3-2 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
Information on This Chapter 8719ES/20ES/22ES
RF Network Analyzers
Information on This Chapter
The accuracy of the analyzer is achieved and maintained through mechanical adjustments,
electrical adjustments, and correction constants (CCs). The correction constants are
empirically derived data that are stored in memory and then recalled to refine the
instrument’s measurements and to determine its proper operation.
Anytime the CPU (A7) assembly is replaced, all of the correction constants must be
regenerated and stored to the new CPU assembly board. Agilent Technologies recommends
that you store the correction constant data to 3.5 inch disk as a backup. The procedure for
storing correction constant data to 3.5 inch disk can be found in “EEPROM Backup Disk
Procedure” on page 3-33.
Additionally, there are adjustments and correction constants that must be performed
following the replacement of an assembly. Refer to Table 14-1 on page 14-35 of
Chapter 14 , “Assembly Replacement and Post-Repair Procedures,” in order to determine
which adjustments and correction constants procedures to perform.
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