Mir Ali-4 wrote:
Yeah, I got it. I read in a tutorial and I understand now.
hi Ali,
what tutorial do you read for this? hope it will be useful to others
especially to me =) tQ
Adib
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Hi Gnuradio folks, :-)
how can i change the scrollarea size of grc ?
It is a little bit to small for my application. :-)
regards Markus
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feldmaus feldmann_markus at gmx.de writes:
Hi Gnuradio folks,
how can i change the scrollarea size of grc ?
I mean, ho can i change the size to greater than 2048x2048 ?
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Hi,
I would like to conduct an experiment with using BasicTX to send AM/FM
signal ( voice ) and have BasicRX to receive AM/FM signal.
Basically, a way to transmit voice and another way to receive voice
using USRP.
Do I need two USRPs for this task?
If I already have a USRP, is it true that I
Hi,
We've set up a test comparing a recieved white noise signal recieved by two
usrp2 recievers. The two receivers were clocked (1PPS and refclk) by a GPS
diciplined OCXO which outpus a 1PPS signal which is phase locked to the 10 MHz
reference. The daughterboard was the RFX400 configured with
I was just recently fighting with this, and Matt told me that I have
to modify the firmware to get the USRP2 to lock (or at least this is
the easiest way to get the lock). Have you modified the firmware yet?
You need to add
clocks_mimo_config(MC_WE_LOCK_TO_SMA);
in the main() function of txrx.c
We do call config_mimo(MC_WE_LOCK_TO_SMA) when we set up the usrp2 (before the
start of receiving). Is clocks_mimo_config() different from config_mimo()?
I also read about the troubles with config_mimo before revision 10471, but we
use 10899 of the software, so that problem should be solved i
And i still read in the thread Suitable Sink required something
about gr.message_sink and gr.msg_queues.
Both are written in c++, not python, further on gr.message_sink
is a sink and can not connected to another sink.
Is the gr.msg_queues a sink and source ?
message_sink, message_source, and
Hi,
I use USRP 1 and RFX2400..I try to find if the amplifier of the transmitter has
a non-linear region. Do you know anything about this topic? Is there a
non-linear region that i could find? I try to find a relation of P_in versus
P_out at the amplifier of the transmitter.
If there is only
Jason Uher jasonuher at gmail.com writes:
From your questions on the board I'm starting to wonder if your
application isn't complex enough that it would warrant being built in
strict python rather than GRC, it would certainly make your life
easier in terms of doing things like this:
Yes, my
On Thu, May 14, 2009 at 4:44 AM, Ulrika Uppman ulrika.upp...@foi.se wrote:
We do call config_mimo(MC_WE_LOCK_TO_SMA) when we set up the usrp2 (before
the start of receiving). Is clocks_mimo_config() different from config_mimo()?
This is correct. The host driver has the function call to
On Thu, May 14, 2009 at 6:01 AM, karda...@telecom.tuc.gr wrote:
I use USRP 1 and RFX2400..I try to find if the amplifier of the transmitter
has
a non-linear region. Do you know anything about this topic? Is there a
non-linear region that i could find? I try to find a relation of P_in versus
Dear all (especially people working on BBN code with USRP2),
I know that some of you are working on simple_mac, higher modulation
rates and so on.
From my side I decided to spend some more time in understanding why the
bbn_802.11_tx.py doesn't work when trying to receive with real 802.11
I want to make a experiment by generating interferer using Benckmark_tx.py on
RX2400 daughter board. I am confused when I want to control the transmit
power. How can I control the power. With set_gain(), I see no difference.
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Hello!
I have a question regarding vector_source_c:
After the
src = gr.vector_source_c (xxx, 1) where xxx is a list of samples
self.connect (src, dst) where dst is the ursp
and having started the flow (fg.start())
is it possible to change/append/add values to the complex vector (src
in the
We do call config_mimo(MC_WE_LOCK_TO_SMA) when we set up the usrp2 (before
the start of receiving). Is clocks_mimo_config() different from
config_mimo()?
This is correct. The host driver has the function call to cause the
USRP2 clock to synchronize with an external reference on the SMA,
I want to make a experiment by generating interferer using Benckmark_tx.py on
RX2400 daughter board. I am confused when I want to control the transmit
power. How can I control the power. With set_gain(), I see no difference.
If I remember correctly the RFX boards do not have controllable
On Thu, May 14, 2009 at 7:32 AM, Juha Vierinen jvier...@gmail.com wrote:
Ok. I managed to get a lock only after modifying the firmware. Is
there some example for doing this on the host, I'm just wondering what
I did wrong.
Calling:
-config_mimo(MC_WE_LOCK_TO_SMA)
...from your host code
Hi,
I am also experimenting with FM signals .
I am using a single usrp for RX/TX
TVRX board is used for reception
Basic tx for Transmission.
I am running two programs simultaneously in gnuradio
i am using the wfm_receiver example program in GRC for RX and a fm
transmission code at terminal
Hope
Hi,
I am also experimenting with FM signals .
I am using a single usrp for RX/TX
TVRX board is used for reception
Basic tx for Transmission.
I am running two programs simultaneously in gnuradio
i am using the wfm_receiver example program in GRC for RX and a fm
transmission code at terminal
Hope
Ulrika Uppman wrote:
Hi,
We've set up a test comparing a recieved white noise signal recieved
by two usrp2 recievers. The two receivers were clocked (1PPS and
refclk) by a GPS diciplined OCXO which outpus a 1PPS signal which is
phase locked to the 10 MHz reference. The daughterboard was the
Yes, my application is not complex, but not general. So there is no
support i think in grc.
Further on, if you make grc moduls, you have to use the sink and source
elements from gnuradio and can not process the input data through some
python functions.
connect(SOURCE(Gnuradio Source) ---
Thats a big flow graph! In pixels, how big should it be?
feldmaus wrote:
feldmaus feldmann_markus at gmx.de writes:
Hi Gnuradio folks,
how can i change the scrollarea size of grc ?
I mean, ho can i change the size to greater than 2048x2048 ?
Would someone mind explaining how to appropriately use the dbpsk
modulator, given a desired bit rate and carrier frequency? I can't
seem to figure out how excess_bw and samples_per_symbol affect the
parameters I ultimately want to set (bit rate and carrier freq).
Thanks,
Tom
modulator, given a desired bit rate and carrier frequency? I can't
seem to figure out how excess_bw and samples_per_symbol affect the
parameters I ultimately want to set (bit rate and carrier freq).
I would examine the 'pick_bitrate.py' file in the digital examples in
detail. This file shows
Hello,
I have 2 USRP model 1.
On the first one (called Alpha) I've put the Basic RX and the LFRX daughter
boards.
On the second one (called Beta) I've put the TVRX and the DBSRX.
I've connected both Alpha and Beta on a mac mini via the usb cables.
What I expect to do is a relative hudge bandwich
Is there anyway to change the limits of a slider variable during runtime in
grc?
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Josh Blum schrieb:
Thats a big flow graph! In pixels, how big should it be?
Yes that is a good Question. Generally it would be nice to
know how to change this, but i think 4096x4096 would be nice
for me, or maybe more for the students which proceed with my
task after me. :-)
regards Markus
No, currently the forms.slider cannot have its min and max changed
during runtime.
Usually, the work around would be to use more variables to scale the
output of the slider according to another variable:
output_value = scalar*slider_value + offset
where offset and scalar can also be
Josh Blum schrieb:
There is a block called gr.head (misc-head) that shuts-off after N
samples pass through.
I mean to cut off the last line in the file and append the new data
to the file. But as i saw this is still a performance problem, however
it would work for me, because i do not save
I found a solution to my previous problem of toggling a GPIO to indicate
transmit or receive for the LFRX and LFTX boards. It is posted here:
http://www.opensubscriber.com/message/discuss-gnuradio@gnu.org/4966537.html
Dustin
--- On Sun, 5/3/09, Dustin Torres dt20...@yahoo.com wrote:
From:
and you can always add custom blocks that you write:
http://gnuradio.org/trac/wiki/GNURadioCompanion#AddingCustomBlocks
But Custom Blocks rely on custom sinks and sources. I need to
process the data through an own python file sink method, with rotate
and time feature.
Or is this still possible
im trying to implement standard squelch into one of my flowgraps however
crashes when excuted.
a test flowgraph null source - squelch - null sink heres what i get in
top_block.py
##
# Blocks
##
Hi Andrea,
In the GNU Radio code base
(trunk/gnuradio-core/src/python/gnuradio/blks2impl) you can find DBPSK and
DQPSK modulators, which are used by the benchmark_tx/rx files found in the
gnuradio-example directory. I looked at the python code and the modulators
are using a raised cosin as the
fixed in gnuradio trunk r11033
_josh
davek wrote:
im trying to implement standard squelch into one of my flowgraps however
crashes when excuted.
a test flowgraph null source - squelch - null sink heres what i get in
top_block.py
##
# Blocks
Works! thanks
On Thu, May 14, 2009 at 6:49 PM, Josh Blum j...@joshknows.com wrote:
fixed in gnuradio trunk r11033
_josh
davek wrote:
im trying to implement standard squelch into one of my flowgraps however
crashes when excuted.
a test flowgraph null source - squelch - null sink heres
actualy, I set the wrong mux value so that the wave form is very bad. And I
set mux to 0x2310, it now work well.
James Byrne-2 wrote:
I'm encountering the same problem over where I am, and have come to the
same conclusion.
--
Posted via http://www.ruby-forum.com/.
are using a raised cosin as the TX/RX filter. Perhaps you can swap out that
filter with the barker filter to test if the bits are being decoded
correctly.
You will still need the RRC filter after barker coding. You can't
really send direct plus/minus one data to the USRP because you can't
Hello,
I don't encounter this problem anymore. Someone else was trying to debug the
code.
I tried to run both USRP2's on one machine with 2 gigabit ethernet ports. It
did not seem to work.
Does anyone know if it is possible to run both USRP2's on one machine?
Thanks,
Miklos Christine
On Mon,
Johnathan Corgan wrote:
On Thu, May 14, 2009 at 7:32 AM, Juha Vierinen jvier...@gmail.com
wrote:
Calling:
-config_mimo(MC_WE_LOCK_TO_SMA)
Johnathan
It will be grateful if python bindings for config_mimo,
sync_every_pps
are added to usrp2_base.h and usrp2.i in gr-usrp2.
(Until now, I
FYI,
Eric
---BeginMessage---
Hi,
just for information, if someone is interested: http://ofono.org/
bye, Matej
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