Hi Martin, Sorry about not posting my error message, however i think I have it almost correct now. At least i don't get errors when executing the python script. My problem is now i was expecting my message signal to be modulated on both carrier frequencies. But when i for instance set my Tx_A to RF 900 MHz and my Tx_B to RF 800 MHz, i only see the fully modulated signal on Tx_A. Tx_B is just the unmodulated carrier at 800 MHz.
I guess i need to make some changes in the flow graph, to set the message signal to Tx_B also. Could you point me in the direction of how this is done the most effective? i guess my Tx block needs two inputs now, but they need to be the same signal? The RFID package is struggling to keep the latency requirement as is, so i need to do this effectively. Im not using UHD because the RFID package does not support UHD, thus I'm on Gnuradio 3.3.0 Martin Braun-4 wrote: > > Hi RuneS, > > please provide more info (see > http://gnuradio.org/redmine/projects/gnuradio/wiki/ReportingErrors). > At the very least, post the error message. > Also, you seem to be not using UHD (which most people here use). > > MB > > On Tue, Mar 20, 2012 at 04:39:09AM -0700, RuneS wrote: >> >> Hello, >> >> Im using an RFID package already made (by M. Buttner), and trying to >> alter >> the python script to output the same message signal on both Tx_A and Tx_B >> but on different carriers. However i can't seem to make it work. I have >> searched the net for examples of how to transmit on both channels with >> the >> same signal, but can't find anything. The carrier setting i am pretty >> sure i >> have correct. >> >> I get a error as I'm trying to set the usrp.sink_c with nchan=2 and >> further >> set the tx.set_mux with ((0,0),(0,1)) for targeting the Tx_A and Tx_B >> port. >> >> Further more i don't know if the flow graph needs to be altered as my tx >> sink then needs to latch the same data out on both ports? Or is there a >> more >> efficient way to implement this? >> >> Can someone please help me, or refer to a forum or anything where such a >> question is possibly answered. >> -- >> View this message in context: >> http://old.nabble.com/Transmit-on-both-Tx-ports-%28USRP1.%29-tp33538187p33538187.html >> Sent from the GnuRadio mailing list archive at Nabble.com. >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- > Karlsruhe Institute of Technology (KIT) > Communications Engineering Lab (CEL) > > Dipl.-Ing. Martin Braun > Research Associate > > Kaiserstraße 12 > Building 05.01 > 76131 Karlsruhe > > Phone: +49 721 608-43790 > Fax: +49 721 608-46071 > www.cel.kit.edu > > KIT -- University of the State of Baden-Württemberg and > National Laboratory of the Helmholtz Association > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/Transmit-on-both-Tx-ports-%28USRP1.%29-tp33538187p33539515.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
