I was wanting to check the feasibility of adding an external antenna jack. Based on the rf switch data sheet I see that vrx1, vrx2, vtx1, vtx2 using logic control changes the Rx and tx antenna used. If I could swap the logic I could attach an external jack but I would still be able to use the original onboard antenna. Sounds straight forward right?
Now here’s the issue. I used the data sheet and found pins 21, 22, 25, & 26 on the board. My issue is that all the pins were low using a 10k-ohm resistor. This is not a listed configuration on the data sheet.
In addition vrx1 and vrx2 on the back side of the board don’t seem to be connected via traces to the switch.
So now here I am wondering if I am just seeing things wrong or there is a missconfiguration with the board. If there is a intended fraction antenna may not be selected properly.
Can anyone else confirm what I am seeing?
My board version is v1.0 2017 Gt-175-00003.