MDO3000 Programmer Manual.pdf - 第982页
Commands Listed in A lphabetical Order WFMInpre:REFLevel This command specifies the Reference Level of the incoming waveform. This command applies only to frequency domain waveforms. The Reference Level i s adjustable fro…
Commands Listed in Alphabetical Order
Syntax
WFMInpre:PT_F
mt {ENV|Y}
WFMInpre:PT_Fmt?
Related Commands
WFMOutpre:PT_Fmt?
Arguments
ENV specifies that the waveform is to be transmitted in envelope mode as
minimum and maximum point pairs. Only
Y values are explicitly transmitted.
Absolute coordinates are given by:
Xn = XZEro + XINcr (n - PT_Off)
Ynmax = YZEro + YMUlt (ynmax - YOFf)
Ynmin = YZEro + YMUlt (ynmin - YOFf)
Y specifies a normal waveform where one ASCII or binary data point is
transmitted for each point in the waveform record. Only
Y values are explicitly
transmitted. Absolute coordinates are given by:
Xn = XZEro + XINcr (n - PT_Off)
Yn = YZEro + YMUlt (yn - YOFf)
Examples
WFMINPRE:PT_FMT ENV sets the incoming waveform data point format to
enveloped.
WFMINPRE:PT_FMT? might return :WFMIN PRE:PT_FMT ENV indicating that the
waveform is transmitted as minimum and maximum point pairs.
WFMInpre:PT_Off
The set form of this command is ignored. The query form always returns a 0.
(This command is listed for compatibility with other Tektronix oscillos
copes.)
(See page 2-95, Waveform Transfer Command Group.)
Group
Waveform Transfer
Syntax
WFMInpre:PT_Off <NR1>
WFMInpre:PT_Off?
Arguments
Arguments are ignored.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-951
Commands Listed in Alphabetical Order
WFMInpre:REFLevel
This command specifies the Reference Level of the incoming waveform. This
command applies only to frequency domain waveforms. The Reference Level is
adjustable from 10 pico Watts (–140dBm) to 1 Watt (+30dBm).
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
Waveform Transfer
Syntax
WFMInpre:REFLevel <NR3>
WFMInpre:REFLevel?
Arguments
<NR3> is a floating point number that specifies the Reference Level of the
incoming waveform, in watts.
Examples
WFMInpre:REFLevel 1E-3 sets the reference level to 1 mW.
WFMInpre:REFLevel? might return 1.0000E-3, indicating a Reference Level
of 1 mW.
WFMInpre:SPAN
This command specifies the frequency span of the incoming RF trace. The span is
the range of frequencies that can be observed around the center frequency.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
Waveform Transfer
Syntax
WFMInpre:SPAN <NR3>
WFMInpre:SPAN?
Arguments
<NR3> is a floating point number that can range from 1 kHz to 6 GHz on
MDO4000/B/C series models. On MDO3000 models, the maximum span is
3G
Hz if the MDO3SA option is installed. Without that option, the maximum is
identical to the analog bandwidth - e.g., 500 MHz on an MDO3054 model.
2-952 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
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