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CC430 + PCB antenna CE marking

Claudio Laddaga
Prodigy 245 points

Hello everybody,

we developed a wireless sensor using a CC430 SoC and a PCB antenna, the meander depicted in your design notes.

We are now going into the CE marking phase.

My question is, knowing that the CC430 is already compliant with the harmonized norm EN 300-220: do we need anyway to make the EMC tests in order to check spurious emissions and so on as required by the EN 300-220? 

May I neglect those tests considering that the CC430 already complies the harmonized norm and, for this reason, the 1999/5/EC directive (R&TTE directive)?

Thanks in advance!

Regards,

Claudio

  • 0
    TI__Guru**** 317180 points

    No. The CC430 itself is not compliant, it's the EM including the CC430 and the antenna that is. You have to certify your product in the casing including the antenna.

  • 0 in reply to TER
    Prodigy 245 points

    Hi TER,

    thanks, as usual, for your replies!

    I thought that, considering that the CC430 is "suited for compliance with EN 300-220" as it is written in the DataSheet, I could only produce a technical document explaining that we are using devices already compliant and we are only integrating them.

    So, does this mean that we are forced to attend all the tests explained in EN 300-220 into a certified Laboratory? Is this mandatory or we can simply produce a document, explaining all technical choices to fulfill the harmonized norm, as I said before?

    Thanks!

    Claudio

  • 0 in reply to Claudio Laddaga
    TI__Genius 13620 points

    Yes, you will need to perform all the required tests for your product to be compliant.

  • 0 in reply to M
    TI__Guru**** 317180 points

    "suited for compliance with EN 300-220" tells the user that it is possible to design a EN 300-220 compliant system using CC430.

    If a system is compliant or not is very dependent on the register settings and the layout. By doing a poor PCB layout and/ or not following the recommended BOM/ register settings the probability for having a system that will fail EN 300-220 is fairly large. 

  • 0 in reply to TER
    Prodigy 245 points

    Ok, now I have a clearer idea.

    Anyway I followed all hints suggested in your Design notes, like using the Johanson Balun Filter, and I used almost the same layout used in the Evaluation Module.

    That's why I wanted to know if I could assume the fulfillment of EN 300-220, using all these precautions!

    But from your replies I see there is no way to avoid spending further time and money in these EMC tests! Isn't it?

    If possible, could you please help me in understanding which EMC tests will I have to execute on my system?

    Thanks!

    Claudio

  • 0 in reply to Claudio Laddaga
    TI__Guru**** 317180 points

    If you have followed the ref design etc you can assume that you will pass. Before sending it for testing you should do conducted testing (output power, harmonics, spurious) to ensure that you have some margin.

    But you have to do the testing. For which tests etc I would recommend contacting the lab you are planning to use to get their recommendations on how/ what to test and the type of firmware you need for testing.

  • 0 in reply to TER
    Prodigy 245 points

    Ok TER, thanks!

    What do you mean for "Before sending it for testing you should do conducted testing (output power, harmonics, spurious)"?

    For the output Power I am for sure compliant because I am not using any amplifier and respecting the maximum power related to the band I am working in setting correctly the RF registers.

    Regarding harmonics and spurious may I use the MSP-SA430-SUB1GHZ as a reference for checking those things?

    In conclusion I want to ask if you have a CE (EN300-220) certification for the CC430 module. Would you please attach it to me?

    Thanks.

    Claudio

  • 0 in reply to Claudio Laddaga
    TI__Guru**** 317180 points

    This advice is only valid if you have access to a proper spectrum analyzator and are able to do accurate measurements. The MSP-SA430-SUB1GHZ is just an indicator and not accurate enough to tell you how far you are from the limits.