3-14
DC Current Source Operation
Model 6220/6221 Reference Manual
Return to
When finished using the preset value, press
PRES
again to disable the feature.
The “PRES” message will cancel, and the unit will return to the original source
value. Note that the compliance value cannot be preset.
Sourcing current
To source current, (1) connect the test circuit (DUT) to the output, (2) set the
source range output value and compliance, (3) enable the output filter (if desired),
and finally, (4) turn the output on.
1.
Connect test circuit (DUT) to Model 622x output
WARNING
Before making or breaking connections, the Model 622x
must be turned off and the power cord must be discon-
nected from the AC outlet. Also, power must be removed
from all external test circuits and instrumentation.
Connection information is provided in
. Keep in mind that there
are two basic output triax connector configurations that can be selected:
•
Inner shield connected to Output Low
– Cable Guard is not available.
•
Inner shield connected to Cable Guard
with Output Low connected
to the outer shield (Earth Ground) of the triax connector.
(2).
Set the source and compliance values
•
explains how to set the source and compliance values for
the Model 6220.
•
explains how to set the source and compliance values for
the Model 6221.
While in the edit mode,
AUTO
range can be used, but range changes will
not occur during the editing process.
After setting the I-source value for a fixed range, enabling
AUTO
range will
select the optimum (lowest) range for the source value.
Remote programming
– Autorange can be used when setting the I-source
value. With autorange enabled, the Model 622x will automatically select the
optimum (lowest) range to accommodate the source value.
The commands to select the source range, and set the output and
compliance values are provided in
. The following examples
demonstrate proper syntax.
NOTE
Source preset values are not saved as part of a
user setup.
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