HP 8712C, User Manual, Page: 34 / 559

I
Preventive Maintenance
Preventive maintenance consists of two tasks. It should be performed at least
every six months-more often if the instrument is used daily on a production
line or in a harsh environment.
Clean the CRT
Use a soft cloth and, if necessary, a mild cleaning solution.
Check the RF Front
Panel Connectors
Visually inspect the front panel connectors. The most important connectors
are those to which the DUT is connected, typically the RF cable end or
the RF IN connector. All connectors should be clean and the center pins
centered. The
of female connectors should be unbroken and uniform
in appearance. If you are unsure whether the connectors are good, gauge the
RF IN and RF OUT connectors to
that their dimensions are correct.
Mating plane
Max = 0.207 in.
Min in.
Figure 1-6. Maximum and Minimum Protrusion of Center Conductor From Mating Plane