Re: Two Tone Generator #two-tone


He used a digital oscilloscope with FFT capability.  Claims that with adjustment, harmonic content is below -50 dB.




From: [] On Behalf Of bobolink
Sent: Monday, April 1, 2019 7:16 AM
Subject: Re: [BITX20] Two Tone Generator #two-tone


The often neglected requirement of a two tone generator is that it should have very very low distortion of its own. 

I don’t get QEX but wonder what method he used to measure the distortion of his circuit. I think the HP334A was useful for that (THD I guess). They still want quite a high price for them on eBay.

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