MDO3000 Programmer Manual.pdf - 第984页

Commands Listed in A lphabetical Order Examples WFMInpre:WFMT YPe RF_FD specifies the type of the incoming waveform as a frequency domain trace ( to be display ed on the frequen cy domain window). WFMInpre:WFM TYPe? might…

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Commands Listed in Alphabetical Order
Examples
WFMinpre:SPAN
500.0E+6
sets the span to 500 MHz.
WFMinpre:SPAN? might return 500.0E+6, indicating that the span has been set
to 500 MHz.
WFMInpre:WFMTYPe
This comman
d specifies the type of waveform that is being transferred to the
oscilloscope for storage in one of the REF1 - REF4 memory locations. The
waveform type possibilities are the ANALOG, the RF time domain waveforms
(RF_TD), or the RF frequency domain waveforms (RF_FD). The default is
ANALOG. This parameter should be set before using the
CURVe command to
transfer a waveform from a PC to an internal reference location.
The type of waveform that is being transferred in turn determines which window
will display it on the instrument screen: the time domain window or frequency
domain w
indow. Both the analog and RF-TD arguments specify the time domain
window; the RF_FD argument specifies the frequency domain window.
NOTE. This command is not applicable for digital waveforms.
Conditions
The RF_FD type waveform is only supported on MDO4000/B/C series models.
The
R
F_TD
type waveform is supported on both MDO4000/B/C and
MDO3000 models.
Group
Waveform Transfer
Syntax
WFMInpre:WFMTYPe {ANALOG|RF_TD|RF_FD}
WFMInpre:WFMTYPe?
Related Commands
WFMInpre:DOMain
Arguments
ANALOG — this type includes Channels 1–4 and the Math waveform, and specifies
to display it in the time domain window.
RF_TD — this type includes the three RF time domain traces (RF Amplitude vs.
Time, RF Frequency vs. Time, and RF Phase vs. Time) and specifies to display it
in the time domain window.
RF_FD — this type includes the four RF frequency domain traces (RF Normal,
RF Average, RF Max Hold, a
nd RF Min Hold) and specifies to display it in the
frequency domain window.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-953
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