[Elecraft] Analog vs. Digital Front Ends

[Mike Markowski]

Don,

The broadband jammer is the most traditional of all in electronic 
warfare.  If a receiver can withstand substantial AWGN (additive white 
Gaussian noise), chirp, and CW jam, then that's the receiver for me.  :-)

73,
Mike ab3ap

On 09/15/2015 06:51 PM, Don Wilhelm wrote:
> I am going to go off on a wild tangent as a method of testing all
> receivers for the ability to copy signals in the midst of very crowded
> band conditions and/or the presence of noise.  Whether those receivers
> have analog front ends or an ADC.
>
> An extremely crowded band could be simulated by broadband noise.
> So take a medium strength single signal (say S-5) and inject it into the
> receiver under test.
> Now add a low amplitude broadband noise signal, and increase it until
> the signal is buried in the broadband noise.
>
> The receiver that can withstand the greater broadband noise level while
> still recognizing the single signal "wins".
> That says nothing about the overload of the ADC for those receivers that
> put the ADC at the antenna - that is something for other test parameters.
>
> 73,
> Don W3FPR