Hi Marcus, Thanks for the response. So just to be clear, if I am using the RF:A channel Tx/Rx port at say 200MHz, and wanted to also transmit from the Rx:B channel Tx/Rx port, then the only frequency I can transmit from the second channel would be 200 MHz because both channels are shared right? Is there a known way to be able to transmit (or receive) from both channels in a B210 using different frequencies ?
Thanks again, Jose On Wed, Jul 26, 2017 at 6:38 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 07/20/2017 02:23 AM, Jose Ruvalcaba wrote: > > Hello, > > I'm currently having issues simultaneously transmitting and receiving data > from one B210 to another B210. My goal is to send Tx data from one B210 and > have it be received and re transmitted from a second B210 back to the > first. I am trying to use both channels (RF A and RF B) to simultaneously > transmit and receive on both radios. To do this I have set the "Mb0 Subdev > Spec" to "A:A A:B" on both the USRP source and sink blocks, as I have shown > in the flowgraphs attached. My radio can successfully transmit data from > one B210 and have it be received in the second B210. However, my issue > arises when my second B210 tries to re transmit the received data back to > the original B210 (This is shown if usrp_2_channel.png flowgraph). > > My question is, in order to accomplish successful Tx to Rx loopback on > both radios, do I need to label the Subdev spec section as A:A A:B? Have I > labeled the Subdev correctly for a B210 or do I need to change it? Is it > possible for a USRP to transmit and receive simultaneously on both RFA and > RFB channels of a B210? If so, can I do this while using different > frequencies on each channel? Just for completeness I have both radios > connected to each other using coaxial cables with a 38dB attenuation > between each path. > > Thanks, > Jose > > > _______________________________________________ > Discuss-gnuradio mailing > listDiscuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > Jose: > > Your basic problem is that on the B210, the synthesizer for BOTH TX > channels is shared, and the synthesizer for both RX channels is shared. > > This means that ordinarily both channels have to be tuned to the same > frequency. There are ways to "cheat" if your two desired "air" frequencies > are close together, but in your case, they are 30MHz apart. > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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