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?