On Thu, Jun 20, 2024 at 09:09 PM, Andy G0FTD wrote:
I thought that a true two tone generator require two absolutly
independant audio sources to be present.
If you took a software 2 tone generator, or a switched synth then
at any monent in time there's actually one one of the tones present.
To the ear, it would appear as two tones but in reality it's just one
tone present at a moment in time - not what require.
The Soundcard Scope oscillators feed the left and right channels of the stereo soundcard separately.
I simply add them together with a resistive network, and it seems to work OK, providing I don't overdrive the transmitter audio input.
Regards,
Martin
