Quectel EC25 GPS not working with active antenna

I have a Quectel EC25 running on the Raspberry Pi 3G/4G & LTE Base HAT. When I connect a passive antenna to the middle pin I can get a GPS fix. To improve signal quality I added an active antenna and a SMA to u.FL adapter, but now I have no GPS at all, cgps shows 0 satellites after a long time. Is there something I need to enable in AT commands to add an active antenna?

Hi,

The requirements for using an active antenna are specified in the module documentation. Please check this to make sure it meets the requirements. There is no AT command to add an active antenna.