438
Agilent 6000 Series Oscilloscopes Programmer's Reference
3
Commands by Subsystem
Introduction to
:WAVeform
Commands
The WAVeform subsystem is used to transfer data to a controller from the
oscilloscope waveform memories. The queries in this subsystem will only
operate when the channel selected by :WAVeform:SOURce is on.
Waveform Data and Preamble
The waveform record is actually contained in two portions: the preamble
and waveform data. The waveform record must be read from the
oscilloscope by the controller using two separate commands,
:WAVeform:DATA (see
) and :WAVeform:PREamble (see
).
The waveform data is the actual data acquired for each point in the
specified source. The preamble contains the information for interpreting
the waveform data, which includes the number of points acquired, the
format of acquired data, and the type of acquired data. The preamble also
contains the X and Y increments, origins, and references for the acquired
data, so that word and byte data can be translated to time and voltage
values.
Data Acquisition Types
There are three types of waveform acquisitions that can be selected for
analog channels with the :ACQuire:TYPE command (see
):
NORMal, AVERage, PEAK, and HRESolution. Digital channels are always
acquired using NORMal. When the data is acquired using the :DIGitize
command (see
), the data is
placed in the channel buffer of the specified source.
Once you have acquired data with the :DIGitize command, the instrument
is stopped. If the instrument is restarted (via GPIB or the front panel), or
if any instrument setting is changed, the data acquired with the :DIGitize
command may be overwritten.You should first acquire the data with the
:DIGitize command, then immediately read the data with the
:WAVeform:DATA? query (see
) before changing any instrument
setup.
A waveform record consists of either all of the acquired points or a subset
of the acquired points. The number of points acquired may be queried
using :ACQuire:POINts? (see
Helpful Hints:
n/a
:WAVeform:YORigin? (see
<return_value> ::= y-origin in the
current preamble in NR3 format
n/a
:WAVeform:YREFerence?
(see
<return_value> ::= y-reference value
in the current preamble in NR1
format
Table 76 :WAVeform Commands Summary (continued)
Command
Query
Options and Query Returns
Summary of Contents for DSO6014A/L
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