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two tone test2 - PreciseRF
https://preciserf.com/wp-content/uploads/2012/03/Appnote-2-Two-Tone-Tests2.pdf#:~:text=The%20Two%20Tone%2C%20third-order%20intermodulation%20distortion%20%28IM%29%20test,and%20observing%20the%20modulation%20envelope%20with%20an%20oscilloscope.
two tone test2 - PreciseRF
https://preciserf.com/wp-content/uploads/2012/03/Appnote-2-Two-Tone-Tests2.pdf
The Two Tone, third-order intermodulation distortion (IM) test measures the degree of nonlinearity of an electronic device with a definable dynamic range, such as an amplifier . Nonlinear RF Amplifiers may spread signals into adjacent channels, and or frequencies,
SINGLE SIDE BAND TWO TONE TEST - VK6YSF
https://vk6ysf.com/ssb_2tone_test.htm
The standard two tone test applies two audio frequency tones to the transceiver microphone from a quality sinusoidal generator at approximately 700 and 1900Hz. The exact audio frequency is not critical other than they cannot be harmonically related and should be sufficiently separated with in the audio band pass.
ON6ZQ | SSB Two-Tone Test
https://www.on6zq.be/w/index.php/Scilab/TwoToneTest
Standard two-tone (700 and 1900 Hz) .wav file for testing of SSB transceivers and linear amplifiers. The mesure of linearity of SSB transceivers and linear amplifiers often requires a standard two-tone (700 and 1900 Hz) audio source. Linearity impacts both SSB fidelity and the amount of SSB splatter that causes adjacent channel interference.
Two Tone Test Generator - Pacific Antenna
https://qrpkits.com/twotonetest.html
Two Tone Test Generator Description Our Two Tone Generator kit provides two non-harmonic, sine wave signals for testing audio circuits Outputs of approximately 700Hz and 1900Hz and the combination of these two signals. Adjustable amplitude and balance. Designed for testing audio circuits, especially voice and digital mode radios.
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