[USRP-users] Disabling CORDIC

Hello everyone, When the full manual tuning policy is selected and 0 Hz rotation is configured: > tune_request.dsp_freq_policy = uhd::tune_request_t::POLICY_MANUAL; > tune_request.dsp_freq = 0.0; > or when the policy_none is selected; > tune_request.dsp_freq_policy = uhd::tune_request_t::POLI

Re: [USRP-users] Using a reference clock on USRP E310/312

Hello, To get time and frequency alignment on a pair of E31xs you can supply the 1PPS to both units. The example programs do not all support setting the time source. http://files.ettus.com/manual/page_usrp_e3x0.html#e3x0_hw_sync Here is an example which supports setting the time source, you can m

Re: [USRP-users] 答复: frequency shift of B210

Hi Jong, Marcus Leech and Marco have both offered good advice on testing the frequency stability of the B210 against outside references. Have you tried either? Marcus Muller also asked for additional information about your test setup. Regards, Derek On Wed, Jul 26, 2017 at 2:04 AM, john liu via

Re: [USRP-users] Disabling CORDIC

Hello Altug, If you tune using the tune request with a DSP policy of MANUAL and DSP frequency of 0.0 then yes, that channel's CORDIC will not alter the samples. A policy of NONE will leave the DSP in the last configured state, so it is better to be explicit. Regards, Derek On Wed, Jul 26, 2017

Re: [USRP-users] 答复: frequency shift of B210

To add my experience, my B210 is off about 1 KHz in the 433 MHz bands. A bit above 2 ppm, probably still covered by the specs, but not the best value for a 6 GHz transceiver :) This was better in the beginning, but I don't know if this came from ageing, or from changes in UHD and FPGA image. It

[USRP-users] gcc5 Error when Rebuilding File System

I've been following the guide for rebuilding the file system at https://files.ettus.com/manual/page_usrp_e3x0.html. When I try to build an image with 'bitbake gnuradio-dev-image', I get the following error: ERROR: Function failed: do_compile (log file is located at /home/user/Projects/E310/e300-oe-

Re: [USRP-users] Using a reference clock on USRP E310/312

Hello – Yes I am trying to achieve phase synchronization. So once I set the time source using the function call if (not time_source.empty()) usrp->set_time_source(time_source);, will time and frequency for the two USRPs be aligned? Also, is it true that the USRP E310/E312 cannot use a 10 MHz

[USRP-users] support with NI USRP 2942R GPSDO

Hello I have procured a NI USRP 2942R, which has an inbuilt GPS clock. But whenever I run uhd_usrp_probe, it shows no gpsdo detected and even the same in gnuradio. Also the GPS led doesnot glow, I have connected the GPS antenna to the GPS SMA connector port. Please help me with it. BR Sn

Re: [USRP-users] support with NI USRP 2942R GPSDO

Hi Snehasish. The NI USRP-2942R does not actually have an integrated GPSDO, the* NI USRP-2952R* does. That may be your problem. -Robin On Wed, Jul 26, 2017 at 7:43 AM, Snehasish Kar via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello > > > I have procured a NI USRP 2942R, which has an

[USRP-users] gcc5 Error when Rebuilding File System

I've been following the guide for rebuilding the file system at https://files.ettus.com/manual/page_usrp_e3x0.html. When I try to build an image with 'bitbake gnuradio-dev-image', I get the following error: ERROR: Function failed: do_compile (log file is located at /home/user/Projects/E310/e300-oe-

Re: [USRP-users] timout issue on RFNoC output

Jonathon, I have been working on this the last two days and can't seem to get it working. My destructor looks like this: dataGenerator_impl::~dataGenerator_impl() { std::cout << "In here3.\n"; uhd::rfnoc::dataGenerator_block_ctrl temp; temp.issue_stream_cmd(::uhd::stream_cmd_t::S

Re: [USRP-users] Using a reference clock on USRP E310/312

Hello, Unfortunately the phase offset between channels on separate E31xs is not repeatable between tunes or runs. In order to use multiple E31xs for beamforming or other applications needing known phase offsets it is necessary to supply an external reference signal and use that to measure the offs

Re: [USRP-users] Issues with dual full duplex on x310

Hi Mike, Make sure your MTU is set to 9000. Are you using 1GigE or 10GigE? Do you see underruns improve when running with only 1 TX radio? Jonathon On Tue, Jul 25, 2017 at 2:18 PM, Michael Carosino via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi, > > I'm using gnuradio 3.7.12 and rfnoc

Re: [USRP-users] Issues with dual full duplex on x310

Jonathon, I'm using 1GigE and running at 2Msps (and lower). Unfortunately I cannot use jumbo frames (9000 mtu) as currently our x310's are on a network not setup for them (which breaks other things if enabled). The weird thing is the underruns only occur with the 4 rfnoc radio blocks, they don't o

Re: [USRP-users] gcc5 Error when Rebuilding File System

Dear Alexander, ah, thanks for the error report! Philip has a nice page on how he circumvents such problems: http://www.opensdr.com/posts/using-docker-for-openembedded-builds/ Basically, he uses a docker container to have a controlled version of his OS, and does the build within. Only thing mis

Re: [USRP-users] Disabling CORDIC

Dear Altug, yes, POLICY_MANUAL and dsp_freq = 0 will disable, and POLICY_NONE will inhibit any change (so if you've not tuned the DSP before, it will remain at 0). Note that I'm still far from convinced that solves any of your problems! Best regards, Marcus On 26.07.2017 13:08, altuğ kaya via

[USRP-users] TwinRX + X300 Usage

Hey USRP-users, I am doing some experiments that involve a USRP x300 + (2) TwinRX daughtercards. I am observing some degraded performance and would like some advice on the manner in which I am configuring the receivers / mainboard / daughtercards. The experiment I am conducting involves collecti

[USRP-users] Brench Maint and Master of UHD

HI! Building from source the library UHD, for the branch maint (that is reported is a stable version) I obtained some warnings (during the compilation) for the master no. (I have verified this in a virtual machine that i've rebuilt for "snapshot" trouble but I can rebuilt again the maint versi

Re: [USRP-users] Re I want to build my custom FPGA image but failed to get the license

Thank you for the reply. I use Ubuntu 16.04 LTS -Original Message- From: "Nate Temple" To: "이진세"; Cc: ; Sent: 2017-07-26 (수) 10:06:47 Subject: Re: [USRP-users] I want to build my custom FPGA image but failed to

Re: [USRP-users] 答复: frequency shift of B210

HI,Derek, I am sorry,something wrong with my mail which can not received the replay. I found the answer on user list. thank you. best regards John On Wed, Jul 26, 2017 at 10:03 PM, Derek Kozel wrote: > Hi Jong, > > Marcus Leech and Marco have both offered good advice on testing the > frequency s