HP 7925D Service Manual page 225

Appendix A
Table A-B. Self-Test Function Test Description (Continued)
7925
TEST
NO. TEST DESCRIPTION
2 PHI Tuning This test is not a legitimate part of the self-test routine. It is provided for diagnostic
Procedure and service purposes. When selected, self test loops through the program steps de-
scribed in the PHI data sheet. The HSE waveform can be measured and the delay
stabilization trimmer adjusted.
1 Drive Random Seek This test is not a legitimate part of the self-test routine. It is provided for diagnostic
Procedure and service purposes. When selected, self test will generate seek commands using a
pseudo-random number generator.
A-44