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Module Replacement
R&S FSP
1164.4556.82 3.50
E-1
Replacing 40 GHz YIG Unit A161; R&S FSP40
(See chapter 5, spare parts list, items 2215, 2217 and drawing 1093.8584.)
The board is installed on the 40 GHz converter unit (141).
Note:
Only the YIG units (with YIG filter, cable, sheet metal part) are replaced. The interface is
thus always the same when using other YIG filters.
Removing 40 GHz YIG Unit on MW Converter
Remove 40 GHz converter unit (141).
Note:
See description "Replacing MW Converter Unit A160".
Remove the two module covers by undoing the screws from the bottom of the module.
Disconnect cable W2 from RF extension (2235) and cable W5 from diplexer (2225).
Disconnect cable from YIG filter at X4.
Undo 4 countersunk screws (2220).
Remove complete YIG unit (2215).
Installing 40 GHz YIG Unit on MW Converter
Put the new YIG unit (2215) onto the PCB.
Fasten YIG unit with 4 countersunk screws (2220).
Screw on cable W2 to RF extension (2235) and cable W5 to diplexer (2225).
Connect cable from YIG filter at X4.
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.
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.
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