Technical data

1 Performance Tests and Calibration
Performance Verification Tests Overview
8 34450A Service Guide
• If all tests pass, you have a high confidence (~90%) that the
instrument is operational.
• 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 10 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.