Re: [USRP-users] 2 rx antennas + USRP B210 + GNU radio

[Marcus D. Leech]

On 2022-03-25 11:20, Jumana via USRP-users wrote:
> I want to capture Lora trace using 2 antennas that located in port 
> A:RX2 and B:RX2 then save the date in a file.
>
> I created a simple Gnu Radio flow-graph. In USRP source, i add serial 
> + 2 channel + freq + gain.
>
> The problem that i can not save the data in a file.
>
> I got error “Port is not connected”
>
> Can any one help me?
>
> I
I've cross-posted to discuss-gnuradio, since this isn't really the 
"teach myself gnuradio" mailing list.

You've disabled your USRP source, the "real" output of your 
complex-to-real is going to a file sink that is configured for 
complex-float.  Your source refers to a variable,
  "gain" that doesn't exist within your graph.

You should probably spend a bit more time with Gnu Radio tutorials.