Technical data

203

User’s and SCPI Programming Guide

Agilent Technologies

Marker

Allows you to access the marker control menu.

Normal (POSition) - A single marker that can be moved to any point on the trace.

Delta (DELTa) - A fixed reference marker and a moveable marker that you can place at any

point on the trace.

Delta Pair (BAND) - Both a movable delta and a movable reference marker. You can

independently adjust the position of each marker.

Span Pair (SPAN) - A moveable reference and a movable delta marker. You can adjust the

center point of the markers and the frequency span between the markers.

Off (Off) - Turns off the active marker or marker pair.

Your instrument stores data to a high degree of resolution and accuracy. It is often difficult

to read the trace data directly from the screen to the desired accuracy. Markers are

diamond-shaped pointers that can be placed at any point on a trace to accurately read the

data at that point. Markers may also be use in pairs to read the difference (or delta)

between two data points. The marker number is indicated at the top right-side of the display

and also in the lower portion of the left pane, under the Marker tab. Use the Position

controls to position the marker. If a value is entered from the keyboard, the marker is moved

to the trace point nearest to that value.

There are four markers in your instrument; each can be controlled as a single marker or as a

reference/delta pair.

A trace is a connected series of points displayed on the display. The left-most point is point

0 and the right-most point (default) is 600. You control markers by moving them from trace

point or by trace units. (By selecting from the Specifier box in the lower-right pane under

the Marker tab.) Markers are shaped like diamonds. The lowest point of the diamond shape

represents the trace point that is being read. The marker number is indicated above the

active marker. The same marker number is indicated with an R (for example, 1R) above the

reference marker when in a delta mode (delta, delta pair, and span pair).

Marker Units

• Normal markers - the display shows the value of the Y-axis position of the marker in the

current Y-axis units. (See Amplitude,“Y Axis Units" on page 56.)