iwlist scan | egrep -i 'ssid|quality'

Question

Like many people with a Realtek RTL8723BE Wi-Fi controller I have issues catching Networks. I followed the answer from here:

https://askubuntu.com/a/1079892/898693

But at point 7,when entering: iwlist scan | egrep -i 'ssid|quality'

I get following output:

``` enp3s0 Interface doesn't support scanning.

lo Interface doesn't support scanning.

```

So my question is, if there's another way arround to test which antena I should use?

Thanks for the help!