Okay, we thought that when a TX signal sent, RX will be interrupted. That was what I meant.
On Tue, Jan 10, 2023, 22:32 Marcus D. Leech <patchvonbr...@gmail.com> wrote: > On 10/01/2023 14:01, okan erturk wrote: > > So TX has a priority over RX, am I right? > > Not sure what you mean by "priority". > > The RX/TX port will be connected to the TX whenever it's transmitting. > > The RX chain can either be connected to the RX2 port all the time, or if > it's configured for > TX/RX, the ATR (Automatic Transmit Receive) logic in the FPGA will > switch the RX chain > between the TX/RX and RX2 ports whenever there's an active transmission. > > In the case of Karen's flow-graph, it transmits all the time, so the RX > chain will be switched > to the RX2 antenna port, regardless of what its preferred antenna > setting is. > > Now, IN ADDITION to all of this, since the maximum isolation between > antenna ports is not > super high, the RX chain WILL SEE YOUR TRANSMISSIONS. You just need to > be prepared for > that. > > > > > On Tue, Jan 10, 2023, 21:54 Daniel Estévez <dan...@destevez.net> wrote: > >> On 09/01/2023 18:20, Karen young wrote: >> > Hi, >> > >> > I want to use the single port (TX/RX) from USRP B210 to switch between >> > transmitting and receiving. I have selected "Ch0: Antenna: TX/RX" for >> > both the USRP sink and source blocks as shown in the figure. I expect >> > the TX/RX port will show orange light. But the USRP hardware still >> > transmits through TX/RX port (Red light on), and receives through RX2 >> > port (Green light on). >> > >> > What needs to be set if only using a single TX/RX port for switching >> > between transmitting and receiving? >> >> Hi Karen, >> >> It seems that you're trying to transmit continuously, since the Signal >> Source is delivering samples to the USRP sink all the time. The TX/RX >> port cannot be used for simultaneous transmit and receive. It can only >> do one at a time (but can switch during the flowgraph execution). >> >> To receive whenever you are not transmitting something, you need to use >> burst transmissions >> (https://wiki.gnuradio.org/index.php/USRP_Sink#Bursty_Transmission). I >> think that if you do this, the USRP will switch to transmit when you >> send it a burst, and will switch to receive whenever it has nothing to >> transmit. >> >> Best, >> Daniel. >> >> >
