Problem with harmonic mode? about rpitx HOT 3 CLOSED

Here is a more detailed explanation :

By default, modulation output is done with PWM engine. It outputs a 32bit pattern which is mastered by the clock. The pattern is 101010...in order to simulate a cycle. It means that it outputs a frequency/2 (compared to clock). That's explain the /2.

There is an other mode (prefered) which use directly the clock output :add -c 1 to the command line and use GPIO 4 (Pin 7 of header). Signal is not divided by 2 and is cleaner than with PWM.

Hope that it answers your question. Feel free to ask other details if needed.

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I understand the factor of 2, which is actually a multiplication by 2. I am saying that instead of dividing by 3 when using the 3rd harmonic, the program appears to divide by 3^2 = 9. For example, when 720 MHz is requested, rather than generating a 240 MHz square wave, it generates an 80 MHz square wave. This is due to dividing by the HarmonicNumber twice.

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Yes there is something weird..Have to check the code , something suspect in calculating. Thx for pointing this bug.

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