Rohde & Schwarz 1164.4391.03, Service Manual

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Module Replacement R&S FSP
1164.4556.82 3.52 E-1
Replacing RF Extension 40 A162; R&S FSP40
(See chapter 5, spare parts list, item 2235, and drawing 1093.8584.)
The board is installed on the 40 GHz converter unit.
Removing RF Extension 40
Remove 40 GHz MW converter unit (141).
Note: See description "Replacing MW Converter Unit A160".
Disconnect all cables from the extension (2235).
Remove the two module covers by undoing the screws from the bottom of the module.
Undo 8 screws with washers (2240) from the bottom side of the extension (2235).
CAUTION The extension (2235) may fall out.
Remove extension 40 (2235) perpendicularly to the PCB.
Note: The extension is still connected to the PCB with contact pins.
Installing RF Extension 40
Plug extension 40 (2235) perpendicularly into the PCB.
Note: The extension is still connected to the PCB with contact pins.
Refasten 8 screws with washers (2240) to the bottom side of the extension (2235).
Fit the module cover onto the top of the converter unit (positioning by means of adjusting pins). Turn
40 GHz converter unit upside down, fit module cover to the bottom side and refasten all screws.
Refasten all cables to the extension (2235).
Completing the Instrument and Frequency Response Correction
Put the 40 GHz MW converter unit (141) back into the instrument.
Note: See description "Replacing MW Converter Unit A160".
Execute frequency response correction software R&S FSP-FRQ.EXE.
The software is located on the Gloris server.
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Test setup according to menu item "Schematic" (connect external reference).
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Check IEC/IEEE addresses and configuration of instruments.
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Press the Autoselect button and perform the measurement with Run.
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The frequency correction of the YIG filter is performed under item YIG.
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After calibration, the frequency response is corrected over the entire frequency range.
Create a backup of the EEPROM data (see chapter 2, section "Adjustment of Module Data").