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AGC signal/noise question...
i3hev, mario held wrote:
Reg Edwards wrote: If an amplifier incorporates a noise generator... ... then it is no longer just an amplifier. .... ... so, we must conclude that amplifiers do not exist! of course, there is no real amplifying device which does not generate noise; or, more precisely, there is no non-noisy real device at all If you choose not to call "amplifier" a device which amplifies signals if it has a non-unity noise figure, please feel free to do so - we live in a (at least partially) free world... but you will be alone! ) Regards! Don't be too hasty. Reg has verified he's got some coax that's much lower loss than anyone else can buy (it actually meets the predictions of his coax loss program), and has verified it by measuring it many times. Maybe he also has a secret source of noise-free amplifiers. You never know. Roy Lewallen, W7EL |
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