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Name
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Description
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Fetch Duty Cycle
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Returns the ratio of the pulse on-time to off-time.
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Fetch Edge Delay
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Returns time offset from the trigger reference to the first mesial transition level of either slope on the waveform.
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Fetch Fall Time
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Returns the interval between the last signal crossing of the distal line to the last signalcrossing of the proximal line.
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Fetch Offtime
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Returns the time a repetitive pulse is off. (Equal to the pulse period minus the pulsewidth).
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Fetch Overshoot
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Returns the difference between the distortion following a major transition and the IEEE top line in dB or percent, depending on the channel units.
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Fetch Period
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Returns the interval between two successive pulses. (Reciprocal of the Pulse RepetitionFrequency)
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Fetch Power Array
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Returns an array of the current automatic amplitude measurements performed on a periodic pulse waveform. Measurements performed are: peak amplitude during the pulse, average amplitude over a full cycle of the pulse waveform, average amplitude during the pulse, IEEE top amplitude, IEEE bottom amplitude, and overshoot. Units are the same as the channel's units. Note the pulse overshoot is returned in dB for logarithmic channel units, and percent for all other units. Also, the pulse ?ON interval used for peak and average calculations is defined by the SENSe:PULSe:STARTGT and :ENDGT time gating settings. A full pulse (rise and fall) must be visible on the display to make average and peak pulse power measurements, and a full cycle of the waveform must be visible to calculate average cycle amplitude.
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Fetch Pulse Cycle Avg
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Returns the average power of the entire pulse.
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Fetch Pulse On Average
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Average power of the ON portion of the pulse.
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Fetch Pulse Peak
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Returns the peak amplitude during the pulse.
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Fetch Rise Time
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Returns the interval between the first signal crossing of the proximal line to the first signal crossing of the distal line.
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Fetch Time Array
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Returns an array of the current automatic timing measurements performed on a periodic pulse waveform. Measurements performed are: the frequency, period, width, offtime and duty cycle of the pulse waveform, and the risetime and falltime of the edge transitions. For each of the measurements to be performed, the appropriate items to be measured must within the trace window. Pulse frequency, period, offtime and duty cycle measurements require that an entire cycle of the pulse waveform (minimum of three edge transitions) be present. Pulse width measurement requires that at least one full pulse is visible, and is most accurate if the pulse width is at least 0.4 divisions. Risetime and falltime measurements require that the edge being measured is visible, and will be most accurate if the transition takes at least 0.1 divisions. It is always best to have the power meter set on the fastest timebase possible that meets the edge visibility restrictions. Set the trace averaging as high as practical to reduce fluctuations and noise in the pulse timing measurements. Note that the timing of the edge transitions is defined by the settings of the SENSe:PULSe:DISTal, :MESIal and :PROXimal settings; see the descriptions for those commands. Units are the same as the channel's units.
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Fetch Width
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Returns the pulse width, i.e. the interval between the first and second signal crossings of the mesial line.
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FetchCW Array
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Returns the current average, maximum, minimum powers or voltages and the peak-to-average ratio of the specified channel. Units are the same as the channel's units. Note the peak-to-average ratio and marker ratio are returned in dB for logarithmic channel units, and percent for all other channel units.
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FetchIEEE Bottom
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Returns the IEEE-define base line, i.e. The two portions of a pulse waveform which represent the first nominal state from which a pulse departs and to which it ultimately returns.
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FetchIEEE Top
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Returns the IEEE-defined top line, i.e. the portion of a pulse waveform which represents the second nominal state of a pulse.
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FetchPRF
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Returns the number of cycles of a repetitive signal that take place in one second (Pulse Repetition Frequency).
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