WL1831MOD: WL1827MOD

Mainly I want to check about the CSE (conductive spurious emission) test

new version SRRC on 2483.5~2500MHz criteria is under -40dBm, looks it cannot pass the test.

Is there any method we could tune this?

Greetings Michael,

I am not sure what other "title" you are referring to, did you mean to link another e2e post?

The WL18xx modules do not have certification for china as of today, as such we cannot guarantee how it will pass SRRC. Although we can still support the customer with any technical questions for designing and testing their end product.

If the device is not passing spurious emissions they could try to lower the TX power with the INI file, but I believe the device cannot reduce the TX by more than ~10dbm.

We also have certification for other regions that customers can leverage, for example the WL1831MOD has modular certification for FCC, ISED, ETSI/CE, RED, and MIC/TELE but not for the china region.  The customer can also download any of our certification reports from https://www.ti.com/tool/WL18XX-CERTIFICATION 

BR,

Jessica M. Torres

Thanks Jessica,

We actually tried reduce TX power but still failed the spurious emission test.

So still wondering if there is any other settings that we do modify?

Hi Michael ,

As mentioned we cannot guarantee how the WL18xxMod will pass SRRC for their product. I would recommend they try to change the duty cycle by varying the packet length and delay (refer to page 15 of the WiLink WLAN IP Real-Time Tuning Tool (RTTT) for the DC equation).

They should also make sure their end product followed our documented Design recommendations (see Module Hardware Integration Guide, WL18xx Design Checklist, and Antenna Impedance Measurement and Matching), plus they can submit for a design for a HW review (https://www.ti.com/tool/WILINK-DESIGN-REVIEWS). 

For example they should have hopefully followed the Antenna Recommendations from the Wl18xx HW integration Guide.

At this point it is up to the customer to modify their testing and design to pass SRRC. We are here in case they have any other technical questions, but cannot help with exactly how to pass the certification.

BR,

Jessica M. Torres

Thank you Jessica, let us check internally first!

Really appreciate!