MDO3000 Programmer Manual.pdf - 第999页

Commands Listed in Alphabetical Order Ta b l e 2 - 5 8 : W a v eform Suf fi xes Field Description Examples Source The source ide nti fi cation string as it appears in the front-panel scale factor readouts. “CH1–4” “Math1 “…

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Commands Listed in Alphabetical Order
Examples
WFMOutpre:REF
Level?
might return 1.0000E-3, indicating a Reference Level
of 1 mW.
WFMOutpre:SPAN? (Query Only)
This query returns the frequency span of the outgoing waveform. For non-MDO
models, this query always returns 0.0.
The span is the range of frequencies you can observe around the center frequency.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
Waveform Transfer
Syntax
WFMOutpre:SPAN?
Examples
RF:SPAN? might return 10.0000E+6, indicating the span is 10MHz.
WFMOutpre:WFId? (Query Only)
This query returns a string that describes several aspects of the acquisition
parameters for the source waveform, including Source, Coupling, Vertical
Scale, Horizontal Scale, Record Length and Acquisition Mode. If the waveform
specified by DATa:SOUrce command is not turned on, an error will be generated.
(See page 2-95, Waveform Transfer Command Group.)
(See page D-1, Waveform Transfer (WFMOutpre and CURVe Query) Examples.)
Group
Waveform Transfer
Syntax
WFMOutpre:WFId?
Related Commands
DATa:SOUrce
Returns
<QString> comprises the following comma-separated fields documented in
the tables below:
2-968 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Table 2-58: Wav
eform Suffixes
Field Description Examples
Source The source ide
ntification string as it appears in
the front-panel scale factor readouts.
“CH1–4”
“Math1
“Ref1–4"
Coupling A string describing the vertical coupling of the
waveform (t
he Source1 waveform in the case of
Dual Waveform Math).
“AC coupling”
“DC couplng
”
“GND coupling”
Ve rt Scale A string containing the vertical scale factor of
the unzoomed waveform. The numeric portion
will alway
s be four digits. The examples cover
all supported units.
“100.0 mV/div”
“20.00 dB/div”
“45.00 deg
/div”
“785.4 mrad/div”
“500.0 μVs/div”
“10.00 kV/
s/div”
“200.0 mV/div”
“50.00 unk/div”
Horiz S cale A string containing the horizontal scale factor of
the unzo
omed waveform. The numeric portion
will always be four digits. The examples cover
all supported units.
“100 ms/div”
“10.00 k
Hz/div”
Record Length
A string containing the number of waveform
points
available in the entire record. The
numeric portion is given as an integer.
“1000 points”
Acquis
ition Mode
Astrin
g describing the mode used to acquire the
waveform.
“Sample mode”
“Pk Detect mode”
“Enve
lope mode”
“Average mode”
Center Frequency A string containing the c enter frequency value
of the waveform.
“2.400GHz”
Span A string containing the frequency span value of
the
waveform.
“20.00MHz”
Ref
erence Level
Ast
ring containing the reference level value of
the waveform.
“1.000mW”
Ex
amples
WFMOUTPRE:WFID? might return :WFMOUTPRE:WFID " Ch1, DC
coupling,100.0mvolts/div,500.0µs/div, 1000 points, Sample
mode"
WFMOutpre:WFMTYPe? (Query Only)
This query returns the type of the outgoing waveform. RF_FD indicates an RF
frequency domain waveform; RF_TD indicates an RF time domain waveform;
ANALOG indicates Channel 1–4 or the Math waveform. The default is analog.
For non-MDO models, this query always returns ANALOG.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-969
Commands Listed in Alphabetical Order
The type of wave
form that is being transferred in turn determines which window
will display it on the instrument screen: (the time domain window or frequency
domain window). Both the analog and RF-TD arguments specify the time domain
window; the RF_RD argument specifies the frequency domain window.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
No RF time domain waveforms are available for the MDO3000 series.
Group
Waveform Transfer
Syntax
WFMOutpre:WFMTYPe?
Returns
ANALOG, RF_FD or RF_TD
Examples
WFMOutpre:WFMTYPe? might return RF_FD, which indicates that the outgoing
waveform is an RF frequency domain waveform (RF_AVErage, RF_MAXHold,
RF_MINHold, or RF_NORMal).
WFMOutpre:XINcr? (Query Only)
This query returns the horizontal point spacing in units of time (seconds),or
frequency (hertz) between data points in the waveform record transferred using
the
:CURVe? query. This value corresponds to the sampling interval.
If the waveform specified by the DATa:SOUrce command is not turned on, an
error will be generated.
(See page 2-95, Waveform Transfer Command Group.)
(See page D-1, Waveform Transfer (WFMOutpre and CURVe Query) Examples.)
Group
Waveform Transfer
Syntax
WFMOutpre:XINcr?
Related Commands
DATa:SOUrce,
WFMOutpre:XUNit?
Examples
WFMOUTPRE:XINCR? might return :WFMOUTPRE:XINCR 10.0000E-6
indicating that the horizontal sampling interval is 10 µs/point.
2-970 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual