7-16
Adjustments
Manual Adjustments
AM Level: FE (8648B/C/D Only)
Not used for serial prefixes ≥ 3847A/3847U.
Description
This adjustment performs the AM Level adjustment on the frequency extension module by
connecting the function generator and the DVM to motherboard connector J31.
This adjustment performs the two adjustments to the output board that require the use of
the voltmeter. It sets up the multiplexer on the output board to measure dc voltages while
the potentiometers are being adjusted.
Required Test Equipment
• Function Generator
•DVM
• J31 Test Point Extender (refer to the “Test Point Extender” section at the front of this
chapter)
Procedure
Figure 7-14. AM Level: FE Test Setup 1
Figure 7-15. AM Level: FE Test Setup 2
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