4-8
Sweeps
Model 6220/6221 Reference Manual
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Setting sweep parameters
Custom sweep editing
A typical custom sweep editing display is shown below:
P12345: +1.234567 mA
Del:123456.789s Cmpl:100.00 V
The leftmost value on the top line is the point number, and the next value is the
actual current setting. The formatting also shows the current range. The bottom
line values are delay in seconds and compliance. Before entering this display, you
should use the #-POINTS menu to select the number of sweep points. The editing
for the custom sweep point adjust menu will not accept values above the number
of points selected.
As the point number is changed, the current, delay, and compliance values will
change to reflect the settings for the new point. Move the cursor to the right to edit
the current value. Continued movement to the right will highlight the range prefix.
A right arrow keypress then takes the editing into the bottom line for the delay
value. Continued right arrow key presses take you into the compliance value.
Values can be freely entered, but they do not take effect for that point until
ENTER is pressed. After pressing ENTER, the cursor is set back at the point
index. Of course, you can also use the left arrow keys to freely move back and
forth between the different values until you have adjusted the source level, delay,
and compliance to their desired values. If, however, you change the point number
without having pressed ENTER, then any values you entered for source, compli-
ance, and delay are lost and must be reentered.
Using auto-copy with custom sweeps
Editing a custom sweep of more than a few points can be cumbersome, especially
if you must constantly enter the compliance and delay values for each point.
Therefore, an “auto-copy” feature is included to help reduce keystrokes. If auto-
copy is enabled, whenever a point is entered (by pressing the ENTER key), the
compliance and delay values will automatically be copied to all higher-numbered
points in the list.
Example:
Consider a 10-point sweep of points 0-9. Assume that points 0-4 are to have a 1
second delay and 25V compliance, while points 5-9 will have a 1.5 second delay
and 30V compliance. If you enter point #00000 with a 1 second delay and 25V
compliance, these two values (but not the I value) are copied to all points 0-9.
When you then edit point #00005 and change the compliance to 30V and the
delay to 1.5 seconds, these compliance and delay values will be automatically
copied to points 5-9. See
“Performing a custom sweep,” on page 4-13
for the
complete procedure.
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