Re: [Discuss-gnuradio] A Clarification
Hope i am not asking a silly question.. Where can i find the "Dual -DDC"feature.Is it confined to a particular version.Since i don't find it . Thanks! For USRP1 and N2XX, you get it by default, and UHD figures out what to do (for the most part) based on your configuration. For B100, you need the _2rx FPGA image. See the attached dual_channel_wbx.grc example attached. Note that the subdev spec shows the same subdev for both channels: A:0 A:0 in this case And you have to use some of the magic in uhd.tune_request() to enable manual setting of the RF frequency, which we simply calculate as the midpoint between the two desired frequencies, and then we let the DDCs sort things out from there. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org dual_channel_wbx.grc Description: application/gnuradio-grc ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] A Clarification
Hope i am not asking a silly question.. Where can i find the "Dual -DDC"feature.Is it confined to a particular version.Since i don't find it . Thanks! - Manjusha -- View this message in context: http://gnuradio.4.n7.nabble.com/A-Clarification-tp41661p41664.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] A Clarification
Hi, I would appreciate if the following are clarified regarding USRP, 1.Is it necessary to have two daughter boards in USRP1 to receive data at two different frequencies? 2.If one daughterboard is used,can it receive the data individually and separately at different frequencies? Thanks!! It depends. If those frequencies are separated by less than the analog bandwidth of a single daughtercard, then you can use the dual-DDC feature to pick both of those frequencies out of the larger bandwidth. Otherwise, you must use another card. Each daughtercard has only a single analog downconverter, and there's only a single dual-channel ADC to sample the output of the card. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
