Hello,
We are running gnuradio v 3.7.8 on Ubuntu 15.08. H/W is B210.We are
looking at our self echo from EME (moon bounce).
When running uhd_fft, we see clear EME echo signals on the FFT display (10-20
db above the noise). However, we don't see these signals on the waterfall
display
Hello,
We have been experiencing occasional "CODEC loopback test" failures when
using a B210.
A very similar problem was reported at
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2015-September/015645.html
In our case* the problem happens roughly once per every 20 attempts. We
On Sep 9, 2015, at 12:46 PM, Tom Rondeau wrote:
> On Wed, Sep 2, 2015 at 3:51 PM, Daniel Marlow wrote:
> Dear All,
>
> We are experiencing unexpected behavior with the time stamps in the meta
> file headers. It
> appears that in cases where the flowgraph experienc
Dear All,
We are experiencing unexpected behavior with the time stamps in the meta file
headers. It
appears that in cases where the flowgraph experiences data drops, the timestamp
is properly
updated. However, in cases, where the flowgraph hits the maximum segment size
(4 MB in our case)
PT signal enough to answer this. In principle, for the 100MHz devices
> (N210/N200), 4MS/s is a suboptimal rate, since the decimation (25) is odd,
> and I'd try with something less strange, like 5MS/s.
>
> Best regards,
> Marcus
>
> On 06/30/2015 10:49 PM, Daniel Marl
Hello,
In the gnuradio/gr-noaa/README file under usrp_rx_hrpt.py, there is a
comment that
reads as follows:
"The present HRPT demodulator is only tested at decimation 16.The only other
valid decimation rates are 24 and 32, which may work, but with more bit errors.
No
other decimation r
Hello, OS: Ubuntu 14.01.1 gnu-radio: 3.7.6 Dell Optiplex 765 I am having trouble using the B210 USRP in two channel mode. Things work well when I use grc to configure the B210 with one channel, but when I try using two channels, I get the error shown below. This is quite simila
No, I didn't. And I am not sure why not, since it made it work so much better!
Seriously . . . thanks for the help. I should have known that.
Cheers,
Dan
On Dec 23, 2014, at 11:56 AM, Marcus D. Leech wrote:
> On 12/23/2014 08:47 AM, Daniel Marlow wrote:
>>
>> De
Dear All:
OS: Ubuntu 14.01.1
gnu-radio: 3.7.6
Dell Optiplex 765
I want to use the moving_average_vff block from specest, which is not
available in GRC. I tried installing gr-specest using pybombs (gnuradio was
already installed on this system using "/usr/local/build-gnura
On Nov 3, 2014, at 5:59 PM, Marcus D. Leech wrote:
> On 11/03/2014 05:55 PM, Daniel Marlow wrote:
>>
>> Hello,
>>
>> We are using a TVRX2 board with a N200 USRP.Until recently, the
>> system was working properly with two channels using the attached f
Hello,
We are using a TVRX2 board with a N200 USRP.Until recently, the system
was working properly with two channels using the attached flowgraph.For
reasons that are unclear, it stopped working and is no longer capable of two
channel operation (if we set the Num channels parameter
On Oct 11, 2014, at 5:38 PM, wrote:
> I can't wrap my head around why fft transform of complex signal produces a
> complex output. After all the output reflects the amount of energy per
> frequency bin and frequency bins and energy are both real numbers, no?
>
> I'm trying to write a python
On Oct 4, 2014, at 6:39 PM, Marcus D. Leech wrote:
>>
>> On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote:
>>
>>> If you put your flow-graph itself (.grc file) somewhere, or attach it, we
>>> can take a better look.
>>>
>>> What kind of comptuer? (OS, CPU/MEM specifics, etc).
>>>
>>>
>>>
On Oct 3, 2014, at 7:49 PM, Jeff Long wrote:
> Dan,
>
> If you execute the various "sudo sysctl ..." lines shown in the warnings,
> does it work any better? You can make these permanent.
>
> man sysctl.conf
>
> - Jeff
>
>
Hi Jeff,
Thanks for the suggestion.We will give that a try
On Oct 3, 2014, at 7:30 PM, Marcus D. Leech wrote:
If you put your flow-graph itself (.grc file) somewhere, or attach
it, we can take a better look.
What kind of comptuer? (OS, CPU/MEM specifics, etc).
--
Marcus Leech
Principal Investigator
Sh
7746092
On Aug 21, 2014, at 6:03 PM, Tom Rondeau wrote:
> On Tue, Aug 19, 2014 at 3:13 PM, Daniel Marlow wrote:
> Hello,
>
>I am trying to add some extra information to the standard metadata file
> header.
>
>Following the information posted on
> http://gnu
Hello,
I am trying to add some extra information to the standard metadata file
header.
Following the information posted on
http://gnuradio.org/doc/doxygen/page_metadata.html , I am able to write and
read the standard metadata.I have attempted to add extra metadata with the
follo
Hello J,
You can find some details on this at URL: http://radioware.nd.edu/documentation/basic-gnuradio
It sounds like much of this will be old hat to you, but there is a
section entitled "Exploring the FM receiver," which addresses at least
some of your specific question.
Sincerel
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