TX Power issues

[Hass]

Hello,

I am using WM02F WiFi mdule with nRF7002 SoC and i am having some issues with the TX power measurement of the WM02F WiFi module while operating it in 2.4GHz. 

I have tested these modules (ordered from Fanstel and Jetreq Components) on the same hardware and experiencing the different TX power in 2.4GHz band in all channels (1-14).

So, I was just wondering if there are any settings I have to change in the firmware, so both modules (from fanstel and Jetreq) have the same Tx power performance. the only difference on these modules i can see is 40MHz crystal but with difference order info.

Thankful for your guidance!

[Samruddhi Jadhav]

Hello,

Have you tried swapping the chips? It would be great if you could provide some conducted measurements so that we would be able to review a bit better. It is also possible that there could be some random fault or that the issue is occurring due to the diplexer being broken. Do you have any more of these modules? 

Best Regards,

Samruddhi

[Hass]

Hello,

no i have not swapped the chips and thats what i think could be the issue and asking for your help to verify!

Samruddhi Jadhav said:

It is also possible that there could be some random fault or that the issue is occurring due to the diplexer being broken. Do you have any more of these modules?

I have tested on 4 different modules with the same results. i have a couple of spare modules and i am working on swapping different components on these just for verification but as of now i have not any results!

kind regards

Hass

[Samruddhi Jadhav]

Hello,

Our hardware expert has suggested that the next step would be to swap the chips as well so that we get to know if it is the board or the chip which is causing the lower power. 

Best Regards,

Samruddhi

[Hass]

Hello,

now i have swapped all the components on the module without any change in TX power. so my guess is it is the chip itself. and it is almost impossible for me to swap the chip on the module without damaging the chip/module! (sorry not very good in de-soldering the QFNP modules).

is there any other thing we need to look into? firmware?

Thank You!

[Samruddhi Jadhav]

Hello,

We thought that you were using two different modules, one from Fanstel and one from Jetreq. From the picture you shared, both seem to be the same so a suggestion would be to contact Fanstel about this. 

Best Regards,

Samruddhi