Rohde & Schwarz FSP3 Service Manual page 193

R&S FSP
Normal action
LC Filter I and XTAL Filter
Selftest Detector B (see block diagram)
The level measurement is performed with wide
and narrow bandwidths
Subsequently, it is additionally measured via the
crystal filter. If the LC filter does not work properly,
the measurement of the crystal filter is not
performed.
1164.4556.82
If the level adheres to the tolerance, a defective
CAL_Amp may have caused the error. The setting
ranges of the CAL_Amps are tested during the
selftest, later.
The selftest passes under service level 1.
of the LC filter.
ERROR!
IF Board: LC Filter-1/2 wide
XTAL Filter not tested
ERROR!
IF Board: LC Filter-1/2 narrow
XTAL Filter not tested
ERROR!
IF Board: XTAL Filter
3.89
Error and error cause
Note, whether the result file contains any error
messages concerning the CAL_Amps. If no
CAL_Amp error occurred, the CAL_Amps will
be set incorrectly. The EEPROM data in the
frontend are obviously incorrect (cf.
troubleshooting instructions for the frontend)
The IF filter board must be replaced in all
cases.
Troubleshooting
E-1