Agilent Technologies InfiniiVision 4000 X-Series Programmer's Manual page 439

:MEASure:FALLtime
Command Syntax
:MEASure:FALLtime [<source>]
<source> ::= {CHANnel<n> | FUNCtion<m> | MATH<m> | WMEMory<r>}
<n> ::= 1 to (# analog channels) in NR1 format
<m> ::= 1-4 in NR1 format
<r> ::= 1 to (# ref waveforms) in NR1 format
The :MEASure:FALLtime command installs a screen measurement and
starts a fall- time measurement. For highest measurement accuracy, set the
sweep speed as fast as possible, while leaving the falling edge of the
waveform on the display. If the optional source parameter is specified, the
current source is modified.
This command is not available if the source is FFT (Fast Fourier Transform).
N O T E
Query Syntax
:MEASure:FALLtime? [<source>]
The :MEASure:FALLtime? query measures and outputs the fall time of the
displayed falling (negative- going) edge closest to the trigger reference. The
fall time is determined by measuring the time at the upper threshold of
the falling edge, then measuring the time at the lower threshold of the
falling edge, and calculating the fall time with the following formula:
Return Format
<value><NL>
<value> ::= time in seconds between the lower threshold and upper
See Also
•
•
•
Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
(see page 1208)
fall time = time at lower threshold - time at upper threshold
threshold in NR3 format
"Introduction to :MEASure Commands"
":MEASure:RISetime"
":MEASure:SOURce"
on page 420
on page 455
on page 458
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:MEASure Commands
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