[Elecraft] OT: Amplifier's close in IMD product test

[w6fvi]

And a great source for those two tones is an Elecraft 2T-Gen!

Brian - W6FVI

N2EY at aol.com wrote:

>In a message dated 2/14/06 6:54:20 PM Eastern Standard Time, 
>kg0wx at hotmail.com writes:
>
>
>  
>
>>Does anyone know how to test an amplifier, or for that matter a 
>>transceiver, 
>>for close
>>in IMD products? What kind of equipment is needed?
>>
>>    
>>
>
>That's what a "two-tone" test is for. 
>
>The RUT (Rig Under Test) is set up for SSB operation, and two pure sinewave 
>nonharmonically related audio tones in the audio passband are fed into it. 
>Output is examined with a spectrum analyzer.
>
>A perfect rig would emit two carriers and nothing else. Imperfections 
>(odd-order IMD products) show up as carriers besides the two desired ones. 
>
>73 de Jim, N2EY
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