User manual

Appendix C
C.1 Exciters
Section 6.2 of the T50 Users Manual describes a procedure to calibrate an Exciter manually.
From revision 1.4 of
WinTekHelp, this command line method
has been given a Windows
“front-end”.
The underlying calibration program, which is “built into” the firmware is invoked
automatically in this Windows front-end, when users choose options from dialog boxes.
Consequently the equipment lists etc that are shown in 6.1 of the User Manual are the same,
and the 6 “types” of calibration that are described in 6.2 are also the same.
After entering the Calibration menu via the “Other” menu,
WinTekHelp will open a dialog
box similar to the following shown in Fig.
C1.
WinTekHelp checks the calibration status before opening this dialog box, and each stage that
has already been calibrated, is marked as having being calibrated in the check box beside the
button associated with that stage. The user can select which type of calibration they wish to
perform by selecting the appropriate button.
With the exception of the buttons marked “Miscellaneous” and “Reference Clocks”, the
operation of the calibration procedure is almost exactly the same as indicated in Section 6.2 of
the manual.
Most of the calibration stages need only be done at the factory. This is particularly true for
the first stage marked as “Miscellaneous”. Its primary purpose is to assign a model name and
serial number to the unit. These values
can only be done once. The procedure
is also used to
record the reference voltage used by all the DACs and ADC devices. This is a non-critical
task and simply improves, marginally, the accuracy of information reported by the
Operational Status dialog box (see Section 3.1). It also does some basic functional go/nogo
testing to aid the technicians when they receive a unit from production.
Fig C.1