44 Keysight InfiniiVision DSOX1204A/G Oscilloscopes Programmer's Guide
3 Getting Started
When you send the :DIGitize command to the oscilloscope, the specified channel
signal is digitized with the current :ACQuire parameters. To obtain waveform data,
you must specify the :WAVeform parameters for the SOURce channel, the FORMat
type, and the number of POINts prior to sending the :WAVeform:DATA? query.
The number of data points comprising a waveform varies according to the number
requested in the :ACQuire subsystem. The :ACQuire subsystem determines the
number of data points, type of acquisition, and number of averages used by the
:DIGitize command. This allows you to specify exactly what the digitized
information contains.
The following program example shows a typical setup:
myScope.WriteString ":ACQuire:TYPE AVERage"
myScope.WriteString ":ACQuire:COMPlete 100"
myScope.WriteString ":ACQuire:COUNt 8"
myScope.WriteString ":DIGitize CHANnel1"
myScope.WriteString ":WAVeform:SOURce CHANnel1"
myScope.WriteString ":WAVeform:FORMat BYTE"
myScope.WriteString ":WAVeform:POINts 500"
myScope.WriteString ":WAVeform:DATA?"
This setup places the instrument into the averaged mode with eight averages. This
means that when the :DIGitize command is received, the command will execute
until the signal has been averaged at least eight times.
After receiving the :WAVeform:DATA? query, the instrument will start passing the
waveform information.
Digitized waveforms are passed from the instrument to the controller by sending a
numerical representation of each digitized point. The format of the numerical
representation is controlled with the :WAVeform:FORMat command and may be
selected as BYTE, WORD, or ASCii.
Ensure New Data is Collected
When you change the oscilloscope configuration, the waveform buffers are cleared. Before
doing a measurement, send the :DIGitize command to the oscilloscope to ensure new data has
been collected.
Set :TIMebase:MODE to MAIN when using :DIGitize
:TIMebase:MODE must be set to MAIN to perform a :DIGitize command or to perform any
:WAVeform subsystem query. A "Settings conflict" error message will be returned if these
commands are executed when MODE is set to ROLL, XY, or WINDow (zoomed). Sending the
*RST (reset) command will also set the time base mode to normal.
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