Technical data

:WAVeform Commands 30
Keysight InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide 633
WORD format (see ":WAVeform:FORMat" on page 639) provides 16-bit access
to the waveform data. In the WORD format, the number of data bytes is twice
the number of data points. The number of data points is the value returned by
the :WAVeform:POINts? query (see page 640). If the data intrinsically has less
than 16 bits of resolution, the data is left-shifted to provide 16 bits of resolution
and the least significant bits are set to 0. Currently, the greatest intrinsic
resolution of any data is 12 bits, so at least the lowest 4 bits of data will be 0. If
there is a hole in the data, the hole is represented by a 16 bit value equal to 0.
Use :WAVeform:BYTeorder (see page 635) to determine if the least significant
byte or most significant byte is to be transferred first. The :BYTeorder command
can be used to alter the transmit sequence to match the storage sequence of
an integer in the programming language being used.
Data Format for Transfer - BYTE format
The BYTE format (see ":WAVeform:FORMat" on page 639 ) allows 8-bit access
to the waveform data. If the data intrinsically has more than 8 bits of resolution
(averaged data), the data is right-shifted (truncated) to fit into 8 bits. If there is
a hole in the data, the hole is represented by a value of 0. The BYTE-formatted
data transfers over the programming interface faster than ASCii or
WORD-formatted data, because in ASCii format, as many as 13 bytes per point
are transferred, in BYTE format one byte per point is transferred, and in WORD
format two bytes per point are transferred.
The :WAVeform:BYTeorder command (see page 635) has no effect when the
data format is BYTE.
Digital Channel Data (MSO models only)
The waveform record for digital channels is similar to that of analog channels. The
main difference is that the data points represent either DIGital0,..,7 (POD1),
DIGital8,..,15 (POD2), or any grouping of digital channels (BUS1 or BUS2).
For digital channels, :WAVeform:UNSigned (see page 655) must be set to ON.
Digital Channel POD Data Format
Data for digital channels is only available in groups of 8 bits (Pod1 = D0 - D7, Pod2
= D8 - D15). The bytes are organized as:
If the :WAVeform:FORMat is WORD (see page 639) is WORD, every other data
byte will be 0. The setting of :WAVeform:BYTeorder (see page 635) controls which
byte is 0.
:WAVeform:SOURce Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
POD1 D7 D6 D5 D4 D3 D2 D1 D0
POD2 D15 D14 D13 D12 D11 D10 D9 D8