Wayne Parham Messages: 18793 Registered: January 2001
Illuminati (33rd Degree)
I did that for a while, and then decided to create a dual-tone signal that combined the 315Hz sine with the 10kHz sine. I monitored the output with Daqarta's spectrum analyzer so I could see both the 315Hz content and the 10kHz content. That made it easier to set the levels to match. Then as a "sanity check," I used single-frequency sines of 315Hz and 10kHz to make sure the levels were matched when a pure sine wave was presented.
Pay attention to the relative amplitudes of the signals below at 315Hz and at 10kHz:
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