CC3135: The application issues of chips

Part Number: CC3135

Tool/software:

1.I would like to inquire if there is a way to make TI cc3135 support iperf for Wi-Fi streaming? His core concern is how to test the throughput from MCU to cc3135. Whether using iperf is relevant or not is not the main point. If there are some demos that can be ported to the MCU to achieve the same purpose, that would also be fine. Please help reply, thank you!

2.I also encountered a problem. When using the radio tool to perform non-signaling strong transmission tests on the cc3135, we are transmitting at high speed (54M) on the 5G 11a 54M 36 and 100 channels. We found that the power during non-signaling strong transmission using the tool is 12 - 14 dBm lower than that during signaling tests. Could you please help us check if there is a problem with the settings of the radio tool? Thank you!

Tool setting interface

Strong transmission using radio tool

Signaling test

  • These issues are extremely important and urgent. Please help reply to as soon as possible. Thank you!

  • Hey Tony,

    I have assigned this thread to one of our HW experts - they should be able to provide feedback as early as Sunday. Thank you for the patience.

  • Hi Tony,

    1. you can use the "send" or "recv" commands to run throughput from the host MCU through the CC3135 and to a server connected via AP. it is very similar to iperf command. You can read about these commands in this document: https://www.ti.com/lit/ug/swru455m/swru455m.pdf section 6.5. 

    2. Does this only happen on channels 36 and 100? on any other rates? What about 2.4GHz channels? You should also try changing the country code to EU or unlimited instead of US.

    Regards,

    Jonathan

  • Hi jonathan,

        Regarding the second issue:While using our firmware,the non-signaling transmit power on the 2.4GHz band remains normal. However, the lower power output is observed across all 5GHz bands,protocols and rates during non-signaling transmission test. We have tried switching the country code to "Unlimited", but the issue persists. Additionally, we downloaded the CC3135 firmware from the radio tool folder for comparison. Tests indicate that non-signaling test power is 12–14 dBm lower than that in signaling tests on both the 2.4GHz and 5GHz bands.

  • Hi,

    Perhaps it is wrong configuration used on the R&S machine. can you share screenshots of the configurations used on the R&S? Make sure you configured non-signaling mode in the R&S.  

    Also, do you have another signal analyzer available? perhaps a LitePoint or spectrum analyzer?  I want to see if it a lab equipment issue. 

    Regards,

    Jonathan 

  • HI,

    This is the non-signaling wifi configure display of our CMW500. 

    And this picture show the test result  I obtained using the cmw500. I have transmitted at low speed (6M) on the 5GHz  36 channels. 

    And this picture show the test result  I obtained using the spectrum analyzer.

    and this picture is mine radio tool setting display.

    So is there any wrong with my setting of the cmw500 or the radio tool?

    Thank you!

  • Hi,

    I checked in our documentation and turns out this is expected behavior, when using Radio tool the tx power for 5GHz is locked at 0dBm.  

    You can read more about this in the Radio tool user's guide: https://www.ti.com/lit/ug/swru471b/swru471b.pdf 

    Regards,

    Jonathan

  • Hi ,

    I would like to confirm whether this "0" represents the power level 0 of 5Ghz Wi-Fi or if it indicates that the tx power of 5GHz Wi-Fi is 0 dBm? If the tx power for 5Ghz is locked at 0 dBm, then how should the radio tool be set up to enable the 5G Wi-Fi to output the maximum power?

    Thank you!