Discussion
Arrange these alignment steps in the order they should be carried out.
1. Align the intermediate frequency transformers at their fixed frequency
2. Set the oscillator's range with the padder at the low end
3. Trim the oscillator and preselector at the high end
4. Check tracking at a mid-band frequency
Select the correct sequence.
Answer: B
The order is 1, 2, 3, 4: fix the intermediate frequency first, then the low end with the padder, then the high end with the trimmer, then verify in the middle. Aligning the front end against an unaligned intermediate frequency strip would build the error in permanently. Establish the fixed reference, adjust the extremes, verify between - a sequence that recurs whenever two adjustments interact at opposite ends of a range.
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