Racal Instruments 2461 User Manual page 74

2461Type C User Manual
Racal Instruments  1998
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MEASure[1][:SCALar]:RTIMe?[<expected value>, <resolution>]
MEASure[1]:ARRay:RTIMe <array size>? [,<expected value>,
<resolution>]
MEASure[1][:SCALar]:RISE:TIME? [<expected value>,
<resolution>]
MEASure[1]:ARRay:RISE:TIME <array size>?
value>, <resolution>]
DESCRIPTION:
FTIMe and RTIMe are an alias for the FALL:TIME and
RISe:TIME commands respectively. These commands set
the 2461 TYPE C to measure the fall time and rise time of
the signal. The fall time is the period the signal takes to go
from 90% to 10% of its peak value. The rise time is the
period the signal takes to go from 10% to 90% of its peak
value.
The ARRay commands program the counter for multiple
measurements as specified by the <array size> parameter.
The execution of these commands forces the following
settings: channels 1 and 2 are commoned, the slope
selection for each channel is set to positive (for rise time
measurement) or negative (for fall time measurement) and
auto trigger is selected. The forced settings exist only while
this function is selected; when the instrument is set to a basic
function, then the previous values of these settings are
restored.
The optional <expected value> and <resolution> parameters
are used to derive the required number of digits of resolution.
Their units are seconds. The actual resolution derived by the
2461 TYPE C is determined by both the input signal and the
resolution set.
INITIALIZATION:
*RST Resolution = 8
EXAMPLE:
"MEASure1:FALL:TIME? "
Instructs the 2461 TYPE C to measure the fall time of the
signal applied to channel 1.
********************************************************
Programming The Type C Function Card 4-31
[,<expected
Array size = 1