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Original question:

WL1837MOD: How to run certification tests for Wilink8 Wifi and Bluetooth

WL1837MOD: calibrator vs "iw wlan0 scan"

Scott Campbell3
Prodigy 20 points
Part Number: WL1837MOD

We are testing for FCC certification and having some trouble with channel 1. I am using calibrator to send waveforms using the max power value of 20000. I notice the amplitude in the spectrum analyzer during a scan is lower than when I manually use calibrator.

My question is what power level is used during the normal wifi scan operation? Is maximum power used?

What is the recommended procedure on the device side for transmissions testing?

I'm in a cage, there is no AP, what's a realistic scenario for testing?

Manually controlling wifi is not part of the normal use case for this device.

I have tried using wlconf to change wl18xx.phy.pwr_limit_reference_11_abg, I can see the settings persist during reboot, but I don't see any changes in the spectrum analyzer.

  • 0
    Prodigy 20 points

    A better experiment leads me to believe that wifi scan uses the full power.

    As the oem, are we supposed to be able to control the max output using wlconf?

    I can change pwr_limit_reference_11_abg to 0x01 from it's default of 0x64, and see no change in response.

  • 0 in reply to Scott Campbell3
    TI__Mastermind 46371 points

    Hi Scott,

    Are you using the latest INI file? The output power should be set according to the INI file for certification testing.

    Please ensure that the gain_calculation_mode option is set to 0. This will ensure parameters are taken from the FW (.INI file). 

    The test house we work with uses a R&S CMW in AP mode. Testing should be done in a shielded room.

    BR,

    Seong