Part Number: CC110LEM-433-RD
433M, 250kbps
If I config the "Deviation" setting to 127kHz/114kHz/101kHz, the actual Fdev in spectrum is not changed. See the picture below.
Why?
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Part Number: CC110LEM-433-RD
433M, 250kbps
If I config the "Deviation" setting to 127kHz/114kHz/101kHz, the actual Fdev in spectrum is not changed. See the picture below.
Why?
If you look at a wider span you will see that the spectrum changes with deviation (for the same data rate). The spikes you see in your plot are set by the data rate. That is, if you keep the deviation and change the data rate the spikes will move. To convince yourself that the spectrum does change you can look at a wider span, measure the 99% occupied bandwidth, or look at the signal in the time domain (frequency vs time) and not amplitude vs frequency as in your plot.
I find a way to measure the Fdev using SmartRfStudio: