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CC2540 dwell time test

jerome d.
Expert 1325 points
Other Parts Discussed in Thread: CC2540

Dear all
We are passing tests for Korea, our product is based on a CC2540, it is BLE only.

We are checking regulatory based on ETSI EN 300 328 

The laboratory requires testing dwell time on CC2540, and it seems they cannot observe this dwell time when triggering frequency hopping test using 

HCI_EXT_ModemHopTestTxCmd ()

The call to the above function works well, anyway they mention they cannot observe dwell time.

If anyone has experience with the above issue, I would be happy to read your guidelines.

Thanks !

Jerome

  • 0
    TI__Guru** 105180 points
    Hello Jerome,

    Can you specify the exact requirement within the ETSI specification that is requiring the dwell time? Also, please note the following on the "How to Certify" article on the TI BLE Wiki:

    EN 300 328 - radio equipment testing of data transmission equipment operating in the 2.4GHz ISM. Note that BLE does not classify as FHSS under this ETSI specification and instead classifies as “other type of wideband modulation” under Sec 4.2.1 of the V1.8.1 specification. Relevant test requirements for BLE are defined in Sec. 4.3.2.

    Best wishes
  • 0 in reply to JXS
    Expert 1325 points

    Hi
    Thanks for your answer.
    The Korean laboratory answered your question, they highlighted the following in ETSI EN 300 328 V1.9.1 (2015-02) 

    5.3.2 RF output power, Duty Cycle, Tx-sequence, Tx-gap, Medium Utilization 

    5.3.2.2.1.2 RF Output Power 

    The test procedure shall be as follows:

    Step 1:

    • Use a fast power sensor suitable for 2,4 GHz and capable of minimum 1 MS/s.

    • Use the following settings:

      • -  Sample speed 1 MS/s or faster.

      • -  The samples shall represent the RMS power of the signal.

      • -  Measurement duration: For non-adaptive equipment: equal to the observation period defined in clause 4.3.1.3.2 or clause 4.3.2.4.2. For adaptive equipment, the measurement duration shall be long enough to ensure a minimum number of bursts (at least 10) are captured.

        NOTE 1: For adaptive equipment, to increase the measurement accuracy, a higher number of bursts may be used. 

    Does this make sense to you ?
    Thanks
    Jerome

  • 0 in reply to jerome d.
    TI__Guru** 106705 points
    Hi Jerome,

    Complex requirements such as dwell time, tx-gap, etc do not apply to devices with output power below 10 dBm (as you can see in chapter 4). So for CC2540, you can simply program the radio to output a continuous signal and measure the static (maximum) levels.

    Cheers,
    Fredrik
  • 0 in reply to Fredrik K
    Prodigy 30 points
    Hi Fredrik,

    The Korean lab has checked your answer above. Here was the lab's reply :
    But he mistake our question is number of burst
    Also he correct the answer
    But our test point is number of burst
    Your product dont have bursts
    You have to make bursts
    It is korea test rule

    Do you understand the questions? or can you pls introduce us any local support in South Korea, who can speak Korean to the lab directly? Thanks.

    Regards,
    Maggie, a colleague from Jerome
  • 0 in reply to Fredrik K
    Prodigy 30 points
    Dear Fredrik,

    Actually the laboratory in South Korea request this. The lab has checked your answer above and gave his response below :
    I have check the answer
    But he mistake our question is number of burst
    Also he correct the answer
    But our test point is number of burst
    Your product dont have bursts
    You have to make bursts
    It is korea test rule

    Can you please introduce us any contact window in Korea? Hope they can speak Korean directly to each other to understand the question more. Thanks.

    Regards,
    Maggie , a colleague of Jerome
  • 0 in reply to Maggie Wang
    TI__Guru** 106705 points
    Hi Maggie,

    The original question was for ETSI EN 300 328, but now you are asking for Korean regulatory requirements. Can you please confirm which specific test you are having issues with?

    Regards,
    Fredrik
  • 0 in reply to Fredrik K
    Prodigy 30 points
    Hi Fredrik,

    unfortunately we can't. That is the reason why we ask for Korean language support. It is very difficult to clarify the questions in English for weeks. As we only know that part is controlled by TI. So we'd like to call help for Korean language support. Thanks.

    Regards,
    Maggie
  • 0 in reply to Maggie Wang
    TI__Guru** 106705 points

    Hi Maggie,

    For local support in Korea, you will have to contact your TI sales representative. There is unfortunately no Korean support here on E2E.

    Can you not tell me whether you are struggling with certification for ETSI or Korean regulations?

    Regards,
    Fredrik