5-8.
YO LOOP ADJUSTMENTS
Reference
Performance Test:
None
Service Section:
Sweep Generator
-
YO Loop
Description
The YO Loop Adjustment procedure adjusts the sampler drive circuitry and the IF gain.
The YO Loop gain and phase margin adjustment selects the value of resistor A49R18 to place the YO
Loop gain and phase within specified limits. This prevents the YO Loop from oscillating while still
providing sufficient gain in the YO Loop.
NOTE
The YO frequency adjustment in Paragraph 5-28 must be completed
before these adlustments are made.
SPECTRUM ANALYZER
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Figure 5-18.
YO Loop Adjustment Setup
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HP 8340B/41B
Adjustments
5-43