Agilent Technologies 8935 Series, Руководство пользователя

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158 Chapter 7
Periodic Adjustments
Periodic Adjustments
Periodic Adjustments
Some assemblies or combinations of assemblies require periodic
adjustments to compensate for variations in circuit performance due to
age or environment.
There are two types of calibration data:
• Factory-generated digital data either on memory cards, or on ROMs
(which are on the assemblies themselves)
• Data generated internally by running calibration programs
In either case calibration data is loaded into non-volatile memory on the
A2A31 Controller.
NOTE
Because calibration data resides on the A2A31 Controller assembly, it is
important that whenever the assembly is replaced that the data be
transferred from the original assembly to the new one. 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.
To download calibration data supplied on a memory card, follow the
instructions that come with the replacement assembly. To create and
download calibration data for assemblies requiring a periodic
adjustment, follow the steps later in this chapter. For a summary of
assemblies and their calibration requirements, see
Table 7-1 on page
159 .