Keysight N5247-60103 Installation Note page 18

Step 13. Assemble the Port 1 and Port 4 Step Attenuators
Refer to Figure 4 for this step of the procedure. New parts are listed in Table 1 on page 7. Use a T-10 TORX driver
to tighten all screws.
Figure 4 Port 1 and Port 4 Step Attenuators Assembly
Installation Note N5247-90103 17