Tektronix DPO4000 Manual de usuario Pagina 208

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Commands Listed in Alphabetical Order
Group
Math
Syntax
MATH[1]?
Related Commands
MATH[1]:TYPe
Examples
MATH? or MATH1? might return :MATH:TYPE DUAL; DEFINE
"CH1+CH2";VERTICAL:SCALE 100.0000E-3;P OSITION 0.0000;UNITS
"V";:MATH:HORIZONTAL:SCAL E 4.0000E-6;POSITION 50.0000;UNITS
"s";:MATH:SPECTRAL:MAG DB;WINDOW HANNING
MATH[1]:DEFine
Sets or returns the current math function as a text string.
Dual math is dened if the string is of the form
<wfm> < operation> <wfm>,
where the <wfm>s are any combination of live channels or reference waveforms,
<operation> is any of +, -, * or /, and the MATH[1]:TYPe is DUAL.
FFT math is dened if the string is in the form
FFT(<wfm>), where <wfm> is any
live channel or reference waveform, and theMATH[1]:TYPe is FFT.
Advanced math is dened if the contents of the string can be parsed by the
advanced math parser without errors and the MATH[1]:TYPe is ADVanced.
On the front panel, the Dual Wfm Math, FFT and Advanced Math menus contain
controls that allow building equivalent math expressions to those d escribed above.
Group
Math
Syntax
MATH[1]:DEFine <QString>
MATH[1]:DEFine?
Related Commands
MATHVAR:VAR<x>, MATH[1]:TYPe
Arguments
<QString> quoted string argument is the mathematical expression that denes
the waveform.
Table 2-40: Advanced Math expression elements
Expression Description
CH1-CH4, REF1-REF4 Species a waveform data source.
2-198 MSO4000 and DPO4000 Series Programmer Manual
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