aaron_do
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Hi M.G. Rajan,
your responses are always really insightful.
Anyway, are you saying that, for example, rather than have a noise figure meter, you'd want a powerful oscilloscope/spectrum analyzer...i.e. versatility over simplicity? That is understandable if you are someone who really knows how to interpret raw data. I think though that many engineers are simply given a set of specs that they need to meet without knowledge of the system.
Also systems are partioned in the way we design them and different circuits in the same system may need completely different inputs and specs. For example and LNA may need the desired FSK signal as well as a bunch of unwanted signals of specific frequencies and amplitudes as its input, while the input to a VGA might be much cleaner. FOMs like NF, Phase Noise, IIP3 and image rejection ratio allow us to separate the general problem of unwanted random signals into a base set of problems which can be individually tackled.
cheers, Aaron
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