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CC2541 Proprietary Mode - Different modulations - link budget

AM12
Intellectual 300 points
Other Parts Discussed in Thread: CC2541

Hi,

For CC2541 proprietary mode the following modulations are available.

GFSK_250kbps_160khz
GFSK_1Mbps_160khz
GFSK_1Mbps_250khz
GFSK_2Mbps_320khz
GFSK_2Mbps_500khz
MSK_250kbps
MSK_500kbps


Is there any difference between these modulations regarding the link budget and if positive which has the best link budget? Any other advantages/disadvantage for each of these modulations?

Thank you

  • 0
    TI__Mastermind 27145 points

    Hi,

    Yes, the receiver sensitivity improves with the reduction of Receive channel filter bandwidth, which in-turn improves the link budget.

    Higher data rate and Higher deviation requires higher Rx fliter bandwindth, which degrades the sensitivity of the receiver.

    As per the data sheet,

    MSK-250KBPS has -99dBm Receive sensitivity

    GFSK-250KBPS has -98dBm Receive sensitivity

    So, either of the above modes can be used to get a best link budget.

    Please refer to the RF Receive section of the data sheet for further details.

     

    Thanks,

    PM