RF spike in BCM20713

[GiMa_1343986]

Dear community,

I use a BCM20713 in a product. During bluetooth test performed in a shielded chamber with a Bluetooth protocol analyzer I found that in more or less 20% of products there are a spike in the BT modulation in time domain. This noise makes that you are unable to perform the measurement properly. In particular the instrument says me that the packet is incorrect.

In detail, I'm try to performs a transmit test from the DUT to the instrument using EDR BT technology.

the spike seems happens at the transmitter turn-on.

In annex a snapshot of that.

Could you please let me know what can generate this behaviour and how I can try to solve it?

thanks a lot,

BR,

Giordano

[MichaelF_56 · Accepted solution]

I am not familiar with that part number.

Currently, only the BCM20732/36/37 are supported here in the Bluetooth forums.  For all other devices, you will need to work with the local/regional Cypress team to setup support.

[Anonymous]

Hi,

Did you make sure that the schematics and layout guidelines for RF are properly followed? Do you have any high current traces near your RF Trace?

Regards,

- Madhu Sudhan