Re: [USRP-users] X310 RFNoC transmission issues

I'm back with an update. As I mentioned below, I don't think my CEs are the main issue here (I haven't ruled it out completely) so to highlight the issue I'm struggling with, I'll try to present a reproducible example that does not involve my custom CEs: Consider the block diagrams seen here:

[USRP-users] Configuration in sysctl.conf

Hi! I'm using a X310 on a linux box UBUNTU 18.04 Executing the command "uhd_usrp_probe" I obtain a lot of [WARNING][UDP] related to the dimension of the send buffer Then there is the sentence: Please run: sudo sysctl -w net.core.wmem_max=24862979 So I've written in the file /etc/sysctl.conf, at t

Re: [USRP-users] USRPs time wrong by factor of two

Hi, is there any update regarding this issue? Am 26.04.2019 um 11:27 schrieb Fabian Schwartau via USRP-users: Hi, is it to be expected that this will be fixed soon? Is someone at Ettus working on this? Best regards, Fabian Am 23.04.2019 um 19:34 schrieb Fabian Schwartau via USRP-users: OK,

Re: [USRP-users] Timed frequency switching on multiple channels not possible

Hi, is there any update regarding this issue? Am 06.05.2019 um 10:36 schrieb Fabian Schwartau via USRP-users: Sorry for the late answer, I was busy. I tried that including a one second sleep after it but it does not help. Am 26.04.2019 um 18:30 schrieb Marcus D. Leech via USRP-users: On 04/26/

[USRP-users] Need a little help with running legacy prebuilt UHD versions

I need a bit of help to understand how to run legacy prebuilt UHD versions from the files.ettus.com/binaries/uhd repository. I would like to try various UHD versions to try to find a version that will run with an elderly (Rev 2) N210 with unknown firmware

Re: [USRP-users] Configuration in sysctl.conf

On 05/09/2019 08:25 AM, Disco Daniele via USRP-users wrote: Hi! I’m using a X310 on a linux box UBUNTU 18.04 Executing the command “uhd_usrp_probe” I obtain a lot of [WARNING][UDP] related to the dimension of the send buffer Then there is the sentence: Please run: sudo sysctl -w net.core.

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Maybe try running a VM of a version of Ubuntu that is roughly the vintage of that version of UHD? From: USRP-users on behalf of Joe Martin via USRP-users Sent: Thursday, May 9, 2019 9:53 AM To: Joe Martin Cc: usrp-users@lists.ettus.com Subject: [USRP-users] Nee

Re: [USRP-users] Configuration in sysctl.conf

Have you done the same for "rmem_max"? Perhaps the continued warning messages are related to this rather than wmem_max? Rob On Thu, May 9, 2019 at 10:01 AM Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com> wrote: > On 05/09/2019 08:25 AM, Disco Daniele via USRP-users wrote: > > Hi!

Re: [USRP-users] [EXT] Re: Configuration in sysctl.conf

# # /etc/sysctl.conf - Configuration file for setting system variables # See /etc/sysctl.d/ for additional system variables. # See sysctl.conf (5) for information. # #kernel.domainname = example.com # Uncomment the following to stop low-level messages on console #kernel.printk = 3 4 1 3

Re: [USRP-users] N310 Multi Device Configuration

Hello again, So, I am still getting the same error with the example "txrx_loopback_to_file" so instead I tried to run "tx_waveforms" (the only other example that supports multiple channels). I give the following command: ./tx_waveforms --freq 2.60e9 --rate 7.68e6 --gain 60 --args "addr0=192.168.1

Re: [USRP-users] X310 witn TwinRX: master_clock_rate issue

Sorry to revive an old post but I'm having the same problem with UHD 3.12.0.0. Am I doing something wrong with uhd_rx_cfile or should I just upgrade to a newer UHD? $ uhd_rx_cfile -r 10e6 -f 850e6 -a 'args=192.168.40.2,master_clock_rate=200e6' tmp.dat [INFO] [UHD] linux; GNU C++ version 4.8.5 201

Re: [USRP-users] [EXT] Re: Configuration in sysctl.conf

The number that seems configured every time I run uhd_usrp_probe is 1048576 that is the value present in the file wmem_max in the directory /proc/sys/net/core/ I searched also the way to modify this value and I found: sudo -s -H echo 24862979 > /proc/sys/net/core/wmem_max If now I test the number

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Argh. Yes, maybe that’s what I will need to do then. I’ll try it. Looks like the earliest vintage of UHD that’s available is Feb 2014 (v3.4.0), which is about 4 years after the Rev2 N210, I think. So that UHD version may still be too recent to work with the Rev2 N210. That’ll be my last att

Re: [USRP-users] USRPs time wrong by factor of two

Fabian, My colleague also encountered this "factor of 2" bug and determined that it is present starting in 3.14. It's related to the tick/sample rates in the TwinRx Radio, and does affect timed commands as you suggest. In fact, the issue can actually be demonstrated using Ettus's example program "t

Re: [USRP-users] Timed frequency switching on multiple channels not possible

On 05/09/2019 09:05 AM, Fabian Schwartau via USRP-users wrote: Hi, is there any update regarding this issue? Ettus R&D is aware, and they're being looked at. Am 06.05.2019 um 10:36 schrieb Fabian Schwartau via USRP-users: Sorry for the late answer, I was busy. I tried that including a one s

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Joe, So I scratched my head about this a little late last night and looked back through the development repository for the N210 and as far as I can tell there was never customer facing FPGA code for a Rev2 N210. Chatting with Matt this morning he shared my feeling that a Rev2 wasn't sold to custome

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Moreover, the best "tell" is to look at the N210 motherboard. If the SRAM chip is on the top side, it's a rev 2/3. If the SRAM is on the bottom side, it's a rev 4. If you send a picture along of the top of the N210, I can tell you if it's early or late rev. On Thu, May 9, 2019 at 11:36 AM Ian Buck

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

On Thu, May 9, 2019 at 1:03 PM Michael Deacon wrote: > I hope this is what you are looking for. Would clipping here be an > indication of saturation? > Not quite. You may be able to look at the CCDF of the output and see if it hits a brick wall versus the "good" picture. I'd much prefer to see

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

You can use the DTV component in GNU Radio to output a known good OFDM signal. There are many DVB-T2 flow graphs in /share/gnuradio/examples/dtv Try vv009-4kfft.grc. A link to the test input file can be found in README.dvbt2. Depending on which version of UHD you're using, you may have to

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Ian and Nick, Thanks for the assistance. Attached are dropbox links to two snapshot photos: 1) the factory label on the back of the N210, showing N210 r:2.0 and 2) a top side view of the N210. 1) https://www.dropbox.com/s/u92x02rni71kfb3/20190509_133253.jpg?dl=0

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Ian, Yes, I have tried many times to boot in safe mode, same result regardless. Yes, I am able to pin to 192.168.10.2 successfully. Joe > On May 9, 2019, at 1:47 PM, Joe Martin via USRP-users > wrote: > > Ian and Nick, > > Thanks for the assistance. Attached are dropbox links to two sn

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

…able to ping 192.168.10.2 successfully. > On May 9, 2019, at 1:54 PM, Joe Martin wrote: > > Ian, > > Yes, I have tried many times to boot in safe mode, same result regardless. > Yes, I am able to pin to 192.168.10.2 successfully. > > Joe > >> On May 9, 2019, at 1:47 PM, Joe Martin via US

Re: [USRP-users] Relationship between IQ values, gain and noise on B205mini transmitter

On 05/09/2019 03:01 PM, Brian Padalino via USRP-users wrote: I'd much prefer to see an IQ constellation diagram. For OFDM it'll just look like a big Gaussian meatball unless you hit some clipping or weirdness, then you'll see it square up or look strange. Brian If "Big Gaussian Meatball" i

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Well, it's not a rev 4. It's either 2 or 3 in terms of hardware revision. On Thu, May 9, 2019 at 12:58 PM Joe Martin wrote: > …able to ping 192.168.10.2 successfully. > > On May 9, 2019, at 1:54 PM, Joe Martin wrote: > > Ian, > > Yes, I have tried many times to boot in safe mode, same result >

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Okay. I’ve asserted from the outset that it’s a rev 2, based on the factory label. Is this N210 a lost cause if it is actually a Rev2 N210? Joe > On May 9, 2019, at 2:05 PM, Nick Foster wrote: > > Well, it's not a rev 4. It's either 2 or 3 in terms of hardware revision. > > On Thu, May 9,

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Nick, Ian, If this unit happens to be incorrectly labeled as a rev 2 N210 and it is actually a rev 3 N210, is there hope in being able to load rev 3 firmware and fpga images (which I have located previously and tried actually) with some available UHD version? If so, would you be able to tell

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

On 05/09/2019 04:18 PM, Joe Martin via USRP-users wrote: Nick, Ian, If this unit happens to be incorrectly labeled as a rev 2 N210 and it is actually a rev 3 N210, is there hope in being able to load rev 3 firmware and fpga images (which I have located previously and tried actually) with some

Re: [USRP-users] How to periodically write files using USRP and GNUradio

Great additions and changes. Everything seems to be working smoothly on our end. Realtime scheduling is an important option I forgot to enable. Future users should use that. On Sun, May 5, 2019 at 1:18 PM GhostOp14 wrote: > I folks, to complete the timing set, I also just added another timer > m

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Thanks for the info, Marcus. However, seeing that Jason went through this last year with a couple of N210 he has it would seem unlikely that all three of the N210 are broken. That being said and considering what you jus said it seems that I should’ve been able to find some version of UHD that

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

So I really dug into the old archives here and literally pulled an old hard drive out of a closet, and found a copy of the old hardware repository from back in the days when N210 was called "USRP2+". Best that I can tell, we only ever released two versions to the public. We might have sold R3 stick

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Thanks for digging into that for us, Nick. Interesting. As the hardware change to rev4 occurred around mid 2011 and the earliest UHD version that exists on the files.ettus.com/uhd page is Feb 2104, what is the likelihood in your opinion that the UHD version will be

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

I'm saying that you might try to continue the effort to JTAG load a more modern FPGA image. It's possible you have to hold down the safe mode button while loading the image. On Thu, May 9, 2019, 2:22 PM Joe Martin wrote: > Thanks for digging into that for us, Nick. Interesting. As the hardware

Re: [USRP-users] Need a little help with running legacy prebuilt UHD versions

Oh, okay, I didn’t get that. Understood now. I have UHD 3.14.0 running on my main machine so I could try again some newer .bit files into the FPGA than I previously have tried (I tried the current version of UHD and N210 usrp_n210_r4_fpga.bit to no avail) to see if any of them are compatible.