74 34405A User’s and Service Guide
4 Performance Tests and Calibration
• You can initiate a more complete self- test by sending the
*TST? command to the instrument. This command returns
a "+0" if all the self- tests pass, or a "+1" if a failure
occurred. This command may take up to 30 seconds to
complete. You may need to set an appropriate interface
time- out value.
Quick Performance Check
The quick performance check is a combination of internal
self- test and an abbreviated performance test (specified by
the letter Q in the performance verification tests). This test
provides a simple method to achieve high confidence in the
instrument's ability to functionally operate and meet
specifications. These tests represent the absolute minimum
set of performance checks recommended following any
service activity. Auditing the instrument's performance for
the quick check points (designated by a Q) verifies
performance for "normal" accuracy drift mechanisms. This
test does not check for abnormal component failures.
To perform the quick performance check, do the following:
• Perform a self- test as described in the preceding section.
• Perform only the performance verification tests indicated
in the following tables with the letter Q.
If the instrument fails the quick performance check,
adjustment or repair is required
34405A users guide.book Page 74 Saturday, September 2, 2006 3:38 PM
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