Re: [Discuss-gnuradio] Audio sink/source issues and some other questions

[Marcus D. Leech]

On 11/05/2017 10:35 AM, Adrian Musceac wrote:
> Another problem I have is that I'd like to do a mixed mode repeater
> (from digital to analog and viceversa). My radio (USRP B200) is full
> duplex so I should be able to do that. However, I can't figure out how
> to do that in a single flowgraph (TX and RX). If I set the source
> parameters to use the TX/RX antenna, any time I switch from RX to TX,
> the sink moves automatically to port RX2 which means I'm receiving my
> own transmission. I'd like to be able to disable the automatic switch
> of antenna without stopping the RX flowgraph. Is that possible?
>
> Appreciate any help.
>
> Adrian
You will always receive your own transmissions.   You really *DO NOT* 
want to disable antenna switching, since this is what protects the RX 
chain from being connected to the same port you're transmitting from, 
and incurring damage.

The TX-to-RX isolation isn't that "deep", so you'll nearly always 
receive your own transmissions, and you have to structure your signal 
flows to deal with that.