RG255C-GL (miniPCIe) Active GNSS antenna support

IoT Modules 5G Module
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1

Hello,

I’m working with the RG255C-GL in the miniPCIe form factor and I’d like to use an active GNSS antenna (built-in LNA) for the GPS/GNSS path.

My question is about the antenna bias supply. I probed the GNSS antenna pin/connector and I don’t see any VBIAS (DC voltage) on it, so an active antenna’s LNA wouldn’t be powered.

Could you please clarify whether the RG255C-GL supports an active GNSS antenna (i.e. provides an internal antenna bias on the GNSS RF pin), and if so, how to enable it (e.g. via an AT command or hardware configuration)?

Also, could you point me to the GNSS/GPS AT command manual for this specific module/firmware?

For reference, here is my module info:

ATI
Quectel
RG255C-GL
Revision: RG255CGLABR01A04M4G

AT+QGMR
RG255CGLABR01A04M4G_A0.004.A0.004

Thanks in advance for any clarification.

2

Dear @nfossati
Please share a picture of your module, I need] OC to confirm.

3

Here you are:

1024×768 219 KB

Thank you and best regards

4

Dear @nfossati
Your module doesn’t support active antenna.