Keysight NFA Series Noise Figure Analyzers Service Guide 407
Assembly Replacement Procedures
RF Area (N8973B, 74B, 75B)
3. Refer to Figure 15-13. From the bottom of the instrument, remove the four
screws (2). The YTF Preselector can now be removed from the chassis.
Figure 15-13 YTF Preselector Screws
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