DATATEC EDU34450A Guia Del Usuario página 86

Self Test verifies proper instrument operation. This self-test is equivalent to the *TST? SCPI query, and you do not
need to remove inputs to the instrument to run the test.
Calibration accesses the instrument's calibration procedures. See "Calibration Adjustment Procedures" in the
EDU34450A Service Guide for more details.
86 Keysight EDU34450A User's Guide