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CC2541: CC2541 Occupied Bandwidth test failed on the SRRC Certification.

user6241824
Prodigy 155 points

Part Number: CC2541

Hi ,

On the SRRC Certification. The test lab tested the occupied bandwidth is 3.1494MHz. So it is failed. any suggestion or feedback are highly appreciated.

Is there any way to solve it?

Thanks.

  • 0
    TI__Mastermind 27145 points

    Hi,

    What is the mode (BLE or Proprietary) you are using? If it Proprietary, what is the data rate, Modulation etc?

    What software you are using for testing?

    Are you using SmartRF Studio? If not could you please try with SmartRF Studio?

    Thanks,

    PM

  • 0 in reply to PM
    Prodigy 155 points

    Hi ,

    I using SmartRF studio and set to BLE mode.

    Set as shown: channel 39 、 Modulated 、 tx power = 0dBm

    Thanks.

  • 0 in reply to user6241824
    TI__Mastermind 27145 points

    Hi,

    I suspect you might have some spurs on the board and it is affecting the OCBW.

    Would it be possible to disconnect the On-Board Power supply to the CC2541 chip and fed it externally from a Lab power supply and retest it?

    Did you test at other channels for example Ch-37 and Ch-17?

    Did we review your design?

    If not could you please post Schematic in PDF and PCB Layout in Gerber format for review?

    If you think your design is confidential then you can send me the Friend request. After I accept your Friend request then it open up a private channel then you can send me your design for review.

    Thanks,

    PM