:WAVeform Commands 32
Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide 969
:WAVeform:DATA
(see page 1138)
Query Syntax
:WAVeform:DATA?
The :WAVeform:DATA query returns the binary block of sampled data
points transmitted using the IEEE 488.2 arbitrary block data format. The
binary data is formatted according to the settings of the
:WAVeform:UNSigned, :WAVeform:BYTeorder, :WAVeform:FORMat, and
:WAVeform:SOURce commands. The number of points returned is
controlled by the :WAVeform:POINts command.
In BYTE or WORD waveform formats, these data values have special
meaning:
• 0x00 or 0x0000 — Hole. Holes are locations where data has not yet been
acquired.
Another situation where there can be zeros in the data, incorrectly, is
when programming over telnet port 5024. Port 5024 provides a
command prompt and is intended for ASCII transfers. Use telnet port
5025 instead.
• 0x01 or 0x0001 — Clipped low. These are locations where the waveform
is clipped at the bottom of the oscilloscope display.
• 0xFF or 0xFFFF — Clipped high. These are locations where the
waveform is clipped at the top of the oscilloscope display.
Return Format
<binary block data><NL>
See Also • For a more detailed description of the data returned for different
acquisition types, see: "Introduction to :WAVeform Commands" on
page 961
• ":WAVeform:UNSigned" on page 987
• ":WAVeform:BYTeorder" on page 967
• ":WAVeform:FORMat" on page 971
• ":WAVeform:POINts" on page 972
• ":WAVeform:PREamble" on page 976
• ":WAVeform:SOURce" on page 981
• ":WAVeform:TYPE" on page 986
Example Code
' QUERY_WAVE_DATA - Outputs waveform data that is stored in a buffer.
' Query the oscilloscope for the waveform data.
myScope.WriteString ":WAV:DATA?"
' READ_WAVE_DATA - The wave data consists of two parts: the header,
' and the actual waveform data followed by a new line (NL) character.
' The query data has the following format:
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