CC1200: Bandwidth by a 2-GFSK Modulation (Datarate 9,6 bps / Deviation 3,9 kHz)

Alex Wolf41

Other Parts Discussed in Thread: CC1200

Hallo,

I have maesured the Bandwidth of the output signal of a CC1200, by 868 MHz, with approximadly 10 kHz. Is this correct or are my konfigurations 9,6 bps and 3,9 kHz frequency deviation not rigth? I use the 2-GFSK Modulation.

over 10 years ago

0 Sverre over 10 years ago

TI__Mastermind 39860 points

95% occupied bandwidth (OBW) will be approx 10 kHz. 99% OBW will be approx 13 kHz

0 Alex Wolf41 over 10 years ago in reply to Sverre

Prodigy 50 points

Ok, thank you for your answer. But there is one thing that don't understand. If I try to calculat the bandwidth with the carson rule the result approx. 20 kHz. Can anyone explain me which formula I have to use?

0 TER over 10 years ago in reply to Alex Wolf41

TI__Guru**** 317180 points

Carson's rule is fairly accurate for FSK modulation but due to the shaping GFSK use the signal bandwidth for this type of modulation is less. Matlab or similar could be used to find the bandwidth using other modulations than FSK.

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CC1200: Bandwidth by a 2-GFSK Modulation (Datarate 9,6 bps / Deviation 3,9 kHz)