Table of Contents
Advertisement
Waveform
Record
Data Acquisition
Normal Mode
Average Mode
HP 16529/16539
The waveform record is actually contained in two portions; the waveform
data and preamble. The waveform data is the actual data acquired for
each point. The preamble contains the information for interpreting
waveform data. Data in the preamble includes number of points acquired,
format of acquired data, average count and the type of acquired data.
The preamble also contains the X and Y increments, origins, and
references for the acquired data for translation to time
The values set in the preamble are based on the settings of the variables in
the ACQuire, WAVeform, CHANnel, and TIMebase subsystems. The
count, the WAVeform subsystem sets the number of points and the format
mode for sending waveform data over the remote interface and the
The two acquisition types that may be chosen are Normal and Average.
In the Normal mode, with Accumulate command OFF, the oscihoscope
acquires waveform data and then displays the waveform. When the
oscilloscope takes a new acquisition, the previously acquired waveform is
erased from the display and replaced by the newly acquired waveform.
When ACCumulate is set ON, the oscilloscope displays all the waveform
acquisitions without erasing the previously acquired waveform.
In the Average mode, the oscilloscope averages the data points on the
waveform with previously acquired data. Averaging helps eliminate
random noise from the displayed waveform. in this mode ACCumulate is
set to OFF. When Average mode is selected the number of averages must
also be specified using the COUNt command. Previously displayed
waveform data is erased from the display and the newly averaged
waveform is displayed.
and
voltage values.
26-3
Advertisement
Table of Contents
