Of course, I don't mean that the nature of the 2 tones affect the IMD characteristics of the hardware. Rather, what I meant was: "if one measures IMD with a standard 1:1 amplitude ratio, and then measures again with a non-standard 2:3 ratio, how much would the IMD suppression number change, and in what direction?" I imagine that the answer could be found either by using independently adjustable external audio tone generators, or with a math package.
-----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik Basilier Sent: Sunday, June 12, 2016 2:56 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 IMD vs DC input, using built-in 2 TONE One more question: Assuming that the 2 tones are about 2:3 in amplitude ratio, can anyone say how that would be expected to affect the 3rd order IMD figures? From: Erik Basilier [mailto:ebasil...@cox.net] Sent: Sunday, June 12, 2016 2:53 PM To: 'Elecraft@mailman.qth.net' <Elecraft@mailman.qth.net> Subject: KX3 IMD vs DC input, using built-in 2 TONE I am testing my KX3 / KXPA100 combo, looking at TX IMD and power output depending on the DC power supply characteristics. I am experimenting with a N8XJK Boost Regulator (40A max) as well as an Astron linear supply adjusted down to low voltage, simulating a run-down battery. To judge IMD I use the built-in 2 TONE, mix down sampled output to audio, and feed into Spectrum Lab. When I look at the envelope, its smallest amplitude is about 1/3 of peak. This suggests that the 2 tones are not of equal amplitude. Has anyone else seen this? I downloaded the laterst firmware about a week ago. Thanks, Erik K7TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to ebasil...@cox.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
