![]() ![]() ![]() The distortion will result in spurs (spurious signals) at 13.8 Mhz and 14. That only happens in an ideal world.Īll real world amplifiers, mixers, even filters show distortion. If you feed the output of the TTG to an amplifier, you expect just those two frequencies to show up in the output. ![]() They are have a difference of 160 Khz between them. Let’s imagine that the two crystals frequencies of your two tone generator (let’s call it TTG from now on) are 14 Mhz and 14.16 Mhz. The combined output is filtered to remove the harmonics. Both the oscillators are well isolated from each others output and then mixed together in a 6 db hybrid coupler. The principle is very simple, two crystal oscillators generate two signals that are close to each other. A two tone test generator is a very useful, simple circuit that you can build to test your circuits for distortion. ![]()
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February 2023
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