I recall using Rhode & Schwarz test-sets for filter
alignment, also Tektronix tracking-generator and
spectrum analyzer combos. Further back I recall
similar devices called wobbulators used for IFs.
- when was the technique of using wideband noise
followed by audio or video spectrum analysis first
described?
- ditto, for amateur radio applications?
I know we must all thank N0SS for suggesting this
tecnique using the Spectrogram program for K2 filter
& BFO setting, and also for providing a circuit and
pcb for a suitable noise generator. -- A LOT better
than the other methods I mentioned above.
73, Steve GU3MBS.
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