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I'd like details on the modulation scheme used by STM32wb55 BLE chip for ETSI EN 300 328 approval.

RWill.4
Associate

‎2021-08-02 05:33 AM

Hi,

I'm taking an STM32wb55 based PCB through CE testing. The test house require the following information which I haven't got.

Modulation scheme

Duty cycles

Channel hopping

Worst case operational modes

Transmit operational modes

Medium Utilization

Any information would be helpful.

Rhydian

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Remi QUINTIN
ST Employee

‎2021-08-12 05:51 AM

What type of info regarding Duty Cycle are you looking for?

>Worst case operational modes

Dp you mean in a noisy environment with blockers inside and outside the BLE band?

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Remi QUINTIN
ST Employee

‎2021-08-13 12:36 AM

For the CE certification for BLE devices, you must be compliant with EN 300 328 V2.2.2 :

Modulation scheme GFSK modulation width 2MHz

Duty cycles -> 98%

Channel hopping No -> DSSS

Worst case operational modes 2MHz

Transmit operational modes Permanent with modulation

Medium Utilization No

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