I did some experiments tonight, to check the sensitivity of the
BASIC_RX, to try to decide how much
gain I really need in front of it for one of my projects.
I have a signal at about -32dBm, and verified the pk-pk voltage on a good
oscilloscope, using a 50-ohm load in front of the scope, to ma
Hi Josh,
How is the sustained rate when you simultaneously run
rx_streaming_samples (without dump) and dd?
:-)
Acutally, the result I got is more than unexpected. :o)
Running dd in one terminal and rx_streaming_samples in a second terminal
gives me this:
Terminal 1:
|> dd if=/dev/zero
Oops.. typo
If I read directly from /dev/urandom the whole performance goes down
as random numbers can be generated fast enough
If I read directly from /dev/urandom the whole performance goes down as
random numbers can't be generated fast enough
__
Hi,
Try /dev/random instead of /dev/zero. SSDs are known to use data
compression algorithms to run-length-encode drive data on the fly, to
increase bandwidth and reduce data replication on the drive. It's
possible that your drive is performing write optimization on your test
which is not applica
Nick Foster writes:
> > > dd if=/dev/zero of=/SSD/test.bin bs=1000K count=1000
> > 1000+0 records in
> > 1000+0 records out
> > 102400 bytes (1.0 GB) copied, 9.76347 s, 105 MB/s
> >
>
> Try /dev/random instead of /dev/zero. SSDs are known to use data
> compression algorithms to run-length-en
On Wed, 2010-10-06 at 13:17 +0900, Thomas Hobiger wrote:
> Dear all,
>
> Thanks for all the comments and suggestions.
>
>
> > Can you benchmark your hard disk for sustained rate?
>
> Here are the results from a simple DD test
>
> > dd if=/dev/zero of=/SSD/test.bin bs=1K count=100
> 10
How is the sustained rate when you simultaneously run
rx_streaming_samples (without dump) and dd?
:-)
Here are the results from a simple DD test
|
> dd if=/dev/zero of=/SSD/test.bin bs=1K count=100
100+0 records in
100+0 records out
102400 bytes (1.0 GB) copied, 11.5431 s, 88.
On Sep 7, 2010, at 7:28 AM, Michael Dickens wrote:
> I've updated the GNU Radio install via MacPorts to 3.3.0.
I'm sorry that I'm so terribly late trying this out, but I got distracted from
working with gnuradio stuff for a while. I finally got around to trying this
tonight, and it seems to be
Dear all,
Thanks for all the comments and suggestions.
Can you benchmark your hard disk for sustained rate?
Here are the results from a simple DD test
|
> dd if=/dev/zero of=/SSD/test.bin bs=1K count=100
100+0 records in
100+0 records out
102400 bytes (1.0 GB) copied, 11.5431
On 10/05/2010 09:35 PM, Thomas Hobiger wrote:
> Hi everybody,
>
> I am running a USRP2 with a DBSRX and talking to the hardware via raw
> ethernet. Running GRC goes well (e.g. doing a real-time FFT spectrum),
> but when I start recording on disc I get many "S" messages ("2
> successive packets whic
Raid 0 with sata3 drives or 15k scsi drives maybe?
Or if your rich...
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227499&Tpk=OCZSSDPCIE
Sent from my iPad
On Oct 5, 2010, at 11:18 PM, Tom Rondeau wrote:
> On Tue, Oct 5, 2010 at 10:10 PM, Josh Blum wrote:
>> Can you benchmark your
On Tue, Oct 5, 2010 at 10:10 PM, Josh Blum wrote:
> Can you benchmark your hard disk for sustained rate?
>
> I don't think that most disks, even SSD,s can sustain a write rate of 25Msps
> @ 4 bytes a sample (if you are capturing shorts) = 100MB/s
>
> -Josh
>
> On 10/05/2010 06:35 PM, Thomas Hobige
Can you benchmark your hard disk for sustained rate?
I don't think that most disks, even SSD,s can sustain a write rate of
25Msps @ 4 bytes a sample (if you are capturing shorts) = 100MB/s
-Josh
On 10/05/2010 06:35 PM, Thomas Hobiger wrote:
Hi everybody,
I am running a USRP2 with a DBSRX an
Hi everybody,
I am running a USRP2 with a DBSRX and talking to the hardware via raw
ethernet. Running GRC goes well (e.g. doing a real-time FFT spectrum),
but when I start recording on disc I get many "S" messages ("2
successive packets which do not have 2 successive sequence numbers")
after
Hello:
What is the roadmap for GNU Radio releases over the next 12 to 18
months?? What new features are planned?? Will the next release be a
minor release (3.3.1), or major release (3.4.0)?? When is the next
release planned for?? Any insight is much appreciated. Thanks.
--Sunil
hi,
i'm a long time lurker here but not very active or skilled on softradio
so i could have miss any reference about a newly entered project in the
opencores web site:
http://opencores.org/project,dvbt_core
do anyone know about this project? is this core supposed to run on the
USRP2?
doe
On 10/05/2010 04:30 PM, hafiz zimran wrote:
> Hi
> We have received USRP2 with WBX and LP0926 PCB Antenna on 19 August,2010.
> We are trying to receive GSM spectrum ( Above 900MHz) but we are
> getting the error USRP2: Channel 0 not receiving
> USRP2: rx_samples(0 failed.
>
> When we run the comm
Hi
We have received USRP2 with WBX and LP0926 PCB Antenna on 19 August,2010.
We are trying to receive GSM spectrum ( Above 900MHz) but we are getting the
error USRP2: Channel 0 not receiving
USRP2: rx_samples(0 failed.
When we run the command sudo usrp2_fft.py -f 900M , we are getting the same
This sounds like a good idea. I voted for it.
-William
On Fri, Oct 1, 2010 at 3:38 PM, chris.cauley wrote:
>
> I'm looking to start a stack exchange site for gnuradio. I'm new to using
> gnuradio and I think this would be an excellent resource for asking
> questions on how to use gnuradio. If an
Hello,
I'm trying to figure out how to measure the impulse response of a channel
its coefficients.
If you have any information on how to do that, please let me know.
Thank you.
- Jan
--
View this message in context:
http://old.nabble.com/How-do-you-measure-the-channel-impulse-response--tp2
On Tue, Oct 5, 2010 at 5:46 AM, SergeNJ wrote:
> If I want use one Antenna for RX-TX on WBX ?
> I tried RXTX input and it have a lot less level on RX than RX2 ... in
> software i choose TXRX but always better level on RX2
> why?
Serge,
That should not be the case, but it is always possible t
Hi List,
If have a special application were I use two USRP2 with XCVR2450.
Sometimes the two USRP2s transmit, sometimes they receive, but sometimes
one of them transmit and the other receives.
My understanding is that I will have to create to simple_usrp objects,
because with mimo_usrp either all
Matt
If I want use one Antenna for RX-TX on WBX ?
I tried RXTX input and it have a lot less level on RX than RX2 ... in
software i choose TXRX but always better level on RX2
why?
Thanks Serge
It is just like the RFX-series. Use the TX/RX port for transmit, and
use the RX2 port for rec
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