Rohde & Schwarz 1164.4391.03, Service Manual

Page: 100 / 254

Adjustment of Module Data R&S FSP
1164.4556.82 2.8 E-1
Adjustment of Module Data
All boards of the R&S FSP contain EEPROMS for storage of board data.
In addition to some standard information such as module name, serial number, hardware status and
date of manufacture, these stored data items contain important pieces of information within value tables
from module pre-testing, e.g. frequency responses for module error data.
In order to match the data stored in EEPROMs on the respective modules to the complete instrument,
an adjustment of module data is always performed automatically after replacing a module:
The module header is read from the EEPROMs and compared to the contents of the associated binary
file stored on the hard disk. If the header coincides with the data from the binary file it is assumed that
the binary file is an exactly mapping EERPOM and the contents of the binary file is loaded in the RAM.
After replacing a module, these data usually do no longer coincide. The R&S FSP then detects a board
replacement and starts the automatic board adjustment. The complete contents of the new module are
read from the EERPOM and copied to the hard disk of the R&S FSP. The existing calibration data
(results from the latest total calibration) are deleted and the instruments displays UNCAL. Thus, the
R&S FSP must always be calibrated again after replacement of a module (Softkey
CAL TOTAL ).
Frequency response correction
With some boards (see chapter 3, section "Module Exchange") an frequency response correction is
necessary in addition to the automatic adjustment of module data. This correction is performed by
means of a software.
For information when to on perform the frequency response correction see chapter 3, section "Module
Replacement".