Keysight NFA Series Noise Figure Analyzers Service Guide 451
Assembly Replacement Procedures
Motherboard Assembly
6. Replace the Front Frame Assembly. Refer to the “Front Frame Assembly”
replacement procedure.
7. Replace the Midplane assembly. Refer to the “Midplane Assembly”
replacement procedure.
8. Replace the L.O. Synthesizer assembly. Refer to the “L.O. Synthesizer
Assembly” replacement procedure.
9. Replace the Front End Control assembly. Refer to the “Front End Control
Assembly” replacement procedure.
10.Replace the AIF/DIF assembly. Refer to the “Analog I.F. (AIF)/Digital I.F.
(DIF) Assembly” replacement procedure.
11.Replace the power supply assembly. Refer to the “Power Supply
Assembly” replacement procedure.
12.Replace the CPU assembly. Refer to the “CPU Assembly” replacement
procedure.
13.Replace the reference assembly. Refer to the “Reference Assembly”
replacement procedure.
14.Replace the top brace and reference bracket. Refer to the “Top Brace”
replacement procedure.
15.Replace the rear panel. Refer to the “Rear Panel” replacement procedure.
16.Replace the instrument outer case. Refer to the “Instrument Outer Case”
replacement procedure.