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On 16/03/2021 21:31, Andy TALBOT wrote:
non-linear ramping is well defined for that DDS, the ramp control
can be changed and timed on the fly as I said before. Even if the
ramp is divided into a few segments with different slopes it will
probably be better than trying to tweak the DDS in single
frequency mode at exactly the right intervals to generate anything
like a Gaussian filter. In fact I suspect a linear ramped-FSK will
be better than any attempt at a piecemeal generation a Gaussian
filtered MFSK, certainly much easier to generate using the DDS
chip's facilities for it.