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Re: SNR measurements

NX7U wrote:
Once again, Domenico is right on the money--the key is a constant bandwidth 
measurement that includes the noise in the bandwidth.
One other possible source of error is the fact that the output impedance of 
modern receivers is not constant or accurately known. An article I read 
suggested connecting an output transformer in reverse to the speaker 
terminals, say 8 ohms to a known value, R. Connect a 1W resistor of value R 
across the R winding and connect the audio voltmeter across R.

ron w8gus.  

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