[USRP-users] Long time for USRP N210 to respond -- is this v3.10, firewall problem, or something else?

Marcus D. Leech mleech at ripnet.com
Sun Mar 20 14:34:50 EDT 2016


On 03/20/2016 12:13 PM, Mendel, Susan Marie via USRP-users wrote:
> Marcus,
>
> I get the same long delay with uhd_usrp_probe but not with uhd_find_devices.
>
> Can I expect things to work OK through the firewall as long as I'm specifying the IP address or is it likely to cause other problems down the road?
>
> I'm going to try to install a released version now but I suspect  I will have the same problem. I was seeing a similar delay on a Windows laptop when I was trying to send data using the Matlab USRP support package. I didn't have the laptop long enough to trouble shoot the problem, which I'm guessing is in my system configuration some where.
>
> Thanks,
> Susan
My guess is that you have a network setup issue.  Either with your 
firewall configuration, or DNS.

Do you perhaps have more than one device that is visible to your 
computer that has the same address as the N210?


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> Subject: USRP-users Digest, Vol 67, Issue 20
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> Today's Topics:
>
>     1. RFNoc Signal Output (Eugene Chai)
>     2. Modelsim execute error for option -64 (Swanson, Craig)
>     3. Re: Long time for USRP N210 to respond -- is this v3.10,
>        firewall problem, or something else? (Marcus D. Leech)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 19 Mar 2016 17:48:46 +0000
> From: Eugene Chai <eugene at nec-labs.com>
> To: USRP-users <usrp-users at lists.ettus.com>
> Subject: [USRP-users] RFNoc Signal Output
> Message-ID: <8BBAC087-4F17-47D5-AF46-CED058E36479 at nec-labs.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi,
>
> I have an RFNoC block on an X310 with three input and one output port.  I used the addsub block as a starting point, and I?m working on the rfnoc-devel git branch.   The RFNoC block acts as a mux ? it  takes three continuous streams from the host PC, and selects one of them for the output.  However, during testing, the output signal seems to be discontinuous.  I?ve attached a plot of the output signal that I captured over the air with a second X310.  Does anybody know what could be wrong here?
>
> Thanks,
> Eugene
>
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> ------------------------------
>
> Message: 2
> Date: Sat, 19 Mar 2016 18:09:14 +0000
> From: "Swanson, Craig" <Craig.Swanson at gtri.gatech.edu>
> To: Jonathon Pendlum <jonathon.pendlum at ettus.com>
> Cc: "usrp-users at lists.ettus.com" <usrp-users at lists.ettus.com>
> Subject: [USRP-users] Modelsim execute error for option -64
> Message-ID: <1458410953798.64631 at gtri.gatech.edu>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Jonathon,
>
> I have not run a Modelsim simulation in about three months.  This week I decided to upgrade my uhd/fpga-src to the latest rev in git.
>
>
> I tried running the noc_block_qpsk testbench and I got the following error:
>
> Failed to open executable /opt/mentor/modelsim/modelsim_dlx/bin/../linuxpe/../linux_x86_64pe/vish in execute mode needed for the option -64.
> execv: No such file or directory
> ** Fatal: Unable to exec the GUI /opt/mentor/modelsim/modelsim_dlx/bin/../linuxpe/../linux_x86_64pe/vish.
>
> Do you have any ideas on where I can start looking for how to fix this error?
>
> Craig
>
>
>
> Craig F. Swanson
> Research Engineer II
> Information and Communications Laboratory
> Communications, Systems, and Spectrum Division
> Georgia Tech Research Institute
> Room 560
> 250 14th St NW
> Atlanta, GA 30318
> Cell: 770.298.9156
> http://www.gtri.gatech.edu<https://mail.gtri.gatech.edu/owa/redir.aspx?C=c20925f2f0af4dd29329ddf0701ecfff&URL=http%3a%2f%2fwww.gtri.gatech.edu%2f>
>
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> ------------------------------
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> Message: 3
> Date: Sat, 19 Mar 2016 14:25:29 -0400
> From: "Marcus D. Leech" <mleech at ripnet.com>
> To: usrp-users at lists.ettus.com
> Subject: Re: [USRP-users] Long time for USRP N210 to respond -- is
>          this v3.10, firewall problem, or something else?
> Message-ID: <56ED9999.2080409 at ripnet.com>
> Content-Type: text/plain; charset="windows-1252"; Format="flowed"
>
> On 03/18/2016 10:01 PM, Mendel, Susan Marie via USRP-users wrote:
>>
>>
>> In installing UHD on a new laptop, I very stupidly installed version
>> 3.10 instead of the latest release. I didn't use git clone -- I tried
>> but that failed, I think due to my firewall, so I grabbed the zip.
>>
>> When I send a command to the USRP N210, there seems to be a 30 second
>> or so delay before I get any response. For instance the command
>> tx_waveforms prints out "current send frame size" and then it will be
>> a long time before I see anything else. Things seem to work fine once
>> it starts sending. Using the same command on a computer with v3.8.4
>> installed and the same USRP, there is no long delay.
>>
>>
>> I haven't disabled the firewall because I may need permission to do
>> that. Meanwhile I'm specifying the USRP address in the command. Is the
>> firewall likely causing the delay?
>>
>> Secondly, if I were to try building an earlier version instead, what
>> all do I need to remove first? The lib64/uhd directory?
>>
>>
>> Thanks for any help
>>
>>
> A delay isn't normal.
>
> What happens if you use uhd_usrp_probe:
>
> uhd_usrp_probe --args addr=192.168.10.2       (or whatever the IP
> address of your N210 is)
>
>
>
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