Rohde & Schwarz SMU200A - Replacing the RF Attenuators A1300, 1320 and A2300; Installing the New RF Attenuator; Removing the RF Attenuator

R&S SMU200A Module Replacement
1007.9845.82 3.63 E-6
Replacing the RF Attenuators A1300, 1320 and A2300
(See chapter 5, spare parts list 1141.2057.01, AA1300, A1320 and A2300, parts list and drawing
1141.2005.01)
The attenuator(s) is (are) fitted in the side chamber with the fans.
Removing the RF Attenuator
 Remove instrument cover 1.
 Remove options B30, B31, or B32 in case they are installed (see below). The attenuator of path A is
fitted at the bottom, of path B at the top side.
Bottom side:
 Loosen the 4 screws (2 x 0041.1630 and 2 x 1148.3271) fastening the attenuator to the chassis (one
of them is accessible through a hole in the motherboard).
Top side:
 Loosen the 4 screws (4 x 1148.3271) fastening the attenuator.
 Place the instrument onto the left side and unscrew the RF cables at the input and the output of the
RF attenuator.
 Unplug the flexible ribbon connection from the attenuator. Now the attenuator can be removed.
Installing the New RF Attenuator
 Proceed in the reverse order as described under "Removing the RF Attenuator".
 After replacement, perform the internal and external adjustments according to chapter 2,
“Adjustments”).