Re: [Discuss-gnuradio] carrier signal dropping

[Charles Irick]

My apologies,
Distro: Ubuntu 9.04
Kernel: 2.6.28-17-generic
GNU Radio version: I'm pretty sure it's 3.2.2, I'm using the dev trunk
but svn doesn't seem to allow me to update right now.

It is indeed complaining about not being able to enable real-time
scheduling. Since you asked I assumed this was the issue and looked it
up. It turns out even though I set up the USRP2 to run as non-root by
changing the permissions of usrp2_socket_opener, this was the issue.
It seems to work fine as root. I'm guess the tx fifo was emptying
without scheduling? Is there anywhere that I can read up on this
real-time scheduling because I will definitely need to solve some
similar issues in the future.


On Wed, Jan 6, 2010 at 4:10 PM, Eric Blossom <address@hidden> wrote:
> On Wed, Jan 06, 2010 at 03:44:26PM -0500, Charles Irick wrote:
>> Hello,
>> I hooked my usrp2 up to a spectrum analyzer and tried using the signal
>> generator in gr-utils to see what I could get. The carrier signal
>> seems to be turning on and off and I'm getting a lot of peaks at
>> various frequencies probably from the carrier turning back on. Is this
>> a code issue, normal behavior, or something I'm doing wrong?
>>
>
> Exactly what command line did you use?
> What version of GNU Radio?
> Did it complain about not being able to enable real-time scheduling?
> What OS, distribution, hardware?
>
> In general, we can be of more use to you if you follow these tips:
>
>  http://gnuradio.org/redmine/wiki/gnuradio/ReportingErrors
>
> Eric
>