MTS Series 793 Application - Manual (Page 448)

MTS MultiPurpose TestWare®
Data Display Process
Other Process Descriptions 448
Keep 10 Points Per Decade—This option causes the buffer to accept acquired
data until it fills, perform a decimation that retains ten points per decade of
data, shift the data, and repeat.
Unlike the other decimation options, this method does not discard points
retained from previous passes, and is especially suited to viewing trends in
peak/valley data.
First pass: Suppose the buffer initially fills with 4096 points of data. In this
case:
• 10 Points are retained in the first decade (1-10)
• 10 Points are retained in the second decade (11-100)
• 10 Points are retained in the third decade (101-1000)
• 6 Points are retained in the forth decade (1001-10,000)
In this example, the buffer retains 36 points on the first pass and discards the
remainder. Only 6 points are retained from the forth decade because the buffer
holds only 4096 points, and the next point scheduled for retention is outside of
the points stored in the buffer. After the decimation, the retained points are
shifted to the front of the buffer to form a contiguous block.
Second and subsequent passes: In subsequent passes, the buffer iterates
between filling and decimating points until the 4 remaining points in the fourth
decade are retained. After that, the buffer begins acquiring 10 points in the fifth
decade, and so forth.
The passes continue on in the same manner until the process is stopped.
Because the interval between each desired point is logarithmic, fewer points
are retained with each successive pass.
Plot Setup Tab (part 7 of 7)
I TEM D ESCRIPTION