right side of the display. This indicates where the trace point is for the reference
marker.
In Zero Span the reference marker remains fixed at the trace point on which it was placed.
Also, changing Center Frequency does not move the reference marker while in Zero Span.
The markers will be turned off if the scale type is changed between log and linear.
Key Path: Marker
Remote Command:
See “Marker" on page 203 for the mode command.
Example:
CALC:MARK4:MODE DELT selects marker 4 as a delta marker and places a reference
marker at the marker 4 position. If marker 4 is OFF it places both the active and the
reference markers at the center of the display.
Delta Pair
Sets the control mode for the selected marker to Delta Pair (see “Marker" on page 203). In
Delta Pair mode the display shows the difference between the delta marker and a reference
marker and enables you to adjust both the Ref (start) and Delta (stop) markers
independently. In the lower-right pane you can control both markers independently using