offsetting your input tone to 900.1 MHz and see if it
shows up.
John
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, and additional details can
be found at our website:
http://epiqsolutions.com/matchstiq/
Regards,
John
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https
to
achieve this.
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you get into the new bulk streaming mode). Could make for a very
interesting multi-transmit/multi-receive system (assuming you've got a PC
that can actually do something with that much data coming in, which is still
a big challenge).
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http
, but it may very well
take a few tens/hundreds of samples before it is completely corrected,
which lines up with what you're seeing.
Try changing your sig gen to output a tone at, say 100 Khz from your
RF tuning frequency, and it should not attenuate over time.
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at:
/path to GNU Radio install/usrp/host/apps/burn-db-eeprom
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the patience
of everyone who has been waiting for this support to be added in, and
stay tuned for additional hardware and software announcements
throughout 2011.
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interface, what exactly do you mean? Do you mean the value 100 in
decimal repeatedly? If so, this is a DC signal with no frequency
content, and DC offset correction could be wiping it out. If not, can
you elaborate more on the data values that you're sending?
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a technical standpoint, we've been monitoring progress/changes
with the UHD, and it seems reasonably stable at this point. We can
revisit adding support in for the BURX board if there was interest in
this, and prioritize it accordingly.
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with the 3.3.1 release. You can find details on this
daughterboard at our website:
http://www.epiq-solutions.com/products_overview.php
We have customers who are using it for WiMAX signal processing, so it
should be a good match for your needs.
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at 230.4 Kbps (the
rate of the UART on the USRP2).
We've instrumented the USRP2 firmware at different times with debug
messages to understand what is going on, but that is about it. It can
be very helpful for the right situation.
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with this sort of email, but your efforts
to make GNU Radio into what it is today is very appreciated.
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. You'll also want to make sure the gnd
reference point for the scope is as close to the measurement point as
possible to ensure that you aren't picking up stray
signals/interference.
Good luck, and keep the list posted of progress. Sounds like quite a
challenging project :-)
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a USRP1 modified to accept an external clock, or a
USRP2 that has undergone the non-trivial modification mentioned above,
having the A/D converters run at a multiple of 13 MHz reduces the
computational load on the host machine.
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response?
You should be able to get a flatter gain throughout by more
carefully selecting your gain settings.
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clocks.
But you will need to tweak the aeMB firware to make this happen.
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recognized (both tx and rx EEPROMs),
and benchmark_rx_rate passes all tests successfully. Must have had an
intermittent connection.
Thanks Josh.
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traffic of other folks using UHD + the RFX2400, such as:
http://www.mail-archive.com/discuss-gnuradio@gnu.org/msg24051.html
...so I'm fairly certain the RFX2400 is supported. Any ideas as to
what the issue could be here?
Any insight is appreciated.
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we'll get support added in.
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, and we'll update the wiki as appropriate. If you're
interested in an account to post content to the wiki, please email us
at contact (at) epiq-solutions.com and we'll get you setup.
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the source file that
is modified, perform the proper linking, and will emit the series of
.bin executable files into the apps directory. This is the standard
way of re-building after code modifications for the USRP2.
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On Mon, Jun 21, 2010 at 3:35 PM, John Orlando j...@epiq-solutions.com wrote:
On Mon, Jun 21, 2010 at 3:10 PM, Bryan Edelman bedel...@its.bldrdoc.gov
wrote:
Hello all,
As I am not an expert on linux/compilers by a longhop I have a question
about the proper way to build a dependency after
it is possible.
Are there any source code examples for USRP1 ? I need to have an idea of
where to start and how to interface USRP2 and to control it.
I'm assuming you've seen this:
http://www.cel.kit.edu/downloads.php
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. Then, you can
measure the value of the signal you are receiving (either manually in
your application or by viewing the samples with a graphical tool such
as using usrp_fft.py) and calibrate against this.
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On Wed, Jun 9, 2010 at 6:07 AM, Martin DvH gnuradiom...@olifantasia.com wrote:
The gnuradio.org server seems to be down. (9 Jun 2010)
Even a ping times out.
Hmm...works for me in the US (Illinois).
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bandwidths would be useful?
-how much RF power output would be useful, and at what frequencies?
All feedback is welcome and appreciated. If the interest is there,
we'd likely have the most requested boards available to the public in
the September/October timeframe.
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John Orlando
CEO/System
, and one digitizing the
Q channel. Google for zero IF receiver and you'll find more
details.
The 20 MHz low-pass filters are there to reduce wideband noise, and to
help with anti-aliasing. They don't imply that there is a mandated 20
MHz IF.
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that it can be
transfer trough usb 2.0 which have the bottleneck at 32Mhz am i correct?
Sounds right to me.
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).
That being said, these VCOs can typically be tuned lower in frequency
(or higher) than the min/max frequency specs, but you'll likely see
additional phase noise, and you'll be running outside the expected
operating range of the chip, which is generally not ideal. But it can
be done.
--
John
On Wed, Jun 2, 2010 at 4:29 PM, Matt Ettus m...@ettus.com wrote:
On 06/02/2010 02:06 PM, John Orlando wrote:
On Wed, Jun 2, 2010 at 3:54 PM, Sharif Shaherssha...@steelriver.com
wrote:
Hello,
I am trying to tune the WBX to 60MHz, but everytime I do
I get an error. If I do it through
are the command to type...?
$ gcc db_dbsrx.c..and what else? which option have i to add to
compile it?
You shouldn't be calling gcc directly here. You just need to call
'make' from the firmware directory, and it will re-build your changes.
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board will be made available in
the coming weeks on
the BURX product page, so stay tuned.
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).
If there is any interest here, we'd be happy to submit a patch to the FPGA
codebase to add this capability in. And for people who don't need it, the
block can simply be bypassed.
Comments welcome...
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On Tue, Apr 13, 2010 at 1:54 AM, Johnathan Corgan
jcor...@corganenterprises.com wrote:
On Mon, Apr 12, 2010 at 15:27, John Orlando j...@epiq-solutions.com wrote:
However, as soon as I try to change the gain via the usrp2_fft.py GUI,
I get an 'O' character spit out on the USRP2's serial port
into the gigE port on a Lenovo
T400/Core 2 Duo laptop running FC12 (32-bit)...I've also tried this on
an Acer 8940 with a Core I7 running FC12 (64-bit)...same issue on both
Any help would be appreciated...thanks.
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). If this is the case, there is an RRC filter at the
last DSP stage typically, so your suggestion for folding this
re-sampling in is spot-on.
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diagnose what's going on.
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MHz, how the clk div 2
occurs on the USRP2?
Thanks much...
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On Tue, Mar 16, 2010 at 04:34:44PM -0500, John Orlando wrote:
Hi all,
Just looking through the WBX daughterboard code in the latest git repo
for adding support for the USRP2 (which can be found at
usrp2/firmware/lib/). I noticed that in adf4350.c, there is a #define
for INPUT_REF_FREQ
would be appreciated.
Our DBSRX is from rev 2.2, dated 2007.
Thanks much.
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.
The BURX daughterboard is our first step in this process, and we are
excited to contribute to the hardware and software ecosystem of the
USRP and GNU Radio.
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daughtercard using these, nor did grep find any
reference to these in the 3.2.2 release of GNUradio. Is there any way
to send/receive UART data to these lines from within GNUradio? If
not, what was the intent with these lines?
Thanks much...
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John Orlando
CEO/System Architect
Epiq
On Tue, Jan 19, 2010 at 11:55 AM, Matt Ettus m...@ettus.com wrote:
On 01/19/2010 09:41 AM, John Orlando wrote:
Hi all,
A while back I noticed there are two signals called RS232_RXD and
RS232_TXD exposed on the PMC connector going to the daughtercard slots
on the USRP. Tracing these back
to that to see if I could get a definitive answer.
Thanks much...
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On Mon, Jan 11, 2010 at 3:04 PM, Eric Blossom e...@comsec.com wrote:
On Mon, Jan 11, 2010 at 10:51:09AM -0600, John Orlando wrote:
Hi Matt,
In reviewing the schematic of the dbsrx daughtercard, I noticed that
there
are two i2c devices (the EEPROM and the MAX211x receiver chip
be. Couldn't find much on
the mailing list or internet to point me down the right path. Anybody got
any ideas?
Thanks for the bandwidth.
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On Sat, Jan 9, 2010 at 9:58 AM, Eric Blossom e...@comsec.com wrote:
On Sat, Jan 09, 2010 at 08:16:01AM -0600, John Orlando wrote:
Hi all,
I'm working with GNUradio 3.2.2 on an Ubuntu 8.04 x86 box. I'm in the
process of making some modifications to the source that builds libusrp
On Fri, Oct 23, 2009 at 7:08 PM, Matt Ettus m...@ettus.com wrote:
John Orlando wrote:
Hi all,
I was just reading the specs/schematic on the LFRX RF daughterboard,
and noticed that the literature indicates that there is a 30 MHz
low-pass filter after the differential amplifiers. Looking
into account some input
capacitance on the A/D converter on the USRP (10-20 pF?), it still
would be larger than 30 MHz. Am I missing something here?
Thanks much,
John Orlando
www.epiq-solutions.com
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