Manual And Automated Adjustments - HP 8924C Assembly

Manual and Automated Adjustments

Storing Calibration
Data
NOTE: Because calibration data resides on the A16 Host Controller assembly, it is important to
transfer calibration data from the original failing Host Controller assembly to its replacement
assembly. The calibration data resides in a socketed EEPROM which can be moved with little
danger of losing its contents. Refer to the instructions accompanying the replacement
assembly for details.
When to Make
Adjustments
N:\mkt\MANUALS\HP8924C\ALR\per_adj.fb
The Oven Oscillator (A38) frequency is the only manual adjustment made; the
remaining adjustments are made automatically when the internal Periodic
Calibration routines (PER_CAL3, CDMA_CAL, and PCB_CAL) are run, or
when certain "zeroing" fields are selected on various screens. Any other manual
adjustments must not be altered from their factory settings.
There are two types of calibration data:
• Factory-supplied data on memory cards shipped with the new assembly or already
programmed into the new assembly's ROMs. (Instructions for downloading calibration
data from the memory card are provided with the replacement assembly.)
• Data generated internally by running calibration programs.
Periodic Calibration Programs" on page 142
In either case calibration data is loaded into non-volatile memory on the A16 Host
Controller.
The internal calibration programs should be run whenever an assembly requiring
calibration is replaced. It is also recommended that all the procedures in the
periodic calibration programs be run at least once a year.
Chapter 4, Periodic Adjustments
See
"Running the
.
139
Introduction