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Original question:

Linux/WL1837MOD: How to change the Duty Cycle for WL1837MODGI to 98%

WL1837MOD: WL1837MODCOM8I

sowmya m
Prodigy 20 points
Part Number: WL1837MOD

Tool/software:

How to change the duty cycle during adaptivity test in station mode using iperf3 tool

For now we are using this command 

iperf3 -c ( wlan ip address of access point) -t20 -i2 - w64k -p5201

With this we are able to reach only 3%Duty cycle while communicating with accesspoint 

As per ETSI standard min 30%Dutycycle has to be set

Please help

  • 0
    TI__Mastermind 45145 points

    Hi,

    iperf3 is a public application so you are likely to find guides online for that tool. In short, you want to maximize packet size and minimize delay in between packets. I recommend setting the AP to only use a slow rate like 11b DSSS - 1 Mbps. This would require the PA to be on for longer periods to transmit the full packet size and thus inherently giving a higher Duty Cycle.

  • 0 in reply to Dylan Hubbard
    Prodigy 20 points

    www.ti.com/.../WL18XX-REPORTS

    Hi Dyan,

    Thanks for the information.

    I got this report from TI website in---https://www.ti.com/tool/download/WL18XX-REPORTS  

    WL18MODCOM8I--reports- Report File Name---ER741330-07_R01_EN300328_Texas_WL1837MODCOM8I----- page no-123-131 adaptivity test result are plotted,

    ER741330-01B_R01_EN301893_Texas_WL1837MODCOM8-page no-16-27 adaptivity test results are plotted

    can you please give the information like - FW which has been used for adaptivity test , for generating particular modulation if you are using RTTT tool , then using what command are you communicating with access point

  • 0 in reply to Dylan Hubbard
    Prodigy 20 points

    Hello Dylan,

     Access point we are using at low data rate only. Can you suggest any particular combination of i-interval, t -transmit time, w-bandwidth for achieving 30% Duty cycle, as we are in middle of TEC certification, we have tried multiple comibinations, still couldnt achieve 30%

  • 0 in reply to sowmya m
    TI__Mastermind 45145 points

    Hi,

    We provide FW here - https://www.ti.com/tool/PROCESSOR-SDK-AM335X

    RTTT is not used for this test because you need to establish a connection to an AP - RTTT is mainly for low level control of the Radio.

    I'm not an Iperf expert, but i-internval value should be set to the minimum possible option and t-transmit time should be set to the maximum possible value.

  • 0 in reply to Dylan Hubbard
    Prodigy 20 points

    Hi,

    Thanks.

    One small info, in adaptivity test iperf pinging should take place with DUT or with Access Point.

    Please respond at earliest convenience; we are on a deadline for certification

  • 0 in reply to sowmya m
    TI__Mastermind 45145 points

    Hi,

    The DUT should be generating the traffic (UDP packets so there is no Ack). The adaptivity test is to confirm that the DUT stops transmission when it sees the interferer signal.