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RF Section Troubleshooting
RF Section Description
The RF section is comprised of the following major assemblies:
— A9 Input Attenuator A 
— A10 Input Attenuator B
— A11 Low Band Switch Assembly
— A12 YTF Preselector
— A14 L.O. Synthesizer Assembly
— A13 RF Front End Assembly
— A15 Front End Control Assembly
— SW1 and SW2 - Option MPB Microwave Preselector Bypass
NOTE SW1 and SW2 and their associated cables are the microwave preselector 
bypass hard ware. This hardware is present in analyzers containing any or all 
of the following three options: 
• MPB, Microwave Preselector Bypass
• B40, 40 MHz Analysis Bandwidth
• DP2, Digital Signal Processing & 2 GB Capture Memory
However, if there is no license for option MPB, the hardware will default to 
the non-bypassed path (high band microwave signals will be routed through 
the A12 YTF Preselector). If a license for Option MPB is present, it will be 
possible to bypass the A12 YTF Preselector.