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Last Post 09 Dec 2016 07:33 AM by  Adam Ford
Bluetooth frequency setting
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Hannibal Bauliah
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Posts:13


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06 Dec 2016 12:52 PM

    Hi,

         We sell our products in USA and Europe. I believe the bluetooth operating frequency varies between US and Europe.  Could you please let me know if I can set the frequency range for the blue tooth module so that our product does not operate in a frequency that is set by the regulatory bodies?

        I would appreciate if you could provide me an api or driver call to set the bluetooth frequency.

     

    Regards,

    Hannibal

    Hannibal Bauliah
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    Posts:13


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    06 Dec 2016 01:19 PM

    Typo in the previous mail, The correct sentence reads like..

         Could you please let me know if I can set the frequency range for the blue tooth module so that our product operate in a frequency that is set by the regulatory bodies?

    Adam Ford
    Advanced Member
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    Posts:794


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    06 Dec 2016 01:26 PM
    Depending on the models they have different chipsets. Are you inqiring about the OMAP35 SOM-LV, DM37 SOM-LV or DM37 Torpedo + Wireless?


    The DM37 Torpedo + Wireless is the only SOM that has has the FCC and IC certifications and test reports for Europe as well.

    adam
    Hannibal Bauliah
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    Posts:13


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    06 Dec 2016 01:47 PM
    Hi Adam,
    Thanks for a quick response.
    I am using DM37 Torpedo + Wireless. Can we use the certificate obtained by logicPD for our certification process? if so how can we obtain the logicPD's certificate.
    I would also like to know if the chip can auto-magically figure out which country it is operating in or is there any API or device driver interface to set the frequencies?

    Thanks,
    Hannibal


    Adam Ford
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    Posts:794


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    06 Dec 2016 02:16 PM
    Hannibal,

    I know one of our engineers worked with your company to help lower the WiFi power for SAR limits, but he is out today, so forgive my question.

    Are you using any of the antennas that we certified for use int he US? If so, you should be able to use our FCC ID. If not, you'll have to recetify. Our FCC ID is YKP 1024119

    You can get the certificates from FCC located here: https://www.fcc.gov/oet/ea/fccid

    From my understanding the Bluetooth operates over the same band within a few channels. I know we tested the low medium and high channels for classic BT and BLE for both Europe and USA. To my knowledge, there isn't any special regulatory database file like what exists for WiFi. It should just work.


    adam
    Hannibal Bauliah
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    Posts:13


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    06 Dec 2016 04:22 PM
    Hi Adam,
    Thanks a lot for the quick response. I talked to our hardware engineer and he confirmed that we used the antenna suggested by LogicPD. I believe this helps us not to worry about the power and emission.
    The bluetooth Specification revision 1.0A suggests the following

    USA & Europe(except france & spain) 2.400-2.4835 GHz.
    France 2.4465-2.4835 GHz
    Spain 2.445-2.475 GHz.
    Japan 2.471-2.497 GHz

    Even thought there is a fair amount of common frequency range between all these countries, do you think we can use the US frequency in all other countries without any certification issue?

    Thanks,
    Hannibal
    Hannibal Bauliah
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    New Member
    Posts:13


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    06 Dec 2016 04:30 PM
    Hi Adam,
    I tried to access the FCC site you suggested and entered the FCC ID you suggested and I get the following error message

    "Product Code is invalid. Please conform to maximum length of 14 and allowed characterset of 'Alpha Numeric and hyphen' "

    Regards,
    Hannibal
    Adam Ford
    Advanced Member
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    Posts:794


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    07 Dec 2016 06:32 AM
    We have not tested or approved the device for use in Japan and they have a certification process. If you'd like I can have an account manager contract you to discuss getting the module tested for Japan.

    We also have a technical file that shows we meet the CE requirements for Europe which should cover France and Spain. I cannot share the technical file freely, but I can have an account manager also work with you on what is required to get you what you need.

    Let me know if either of those options are of interest to you.

    adam
    Adam Ford
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    Posts:794


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    07 Dec 2016 06:35 AM
    You'll need to type YKP into the Grantee Code and 1024119 into the Product code on the FCC page, and it should work for you.


    adam
    Hannibal Bauliah
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    New Member
    Posts:13


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    07 Dec 2016 02:58 PM
    Hi Adam,
    Thanks for the response. We are not planning to enter the Japanese market in the near future so we don't have to worry about the certification in Japan.
    If you could answer me regarding my frequency question it would be helpful to plan our development activities.

    Thanks,
    Hannibal
    Adam Ford
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    Posts:794


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    08 Dec 2016 07:03 AM
    I am not sure I understand the question.

    We tested the Torpedo + Wireless Blueooth for both US and Europe. Both tests of tests used 2402, 2440 and 2485 MHz and we don't have a mechanism to differentiate between US and Europe, because they use the same power levels.


    adam
    Hannibal Bauliah
    New Member
    New Member
    Posts:13


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    08 Dec 2016 05:43 PM
    Hi Adam,
    Could you please tell me how you made the bluetooth & wifi stack operate at the specfic frequency like 2402, 2440 and 2485 MHz ? Is there any interface available to the app developer to set the frequency of the bluetooth controller?
    Regards,
    Hannibal
    Adam Ford
    Advanced Member
    Advanced Member
    Posts:794


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    09 Dec 2016 07:33 AM
    We followed TI's guidelines set in this document: http://processors.wiki.ti...71_.2B_ARM_Platforms

    Toward the bottom,in Software Setup, you'll see a series of instructions that force the Bluetooth radio into the various test modes for regulatory testing and their corresponding waveform pictures.

    While the site states WL127x, it works for the wl128x as well.

    adam
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