Example does not fit to the example

[goekce]

I am not an expert in signal modulation.

Would it not be a better example if

1. $∆ f$ would be equal (for best noise tolerance)
2. the values would fit the following figure?

PySDR/content/digital_modulation.rst

Lines 241 to 244 in 3583d80

	1. 1.2005 GHz
	2. 1.2010 GHz
	3. 1.1995 GHz
	4. 1.1990 GHz

Next figure:

My proposal:

1. +100 kHz
2. +300 kHz
3. -100 kHz
4. -300 kHz

[777arc]

Sorry for the delay, 100% right it should be equal delta-f, not sure how that happened, I'll fix it as part of an upcoming larger PR