Options— 2230 Service
Table 7-21
Waveform Preamble Fields
Header
WFMpre
WFId
Argument
Link
Argument Description
‘ascii str'
The WFId field includes labeling information to help you
remember key features about the waveform. The information
includes Vertical Mode, Coupling, Volts/Div, Time/Div, and
Acquisition Mode. The scaling information is the same as in the
corresponding preamble fields, but is labeled in the appropriate
units. There is no command form of this argument. If received
as a command, it is ignored.
The fields and their possible values for the WFId section of the
preamble are:
Source
Chan Cplng Vert
Horiz Acq-Mode
ACQ CHI
DC
0.2MV
50ns
SMPL
REF1
CH2 AC
AVG
XY GND
PKDET
Unknown
5V
5s
PKDET-
SMOOTH
ACCPK
REF4
DIVS
CLKS
ACCPK-
SMOOTH
ENCdg
NR.Pts
ASCii
[BINary]
HEX
<NFt1>
Determines waveform encoding for waveform transmission or
reception. WFMpre ENCdg and DATa ENCdg operate
identically. Power-up default is BINary. All ENCdg formats
represent unsigned integers.
Number of points in waveform. Each point can be a single Y
value (T implied), an X-Y pair, or an Max-Min pair. Although
digitized record length is either 1024 or 4096 points, NR.Pts
may be 256, 512, 1024, 2048, or 4096, depending on number
of acquired channels, acquisition mode, whether or not
smoothing is enabled.
NR.pts to
Num
Chn
Acquire
Mode
SMOOTH
ON/OFF
RECLEN
Ratio
1
SMPL N/A RECLEN/1
1
AVG N/A RECLEN/1
1 PKDET ON
RECLEN/1
1
ACCPK
ON
RECLEN/1
2 SMPL N/A
RECLEN/2
2
AVG N/A RECLEN/2
2 PKDET
ON
RECLEN/2
2 ACCPK ON RECLEN/2
1 PKDET OFF
RECLEN/2
1 ACCPK OFF
RECLEN/2
2 PKDET OFF RECLEN/4
2
ACCPK OFF
RECLEN/4
7-23
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