Marcus, I mis-spoke: I am using a common *receiver* application, and I am comparing the received spectrum when using either the N21 or the USRP2 as the transmitter.
Attached are the screen shots of the parameters of the UHD USRP Sink block, which is common when using either of the two boxes to transmit (other than the IP address). Attached also are the results of executing "uhd_usrp_probe" for each of the two boxes. I do not understand why I am seeing a healthy spectrum when receiving from the N210 transmitter, but nothing when receiving from the USRP2 transmitter. Help. Thanks, Aaron From: Marcus D. Leech <patchvonbr...@gmail.com> Sent: Tuesday, April 2, 2019 9:34 AM To: Chesir, Aaron M. <ache...@mitre.org>; discuss-gnuradio@gnu.org Subject: Re: [EXT] Re: [Discuss-gnuradio] Need support for USRP2 On 04/02/2019 09:20 AM, Chesir, Aaron M. wrote: When I generate a known good signal in the ISM band (902 MHz), I can use any other receiver with GRC and a good spectrum will be displayed. When I use the USRP2 with GRC, to receive and characterize energy , GRC offers no complaints, but GRC indicates no reception of any signal energy. What daughtercard do you have installed? What gain setting are you using? From: Discuss-gnuradio <discuss-gnuradio-bounces+achesir=mitre....@gnu.org><mailto:discuss-gnuradio-bounces+achesir=mitre....@gnu.org> On Behalf Of Marcus D. Leech Sent: Tuesday, April 2, 2019 9:06 AM To: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org> Subject: [EXT] Re: [Discuss-gnuradio] Need support for USRP2 On 04/02/2019 09:00 AM, Chesir, Aaron M. wrote: Folks, Apparently the USRP2 is no longer supported by GNUradio Companion. Do any of you have the source files that would allow one to use gr_modtool to build a GRC block for the USRP2: One to transmit and one to receive? Thanks, Aaron That isn't true. You can even still use USRP1 with Gnu Radio. From: Discuss-gnuradio <discuss-gnuradio-bounces+achesir=mitre....@gnu.org><mailto:discuss-gnuradio-bounces+achesir=mitre....@gnu.org> On Behalf Of Neel Pandeya Sent: Saturday, March 16, 2019 10:37 PM To: krist...@skypro.be<mailto:krist...@skypro.be> Cc: GNURadio Discussion List <discuss-gnuradio@gnu.org><mailto:discuss-gnuradio@gnu.org> Subject: [EXT] Re: [Discuss-gnuradio] forum to learn more about signal-processing and SDR ? Hello Kristoff: These pages have links to resources that might be helpful to you. https://kb.ettus.com/Suggested_Videos https://kb.ettus.com/Suggested_Reading --Neel Pandeya On Sat, 16 Mar 2019 at 21:01, Ali Dormiani <sdorm...@eng.ucsd.edu<mailto:sdorm...@eng.ucsd.edu>> wrote: This book is also a great starting point and reference. Digital Signal Processing by Oppenheim and Schafer Also, here is a fun visual way of getting an alternative understanding of Fourier transforms. https://www.youtube.com/watch?v=spUNpyF58BY Have fun, Ali On Sat, Mar 16, 2019 at 2:24 PM Albin Stigö <albin.st...@gmail.com<mailto:albin.st...@gmail.com>> wrote: This book is a very good starting point: http://www.dspguide.com dsp.stackexchange.com<http://dsp.stackexchange.com> is a good place for questions. Good luck. Albin SM6WJM On Sat, Mar 16, 2019, 22:20 Kristoff <krist...@skypro.be<mailto:krist...@skypro.be>> wrote: Hi, One of the reasons I am currently using GNU Radio is to learn more about signal-processing and SDR. As the "discuss-gnuradio" list is about gnuradio itself, what would be a good mailing-list, newsgroup or forum to ask more generic questions about signal-processing? Kristoff (ON1ARF) _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org<mailto:Discuss-gnuradio@gnu.org> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org<mailto:Discuss-gnuradio@gnu.org> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org<mailto:Discuss-gnuradio@gnu.org> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org<mailto:Discuss-gnuradio@gnu.org> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio h
linux; GNU C++ version 4.8.5 20150623 (Red Hat 4.8.5-16); Boost_105300; UHD_003.010.001.000-0-unknown -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes _____________________________________________________ / | Device: USRP2 / N-Series Device | _____________________________________________________ | / | | Mboard: USRP2 r4 | | hardware: 1024 | | mac-addr: 00:50:c2:85:35:d3 | | ip-addr: 255.255.255.255 | | subnet: 255.255.255.255 | | gateway: 255.255.255.255 | | gpsdo: none | | serial: 1491 | | FW Version: 12.4 | | FPGA Version: 10.1 | | | | Time sources: none, external, _external_, mimo | | Clock sources: internal, external, mimo | | Sensors: mimo_locked, ref_locked | | _____________________________________________________ | | / | | | RX DSP: 0 | | | | | | Freq range: -50.000 to 50.000 MHz | | _____________________________________________________ | | / | | | RX DSP: 1 | | | | | | Freq range: -50.000 to 50.000 MHz | | _____________________________________________________ | | / | | | RX Dboard: A | | | ID: WBX, WBX + Simple GDB (0x0053) | | | Serial: 585-RX | | | _____________________________________________________ | | | / | | | | RX Frontend: 0 | | | | Name: WBXv2 RX+GDB | | | | Antennas: TX/RX, RX2, CAL | | | | Sensors: lo_locked | | | | Freq range: 68.750 to 2200.000 MHz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Bandwidth range: 40000000.0 to 40000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Codec: A | | | | Name: ltc2284 | | | | Gain Elements: None | | _____________________________________________________ | | / | | | TX DSP: 0 | | | | | | Freq range: -50.000 to 50.000 MHz | | _____________________________________________________ | | / | | | TX Dboard: A | | | ID: WBX (0x0052) | | | Serial: 585-TX | | | _____________________________________________________ | | | / | | | | TX Frontend: 0 | | | | Name: WBXv2 TX+GDB | | | | Antennas: TX/RX, CAL | | | | Sensors: lo_locked | | | | Freq range: 68.750 to 2200.000 MHz | | | | Gain range PGA0: 0.0 to 25.0 step 0.1 dB | | | | Bandwidth range: 40000000.0 to 40000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: A | | | | Name: ad9777 | | | | Gain Elements: None
linux; GNU C++ version 4.8.5 20150623 (Red Hat 4.8.5-16); Boost_105300; UHD_003.010.001.000-0-unknown -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes _____________________________________________________ / | Device: USRP2 / N-Series Device | _____________________________________________________ | / | | Mboard: N210r4 | | hardware: 2577 | | mac-addr: 00:80:2f:0a:f0:5b | | ip-addr: 192.168.1.80 | | subnet: 255.255.255.255 | | gateway: 255.255.255.255 | | gpsdo: none | | serial: F5198B | | FW Version: 12.4 | | FPGA Version: 11.1 | | | | Time sources: none, external, _external_, mimo | | Clock sources: internal, external, mimo | | Sensors: mimo_locked, ref_locked | | _____________________________________________________ | | / | | | RX DSP: 0 | | | | | | Freq range: -50.000 to 50.000 MHz | | _____________________________________________________ | | / | | | RX DSP: 1 | | | | | | Freq range: -50.000 to 50.000 MHz | | _____________________________________________________ | | / | | | RX Dboard: A | | | ID: WBX v3, WBX v3 + Simple GDB (0x0057) | | | Serial: F576A5 | | | _____________________________________________________ | | | / | | | | RX Frontend: 0 | | | | Name: WBXv3 RX+GDB | | | | Antennas: TX/RX, RX2, CAL | | | | Sensors: lo_locked | | | | Freq range: 68.750 to 2200.000 MHz | | | | Gain range PGA0: 0.0 to 31.5 step 0.5 dB | | | | Bandwidth range: 40000000.0 to 40000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | RX Codec: A | | | | Name: ads62p44 | | | | Gain range digital: 0.0 to 6.0 step 0.5 dB | | | | Gain range fine: 0.0 to 0.5 step 0.1 dB | | _____________________________________________________ | | / | | | TX DSP: 0 | | | | | | Freq range: -50.000 to 50.000 MHz | | _____________________________________________________ | | / | | | TX Dboard: A | | | ID: WBX v3 (0x0056) | | | Serial: F576A5 | | | ID: WBX + Simple GDB, WBX v3 + Simple GDB, WBX v4 + Simple GDB, WBX-120 + Simple GDB (0x004f) | | | Serial: F53C1F | | | _____________________________________________________ | | | / | | | | TX Frontend: 0 | | | | Name: WBXv3 TX+GDB | | | | Antennas: TX/RX, CAL | | | | Sensors: lo_locked | | | | Freq range: 68.750 to 2200.000 MHz | | | | Gain range PGA0: 0.0 to 31.0 step 1.0 dB | | | | Bandwidth range: 40000000.0 to 40000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: A | | | | Name: ad9777 | | | | Gain Elements: None [lab@mm182290-pc ~]$
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