MDO3000 Programmer Manual.pdf - 第985页
Commands Listed in Alphabetical Order Group W aveform T rans fer Syntax WFMInpre:XUNi t <QString> WFMInpre:XUNi t? Related Commands WFMOutpre:XUNit? Arguments <QString> contains the characters that represent …
Commands Listed in Alphabetical Order
Examples
WFMInpre:WFMT
YPe RF_FD
specifies the type of the incoming waveform as a
frequency domain trace (to be displayed on the frequency domain window).
WFMInpre:WFM
TYPe?
might return ANALO G, indicating that the incoming
waveform type is either Channel 1–4 or Math (to be displayed on the time domain
window).
WFMInpre:X
INcr
This command specifies the horizontal interval between incoming waveform
points sent to the oscilloscope using the
CURVE command. The units are time,
in second
s, or frequency, in hertz, and can be specified or queried using the
WFMInpre:XUNit command.
(See pag
e 2-95, Waveform Transfer Command Group.)
Group
Waveform Transfer
Syntax
WFMInpre:XINcr <NR3>
WFMInpre:XINcr?
Related Commands
WFMInpre:XUNit,
WFMOutpre:XINcr?
Arguments
<NR3> is a floating point number that specifies the horizontal interval
representation.
Examples
WFMINPRE:XINCR 3E-3 sets the interval between incoming waveform points
to3ms.
WFMINPRE:XINCR ? might return :WFMINPRE :XINCR 1.0000E-3 indicating
that if WFMInpre:XUNit is set to "s", there is a 1 ms interval between incoming
waveform points.
WFMInpre:XUNit
This command specifies the horizontal units of the x-axis of the data points being
sent to the oscilloscope using the
CURVE command. This value can be in “s”
for seconds, or “Hz”.
(See page 2-95, Waveform Transfer Command Group.)
2-954 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Group
Waveform Trans
fer
Syntax
WFMInpre:XUNit <QString>
WFMInpre:XUNit?
Related Commands
WFMOutpre:XUNit?
Arguments
<QString> contains the characters that represent the horizontal units for the
incoming waveform.
Examples
WFMINPRE:XUNIT "HZ" specifies that the horizontal units for the incoming
waveform are hertz.
WFMINPRE:XUNIT? might return :WFMINPRE:XUNIT "s" indicating that the
horizontal units for the incoming waveform are seconds.
WFMInpre:XZEro
This command specifies the position value of the first data point in the incoming
waveform record being sent to the oscilloscope using the
CURVE command.
The units are determined or queried using the
WFMInpre:XUNit command and
are typically time, in seconds, or frequency, in hertz. This time or frequency
is relative to the time or frequency of the trigger, which is always 0. Thus, the
XZEro value can be negative.
(See page 2-95, Waveform Transfer Command Group.)
Group
Waveform Transfer
Syntax
WFMInpre:XZEro <NR3>
WFMInpre:XZEro?
Related Commands
WFMInpre:XINcr,
WFMInpre:XUNit,
WFMOutpre:XZEro?
Arguments
<NR3> is the floating point value of the position, in XUNits, o
f the first sample in
the incoming waveform. If XUNits is “s”, <
NR3> is the time of the first sample in
the incoming waveform.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-955
Commands Listed in Alphabetical Order
Examples
WFMINPRE:XZER
O 5.7E-6
, which indicates the trigger occurred 5.7 µs before the
first sample in the waveform.
WFMINPRE:XZE
RO?
might return :WFMINPRE:XZEro –7.5000E-6 indicating
that the trigger occurs 7.5 µs after the first sample in the waveform.
WFMInpre:YMUlt
This command specifies the vertical scale multiplying factor to be used to convert
the incoming data point values being sent to the oscilloscope, from digitizing
levels into the units specified by the
WFMInpre:YUNit command. For one byte
waveform
data, there are 256 digitizing levels. For two byte waveform data there
are 65,536 digitizing levels.
The
WFMI
npre:YMUlt
, WF MInpre:YOFf, and WFMInpre:YZEro values
are used to convert waveform record values to units specified using the
WFMInpre:YUNit command (YUNit units). It uses the following formula (where
dl means digitizing level; curve_in_dl is a data point value in the
CURVe data):
Value in YUNit units = ((curve_in_dl - YOFf) * YMUlt) + YZEro
(See page 2-95, Waveform Transfer Command Group.)
NOTE. For a given waveform record, YMUlt, YOFf, and YZEro have to be a
consistent set, otherwise v ertical cursor readouts and vertical measurements may
give incorrect results.
Gro
up
Waveform Transfer
Syntax
WFMInpre:YMUlt <NR3>
WFMInpre:YMUlt?
Related Commands
DATa:DESTination,
WFMInpre:BYT_Nr,
WFMInpre:YUNit
Arguments
<NR3> is a floating point number that specifies the vertical scale factor per
digitizing level of the incoming waveform points.
Examples
WFMINPRE:YMULT? might return :WFMINPRE:YMULT 40.0000E-3,which(if
YUNit is “V”) indicates that the vertical scale is 40 mV/digitizing level (1V/div
for 8-bit data).
2-956 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual