Commands Listed in Alphabetical Order
Table 2-56: Math expression elements (cont.)
Element Description Example
FREQuency(<wfm>) The first cycle in a waveform or gated
region. Frequency is the reciprocal of
the period; it is measured in hertz (Hz)
where one Hz is one cycle per second.
:MATH:DEFINE
"FREQUENCY(CH1)"
HIGH(<wfm>) This value is used as 100% whenever
high reference, mid reference, or low
reference values are needed, such as
in fall time or rise time measurements.
Calculate u sing either the min/max
or histogram method. The min/max
method uses the maximum value
found. The histogram method uses the
most common value found above the
midpoint. This value is measured over
the entire waveform or gated region.
:MATH:DEFINE
"HIGH(CH1)*CH2"
LOW(<wfm>) This value is used as 0% whenever
high reference, mid reference, or low
reference values are needed, such as
in fall time or rise time measurements.
Calculate u sing either the min/max
or histogram method. The min/max
method uses the minimum value
found. The histogram method uses the
most common value found below the
midpoint. This value is measured over
the entire waveform or gated region.
:MATH:
DEFINE "LOW(CH1)"
MAXimum(<wfm>)
The most positive peak voltage. Max is
measured over the entire waveform or
gated region.
:MATH:DEFINE
"MAXIMUM(CH1)"
MEAN(<wfm>)
The arithmetic mean over the entire
waveform or gated region.
:MATH:DEFINE "MEAN(CH1)"
MINImum(<wfm>)
The most negative peak voltage. Min is
measured over the entire waveform or
gated region.
:MATH:DEFINE
"MINIMUM(CH1)"
NDUty(<wfm>) Negative duty cycle: the ratio of the
negative pulse width to the signal period
expressed as a percentage. The duty
cycle is measured on the first cycle in
the waveform or gated region.
:M
ATH:DEFINE "NDUTY(CH1)"
NOVershoot(<wfm>)
Negative overshoot: this is measured
over the entire waveform or gated
region and is expressed as: Negative
Overshoot = (Low – Minimum) /
Amplitude x 100%.
:MATH:DEFINE
"NOVERSHOOT(CH1)"
2-410 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
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