Antenna conncetion and selection

1.There are 10 uFL antenna ports on the board, which port should I choose?
2.How can I change or enable the antenna ports?
I’m using RX1_L; RX1_H,;TX1_1,;TX1_2


RX is for receiving signal, TX for transmitting. You can transmit and receive two signals simultaneously, this is why there are RX1_* and RX2_*.

_L is tuned for low frequency, <= ~ 1.5 Ghz, _H is for > 1.5 Ghz

You can select an antenna port in a software you are using, e.g. in an OsmoSDR Source box if you are using GNU Radio, or in the Antenna list if you are using Gqrx.

See also this thread RF connection: 10 U.FL connectors (6 RX, 4 TX)?