Quote:
Originally Posted by regenfreak
I am not interested in making sweeps from antenna input to IF out because my FM IF strips use complicated staggered tuning (in contract to synchronous tuning in mono FM or AM IF strips) to max out the stereo fidelity. The IF responses will mask out the misalignment issues in the individual single and double tuned RF front end stages. It is easy to do frequency sweep of IF stages but it is hard to do visual sweep on the FM front ends...
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I didn't mean the output of the IF strip, but the output of the IF transformer of front end, and assumed it having a smaller bandwidth than that of preceding stages. You could get a meaningful picture, improving the resolution of the sweep by adding another IF filter (of high Q) past this IF transformer.
And sorry, I had a typical transistor-oriented IF secondary impedance ~100-200 Ohm in my head.