User`s guide

228 53220A/53230A User’s Guide
6 53220A/53230A Math, Graphing, and Data Logging
Zoom & Markers Window
The ‘Marker’ softkeys allow you to position markers on individual readings or
decimation points within the trend chart, and if desired, lock the relative dis-
tance between the markers. When locked together, moving either Marker1 or
Marker2 with the front panel knob or using [Shift] followed by a reading number,
moves both markers while maintaining the distance between the two. The data
corresponding to the marker positions is shown above the trend window.
Zoom determines the number of readings displayed by increasing the resolu-
tion at the center region of the trend chart window. Each time the zoom is
adjusted, the reading indices (Figure 6-8) are changed to show the current
reading range.
Pan scans the trend chart (left or right) once a zoom percentage has been set.
By moving the Pan window, regions of interest can be brought into view; and
Zoom used again to expand the region. Pan, used interchangeably with Zoom in
this manner, maintains the zoom percentage.
With Pan, each reading or decimation point can also be viewed - up to the win-
dow maximum of 100 readings/points at a time.
NOTE
For marker, zoom, and pan adjustment the decimal position (i.e. 1000's, 100's,
10's, 1's) highlighted by the arrow keys sets the amount of movement
(coarse or fine) for each tick of the rotary knob.