Dear Sir, Dear Madam,
I am RF design Engineer and I have a Question about the OpenBTS Project.
Does it support the Frequency Hopping or not?
Sincerely yours,
Chaouki
_
Consultez vos emails
On 04/08/2010 12:55 AM, Marcus D. Leech wrote:
I managed to get GRC up.
But when I try to run an application that uses anything graphic, it
segfaults, and dumps core, from
deep within libdricore.so -- related to OpenGL, I think?
So, rip out the GUI stuff.
Use my 4-channel audio-type SID rec
On 04/08/2010 12:07 AM, Jeannette Nounagnon wrote:
Hello,
I have a Beagle Board running Gnuradio(3.2.1). I copied the
gnuradio-examples folder from Gnuradio (3.2.2) on the Beagle Board (BB).
When I run the usrp_benchmark_usb, I get a maximum throughput of
4MB/sec, instead of 32MB/sec on my regul
On 04/08/2010 07:50 AM, Philip Balister wrote:
> On 04/08/2010 12:55 AM, Marcus D. Leech wrote:
>> I managed to get GRC up.
>>
>> But when I try to run an application that uses anything graphic, it
>> segfaults, and dumps core, from
>>deep within libdricore.so -- related to OpenGL, I think?
>>
On 04/08/2010 08:23 AM, Marcus D. Leech wrote:
On 04/08/2010 07:50 AM, Philip Balister wrote:
On 04/08/2010 12:55 AM, Marcus D. Leech wrote:
I managed to get GRC up.
But when I try to run an application that uses anything graphic, it
segfaults, and dumps core, from
deep within libdricore.s
Hi,
So, if i am setting interpolation rate 16 at transmitter
side(tx_samples.cc), according to the equation the program is sampling at
Sampling rate = 400/16 = 25M samples/sec.
but, I am able to receive the data only at the same decimation rate
16(rx_streaming_samples.cc) , for which
On 04/02/2010 04:42 AM, Andrew Rich wrote:
Hello
I am interested in scanning from 1000 MHz to 1200 MHz
Can the USRP and gnu radio down convert and show me a spectrum ?
Second question. Can the USRP be used to sweep filters ?
Andrew
You can use the USRP as a spectrum analyzer, but you'll need t
Thank you so much Johnathan. Is that means the signal is converted before ADC?
I'm quite confused about how the FPGA configuration connect with host code. The
FPGA bitstream is loaded by usrp.source_c or usrp.source_s. Where is the FPGA
bitstream loaded into? How does the usrp source class load
Krishna,
My understanding is that we can regard the sample rate of the DAC and
ADC as 100MHz (although the DAC uses internally a larger rate, this is
what I have read). Thus the rate at which samples are leaving or
entering the RF sections at are 100MHz. The maximum rate at the host
side is
> As i am dealing with RF communication i need to know exactly what sampling
> rate
> the USRP2 is sampling the data and sending over the air ?
This has been detailed before on this list, so you can find a more
complete explanation by searching the archives.
On the transmit side, there are *two*
On Thu, Apr 8, 2010 at 08:30, Johnathan Corgan
wrote:
> In the case it is configured to interpolate by 4, then the USRP2 will
> consume samples from the GbE port at 25 Msps, or 800 Gbps + overhead.
Um, that would be 800 Mbps + overhead. But one could wish :-)
Johnathan
__
On 04/07/2010 09:10 PM, Jeff Brower wrote:
Matt-
About Vikram's 10/100 mode question, we were wondering if it's a design flaw;
i.e. something wrong from the start in
the original opencores.org source, or if it's fixable but hasn't been a high
priority item given USRP2's high data
rate requirem
On 04/07/2010 05:58 PM, Vikram Ragukumar wrote:
Matt,
Thank you for your email.
The mac is all contained in simple_gemac, and above that in
simple_gemac_wrapper:
http://code.ettus.com/redmine/ettus/projects/fpga/repository/revisions/master/show/usrp2/simple_gemac
simple_gemac_wrapper in the fi
Is GRC able to create Hierarchical Blocks with more than one Sink /
Source?
I tried to create such a Hierarchical Block in the following way which
failed:
In a blank GRC-File, I assigned in the Options-Block ID
(hierblocktest), Title (hier block test), Generate Options (Hier
Block) and
I added the ability to have multiple pads a few months ago. I believe that
it works. Make sure that your git clone is recent enough ( im not sure about
the version) and make sure that there is not this issue of multiple gnuradio
installs (and possibly importing old grc modules).
-Josh
On Thu, Apr
Is there a simple, cheap way to combine the outputs of two daughterboards into
a single signal before sending them on to a power amplifier?
I need to generate a slow-hopped frequency hopping system that has nine
channels spread out over 200MHz of spectrum from 5260MHz to 5460MHz. What I
would l
Hi,
I am trying to use the head block in GRC to limit the amount of dat written to
a file. Currently I have a very basic configuration set up in GRC with a file
source(text data) set to repeat going into the head block going into a throttle
to control the sampling rate and going into a file si
Matt-
>> About Vikram's 10/100 mode question, we were wondering if it's a design
>> flaw; i.e. something wrong from the start in
>> the original opencores.org source, or if it's fixable but hasn't been a high
>> priority item given USRP2's high data
>> rate requirements. But then I found this p
On Thu, Apr 8, 2010 at 4:20 PM, Bahn, William L CTR USAF USAFA
USAFA/DFCS wrote:
> Is there a simple, cheap way to combine the outputs of two daughterboards
> into a single signal before sending them on to a power amplifier?
>
> I need to generate a slow-hopped frequency hopping system that has
On 04/08/2010 04:20 PM, Bahn, William L CTR USAF USAFA USAFA/DFCS wrote:
> Is there a simple, cheap way to combine the outputs of two daughterboards
> into a single signal before sending them on to a power amplifier?
>
> I need to generate a slow-hopped frequency hopping system that has nine
> ch
> [...] very basic configuration set up in GRC with a file source(text data)
> set to repeat going into the head block going into a throttle to control
> the sampling rate and going into a file sink.
>
> For the head block I have played around with the Number of Items and
> Vector Size parameters.
I did some measurements this afternoon after I got home from work.
Using a naive test loop, I was able to observe roughly 11.5M
multiply-accumulates per second.
That's not enough for any serious wideband work, but it'll do for simple
audio processing.
I'm going to muck about with my VLF SID rece
1) Has this configurable bit-width revision been merged? I could not see
the rx_buffer.v modifications in 3.2.2 nor any modifications towards this
feature on the host side.
2) Is there any branch doing the required modifications on the host side? I
want to decide on whether to revisit my non-wor
http://www.sbrac.org/files/audioSIDnoGUI.py
http://www.sbrac.org/files/audioSIDnoGUI.grc
It can only handle two channels, and it takes 78% of the CPU while doing
it, but it does work!
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
___
Hi All
I am using a pair of USRP2s, each equipped with a XCVR2450, for transmission
over-the-air of an RRC-filtered BPSK signal. The Tx antenna has 3dBi gain, and
the Rx antenna has 18 dBi gain. The transmitted signal is at maximum amplitude,
with gain set to 30 dB. The clocks on each end of th
I fetched the gnuradio code yesterday and installed it on Ubuntu 9.10.
It's the only gnuradio install.
Here are the generated .py and .py.xml files and the .grc-file:
#!/usr/bin/env python
##
# Gnuradio Python Flow Graph
# Title: testhierblock
#
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