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CC3200: CC3200 EN300 328 V2.1.1 adaptivity test failed

Michel Buchs
Prodigy 220 points
Part Number: CC3200

Hello

We are right now in the certification of our CC3200 cevice and the EN300 328 V2.1.1 adaptivity test failed. Adding the interference signal the EUT doesn't stop trasmissions.

I found on page 12-13 and 50 of this PDF this test but there it was PASS:

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/968/ER741317_5F00_R01_5F00_EN300328_5F00_Texas_5F00_CC3100MODR11MAMOB_5F00_Draft_5F00_Report.pdf

Is there something that we have to enable so the CC3200 passes this test?

Happy for any hints!

Thank you

  • 0
    TI__Genius 12270 points
    Hi Michel,

    In order to run adaptivity this must be done at the system level. Please ensure the following

    1) To run the test you need to ensure the AP is set to a single channel and modulation only. This will then force the C3200 to connect to this channel and modulation and not switch during the test
    2) ensure that this is all hardwired. Note that you cannot run the test wireless (antenna to antenna), as you cannot accurately determine the loss and calibrate the system. That means the AP must be able to accept an RF cable.
    3) That is you must connect to an AP then user UDP to send high rate data to the AP. That is the first step. In this way adaptivity is automatically enabled. This test cannot be run using the radiotool.
    4) You want to ensure that the interferer signal is calibrated to the input of your DUT. This is important to ensure that the correct level is see by the CC3200 device.
    5) The interferer signal must be a 100% duty cycle interferer and should be coupled back into the system. IF it is even 99%, then in the 1% window the CC3200 may wake up and transmit. Note that the new standard also calls for 3 different interferer types, but all are 100% duty cycle signals.

    I hope this helps.

    Thanks,
    Riz
  • 0 in reply to Rizwan Murji
    Prodigy 80 points
    Helo Riz

    To point 3)
    That means that our sonftware has to handle this point? the radiotool-fw is not able to handle this? right?

    thanks
    roland
  • 0 in reply to Roland Gmuender
    Prodigy 220 points

    Hello Riz

    The certification lab confirmed us that they are not using the radio tool. The RF cable is soldered right after the balun (on the antenna side) and the antenna trace is cut.

    They just confirmed us that the test is still failing. What else could be wrong??

    They wrote to us:

    "We have  re-test it but still failed, it does not stop the transmission when inject interference signal. It will delay after a period of time to stop transmission.

    T1 is inject interference signal, the standard require this time after the EUT will  to stop the transmission But this sample still transmission until T2  stop.

    In addition, we have tried to increase the interference signal level by 7dBm, but the result is the same I suggest you can  verification it at local"

    Here a pic of the RF cable after the balun:

    Calibration AWGN signal from the certification lab:

    And the measurement again as they described it above:

  • 0 in reply to Rizwan Murji
    Prodigy 220 points
    hello Riz

    Did you see my post a few days ago? See below... it's getting urgent as the certification lab is waiting for our proposal.
    Thank you
  • 0 in reply to Michel Buchs
    Prodigy 80 points

    can anybody else help us at this issue?

    Roland

  • 0 in reply to Roland Gmuender
    TI__Genius 12270 points
    Hi Roland,

    My apologies for the delay. On point 3, yes you need to handle this and connect to the AP. Also It is still unclear to me if your system is completely hardwired. Can you please provide me a block diagram of your setup? Also ensure that the AP that is being connected too is set for a single modulation and the channel you are testing.

    The fact that increasing the power did not stop the transmission means that something is wrong I the setup. Adaptivity (CCA) cannot be turned off as it is part of the FW.

    Another thing to try is to ensure that the region code when you load the code is set for EU and not FCC as adaptivity is a CE requirement. If it is set to FCC, that may be the issue.

    Thanks,
    Riz
  • 0 in reply to Rizwan Murji
    Prodigy 80 points

    Hello Riz

    Thanks for your reply.

    Next step is that we'll try with a new setup.

    Here is the block diagram:

    For the series firmware, I'm not sure where this feature handled exactly?

    Is it handled in the WiFi-Network processor by the servicepack (provided by TI) or in the application firmware?

    thanks

    Roland

  • 0 in reply to Roland Gmuender
    TI__Genius 12760 points
    Hello Roland,

    sent you a mail offline. Waiting for your feedback.

    Regards,
    Bernd
  • 0 in reply to BO
    TI__Genius 12270 points
    Hi Roland,

    For adaptivity (CCA), this is in the MAC layer and thus cannot be changed by the customer. SP can be a part of this if we provide MAC updates. Note that you should also be using the most recent SP.

    Thanks,
    Riz
  • 0 in reply to Rizwan Murji
    Prodigy 80 points
    Hello Riz

    now we passed the test :-)

    The problem was that we wasn't in the test mode for this test.


    thanks for your help
    Roland
  • 0 in reply to Roland Gmuender
    TI__Genius 12760 points

    Hello Roland,

    thank you for the feedback that the issue is solved.

    Regards, Bernd

  • 0 in reply to Roland Gmuender
    TI__Genius 12270 points
    Hi Roland,

    Great to here!

    Riz
  • 0 in reply to Roland Gmuender
    Prodigy 70 points

    Hello Roland,

    I'm also having this same problem regarding the adaptivity test.

    You mention that test mode wasn't on for the test. How did you activate it?

    Is it some configuration that you have to do?

    It would help a lot if you would provide me an answer.

    Thank you very much for your attention!

    Diogo

  • 0 in reply to Roland Gmuender
    Prodigy 70 points
    Hello Roland,

    I'm also having this same problem regarding the adaptivity test.

    You mention that test mode wasn't on for the test. How did you activate it?

    Is it some configuration that you have to do?

    It would help a lot if you would provide me an answer.

    Thank you very much for your attention!

    Diogo
  • 0 in reply to user4624630
    Prodigy 80 points
    Hello Diogo

    You can't unse the Radiotool.bin for this test. You have to use an other (test-) FW for it. You have to bring your machine to a test mode. You can bring up your machine to this mode or you can use an other FW.

    May this will help you:
    processors.wiki.ti.com/.../CC3200_UDP_Socket_Application