13: LPT library function reference Model 4200A-SCS Parameter Analyzer
13-60 4200A-901-01 Rev. C / February 2017
Details
The asweepX command is used with the smeasX, sintgX, or savgX commands.
The trigXl or trigXg command can also be used with the asweepX command. However, once a
trigger point is reached, the sourcing device stops moving through the array. The output is held at the
last forced point for the duration of the asweepX command. Data resulting from each step is stored in
an array, as noted above, with smeasX. After the trigger point is reached, measurements are made at
each subsequent point. Results are approximately equal because the source is held at a constant
output.
The asweepv and asweepi commands are sourcing-type commands. When called, an automatic
limit is imposed on the sourcing device. Refer to the limitX command for additional information.
The maximum number of times data is measured (using the smeasX, sintgX, or savgX command)
is determined by the num_points argument in the asweepX command. A one-dimensional result
array with the same number of data elements as the selected value of the num_points parameter
must be defined in the test program.
When multiple calls to the asweepX command are executed in the same test sequence, the smeasX,
sintgX, or savgX arrays are loaded sequentially. This appends the measurements from the second
asweepX command to the previous results. If the arrays are not dimensioned correctly, access
violations occur. The measurement table remains intact until the devint or clrscn command is
executed.
Defining new test sequences using the smeasX, sintgX, or savgX command appends the command
to the active measure list. Previous measures are still defined and will be used. The clrscn
command is used to eliminate previous buffers for the second sweep. Using the smeasX, sintgX,
and savgX commands after calling the clrscn or execut command causes the appropriate new
measures to be defined and used.
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