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WaveSurfer 3000 Oscilloscopes
Viewing Statistics
You can add the statistical measures
value(last)
,
mean
,
min.
,
max.
,
sdev
, and
num
(ber of measurements computed) to
the measurement parameter readout table.
To turn on statistics, access the Measure dialog and check
Statistics On
. Clear the checkbox to remove statistics from
the readout. You can also choose
Measure > Statistics
from the menu bar.
The num statistic is the number of measurements computed. For any parameter that computes on an entire waveform
(like amplitude, mean, minimum, maximum, etc.) the value displayed represents the number of sweeps.
For any parameter that computes on every event, the value displayed is equal to the number of events per acquired
waveform. If
x
waveforms were acquired, the value represents
x
times the number of cycles per waveform. The value
(last) statistic is equal to the measurement of the last cycle on the last acquisition.
To reset the statistics counter, touch
Clear Sweeps
on the display or front panel.
Viewing Histicons
Histicons are miniature histograms of measurement parameters that appear on the measurement table. These
thumbnail histograms let you see at a glance the statistical distribution of each parameter.
To turn on Histicons, access the Measure dialog and check
Histicons
. Clear the checkbox to remove histicons from the
readout.
Gating Measurements
By using gates, you can narrow the span of the waveform on which to perform parameter measurements, allowing you
to focus on the area of greatest interest. For example, if you "gate" five rising edges of the waveform, the parameter
calculations for rise time are performed only on the five pulses bounded by the gate posts.
The default starting positions of the gate posts are 0 div and 10 div, which coincide with the left and right ends of the
grid. The gate, therefore, initially encloses the entire waveform.
The quickest way to set a gate is by dragging the gate posts located at the far left and right of the grid to the desired
positions.
You can refine this setting by specifying a position down to hundredths of a division in the
Gate Start
and
Stop
fields on
the main Measure dialog dialog. All parameters share the same gate.
Touch the
Default
button to return gates to the width of the trace.
44
923648 Rev A
Содержание WaveSurfer 3000
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