TDS5000B Online Programmer Guide
-- 7 9 --
form acquisition. The number of samples taken during the acquisition
interval determines the number of data values that compose the aver-
age.
H AVErage
Specifies averaging mode, in which the resulting waveform shows an
average of SAMple data points from several separate waveform ac-
quisitions. The instrument processes the number of waveforms you
specify into the acquired waveform, creating a running exponential
average of the input signal. The number of waveform acquisitions that
go into making up the average waveform is set or queried using the
ACQuire:NUMAVg command.
H ENVelope
Specifies envelope mode, where the resulting waveform shows the
PEAKdetect range of data points from several separate waveform
acquisitions. The number of waveform acquisitions that go into mak-
ing up the envelope waveform is set or queried using the AC-
Quire:NUMENv command.
H WFMDB
WfmDB (Waveform Database) mode acquires and displays a wave-
form pixmap. A pixmap is the accumulation of one or more acquisi-
tions.
The oscilloscope acquires data after each trigger event using Sample
mode; it then determines the pix map location of each sample point
and accumulates it with stored data from previous acquisitions.
A Pix map is a two dimensional array. The value at each point in the
array is a counter that reflects the hit intensity. Infinite and noninfinite
persist display modes affect how pix maps are accumulated. Zoom,
Math, FastAcq, FastFrame, XY, XYZ, Roll, and Interpolated Time
(IT) Sampling Mode are conflicting features to WFMDB acqMode.
Turning on one of them generally turns the other one off. Selection of
some standard masks (for example, eye masks, which require option
SM) changes the acquisition mode to WFMDB.
Example 1
ACQuire:MODe ENVelope
Sets the acquisition mode to display a waveform that is an envelope of
many individual waveform acquisitions.
Example 2
ACQuire:MODe?
This command might return
:ACQuire:MODe AVERAGE
indicating that the displayed waveform is the average of the specified
number of waveform acquisitions.
To Next Page
Loading...
Need help?
General
