• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 40 subscribers
  • Views 475 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

Linux/WL1837MOD: CONTINUOUS WAVE MODE SETTINGS FOR WL1837MOD

Linux/WL1837MOD: CONTINUOUS WAVE MODE SETTINGS

ANURAG SINGH61
Prodigy 210 points
Part Number: WL1837MOD


Tool/software: Linux

Hello,

For the Continuous Wave mode testing we have followed the below link,

http://processors.wiki.ti.com/index.php/WL18xx_TX_Testing#TX_Tone_Test

All the prerequisites given in the link has been followed, however in the analyzer we are not able to see the expected results.

Below is the list of commands we ran as per our channel and band configuration


calibrator wlan0 plt power_mode on


calibrator wlan0 wl18xx_plt stop_tx

calibrator wlan0 wl18xx_plt tune_channel 11 0 1

calibrator wlan0 wl18xx_plt set_tx_power 20000 1 0 11 0 3 0 0 0 0 0 0

calibrator wlan0 wl18xx_plt start_tx 300 11 500 0 0 1 0 2 68:9E:19:15:4D:70 E5:E2:C5:D3:D8:D9 0

Please let us know what is the missing link and let us know if you need more input on this

Thanks,

Anurag

  • 0
    TI__Genius 10550 points

    Hi Anurag, 

    Looks like the command that you tried are for modulated signal test. Can you please try the following commands? 

    // 2.4GHz Transmit Silence
calibrator wlan0 plt power_mode on
calibrator wlan0 wl18xx_plt tune_channel 6 0 0
calibrator wlan0 wl18xx_plt tx_tone_start 0 0 0 0
calibrator wlan0 wl18xx_plt tx_tone_stop

    Regards, 
    Sudharshan K N
  • 0 in reply to Sudharshan KN
    Prodigy 210 points

    Hello Sudarshan,

    I have tried the following,

    calibrator wlan0 plt power_mode on
    calibrator wlan0 wl18xx_plt tune_channel 5 0 3
    calibrator wlan0 wl18xx_plt tx_tone_start 2 0 0 0

    But what I am seeing on the analyser the center-frequency as for channel-5 as 2.442GHz instead of 2.434GHz

    Please help 

  • 0 in reply to Sudharshan KN
    Prodigy 210 points

    Please refer the below post of 24th June 2019

  • 0 in reply to ANURAG SINGH61
    TI__Genius 10550 points

    Hi Anurag, 

    You are giving the following commands 

    calibrator wlan0 plt power_mode on
    calibrator wlan0 wl18xx_plt tune_channel 5 0 3
    calibrator wlan0 wl18xx_plt tx_tone_start 2 0 0 0

    In tune_channel you are setting the 3rd parameter as "3". This means that it is for 40MHz. You need to set this to 20MHz (option 0). Please refer to http://processors.wiki.ti.com/index.php/WL18xx_TX_Testing#TX_Tone_Test section "Tune Channels" for details. 

    Since the BW is set to 40MHz, the tool is picking the lower primary channel for channel 5 and the frequency is tuned to around channel 7 

    Also the Tx tone command is problematic:

    calibrator wlan0 wl18xx_plt tx_tone_start 2 0 0 0

    The 2nd parameter is the bin index – if they set it to 0 than the CW will be on top of the DC…

    If you want to set it to 2434MHz than you needs to set it to a different OFDM bin:  -6 x312.5KHz = LO – 1.875MHz

    Bottom-line, Please use the following command to get the desired o/p:

    calibrator wlan0 wl18xx_plt tune_channel 5 0 0
    calibrator wlan0 wl18xx_plt tx_tone_start 2 -6 0 0