53220A/53230A User’s Guide 229
53220A/53230A Math, Graphing, and Data Logging 6
Show All updates the trend window to represent the current reading count. The
reading indices are 0 and the Count value, and zoom and pan are also reset.
Reading Decimation
The trend window displays a maximum of 100 readings. When greater than
100 readings are displayed, the readings are decimated - grouped together and
represented by decimation points. The number of readings in a decimation
group is the reading count/100.
Figure 6-10 is a trend chart of 100,000 readings in which the readings have
been decimated.
Figure 6-10. Trend Chart Display Format (with Decimation).
Max: maximum reading values within groups at
decimation points selected by Marker1 (top) and
Marker2 (bottom)
Span: difference in maximum values between marker
locations
Reading: number of first reading in selected
decimation group
Span: number of decimation groups between
marker locations
in: minimum readings
ithin groups at selected
ecimation points
Limit checking (upper and
lower) enabled through Math
functions (optional)
indicates decimation
and relative max & min
values within the group
position window
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