Is it possible to utilise USRP2 with a daughter board to receive a signal on
the Ku band? I checked Ettus website but all the available daughterboards
have carrier frequencies less than the required.
What do you think?
Cheers,
Zohair
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That's great! I will do that. Thank you very much.
Zohair wrote:
>
> Is it possible to utilise USRP2 with a daughter board to receive a signal
> on the Ku band? I checked Ettus website but all the available
> daughterboards have carrier frequencies less than the required.
ct me to a usefull documentation regarding this issue, please?
Thanks
Zohair wrote:
>
> That's great! I will do that. Thank you very much.
>
>
> Zohair wrote:
>>
>> Is it possible to utilise USRP2 with a daughter board to receive a signal
>> on the K
Dear all,
I am trying to implement the DVB-S2 satellite standard which has two sample
rates:
30.9 MBaud OR 29.7 MBaud.
My question is : can USRP N210 sample at these sample rates?
I don't seem to be able to decimate the 100 MSps to these rates. is there
away to do this?
Would you direct me to
Hello everybody,
I'm working on building a block that accepts many inputs (say n) and has one
output. For a single output item to be generated, 100 samples from each
input port should be taken. How can I use forecast() and general_work() to
serve my purpose? I read somewhere that we never call or
Eric and Mir,
Thanks for the important infomation provided. I will try both of them and
reply to you.
Zohair
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but when I run it in GRC I
receive this message:
Traceback (most recent call last):
File "/home/zohair/Desktop/top_block.py", line 8, in
from gnuradio import myownhowto
ImportError: cannot import name myownhowto
I coped my matlab library (libmyfirstblock.so) to /usr/lib
When I type:
~$ sudo ldconfig
I receive:
/sbin/ldconfig.real: /usr/local/lib/libgnuradio-myownhowto.so.0 is not a
symbolic link
Zohair wrote:
>
> Hello everyone,
>
> Incorporating a MATLAB *.so library, I have created a block using the
> howto_square template. I al
10 at 11:57:24AM +0100, Zohair M. Abu Shaban wrote:
>>
>> Hi Eric,
>>
>> I have read what you recommended but still haven't understood what
>> the significance of this number is. I have another block that
>> generates a vector of 4 elements and the nout
out[i] = in[i] * in[i];
}
Zohair wrote:
>
> OK Eric. from what you've said I can understand that we cannot control
> noutput_items. All what we can do is return it from general_work(). It's
> solely for coordination issues and the runtime system takes control ov
Dear all,
How can I define a 3-input block io signatures if the inputs are:
1- two float vectors with length LENGTH1 each. (from 5 to 12)
2- a complex vector with length LENGTH1^2
output is:
float vector with length LENGTH2.
All what I dealt with before was inputs with same length but in case I
Oh That's makes sense. Thanks a lot.
Eric Blossom wrote:
>
> On Sat, Jun 12, 2010 at 05:21:43AM -0700, Zohair wrote:
>>
>> Dear all,
>>
>> How can I define a 3-input block io signatures if the inputs are:
>> 1- two float vectors with length LENGTH1 ea
Hi everyone,
I need to use several USRP2's in the same GRC programme (MIMO). Is there a
way to sychronise them to the same clock in GRC itself?
Best,
Zoh
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lp or
explanation of these three options, please??
Cheers,
Zohair
Zohair wrote:
>
> Hi everyone,
>
> I need to use several USRP2's in the same GRC programme (MIMO). Is there a
> way to sychronise them to the same clock in GRC itself?
>
> Best,
>
> Zoh
>
So guys, I want try to to modify the xml of the already existing
usrp2_source_ by adding these line at the end of the tag:
self.$(id).set_time_at_next_pps(time_spec_t(0,0))
time.sleep(1);
self.$(id).start_rx_streaming(0,time_spec_t(4,0))
So i set the time to zero at the next PPS, and make su
Dear all,
I am trying to modify the USRP2 block so that the timer is reset at the
beginning. I added this line to the make tag in the xml file:
self.$(id).set_time_at_next_pps(time_spec_t(0,0))
I receive this error:
Traceback (most recent call last):
File "/media/ZOHAIR/top_block.py&q
I also tried this:
zeroise=usrp2.time_spec_t(0,0)
self.$(id).set_time_at_next_pps(zeroise)
and receive:
Traceback (most recent call last):
File "/media/ZOHAIR/top_block.py", line 66, in
tb = top_block()
File "/media/ZOHAIR/top_block.py", line 35, in __init
ease?
Cheers,
Zohair
Josh Blum-2 wrote:
>
> Zohair,
>
> You can check what is in the module like so: python -c "from gnuradio
> import usrp2; print dir(usrp2)"
> ['MC_PROVIDE_CLK_TO_MIMO', 'MC_WE_DONT_LOCK', 'MC_WE_LOCK_TO_MIMO',
> &#
clock_config, what are the defaults?
3- In the runtime, how can I print the received packet timestamp to make
sure they are aligned?
Waiting to hear from you.
Best,
Zohair
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Sounds good! I will start working on this tomorrow and if I get it working
that's good. if not, I will wait till you push it.
Thanks a lot.
Zohair
Josh Blum-2 wrote:
>
>> 1- Is it enough to do this? Shouldn't I tell the USRP2 to start streaming
>> at
>> a sp
PREFIX
Any advice or help regarding this issue, please?
Best regards,
Zohair
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_
192.168.30.11 192.168.40.11, recv_buff_size=50e6 50e6 50e6
50e6
Does the block support multiple buffer resizing? or maybe I'm not
addressing the devices properly.
Looking foward to your reply.
Zohair
Zohair wrote:
>
> Dear Josh,
> I have successfully installed the UHD branch from
Dear All,
I know that the gr_complex data type is equivalent to
std::vector > but for my work with GRC, I need to use
UHD sources with double floating point precision. Is this possible or it is
hardware limitation?
Best regards,
Zohair
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has a
problem.
Best regards,
Zohair
Josh Blum-2 wrote:
>
> I pushed some changes to the uhd master that will check the deviation on
> the times between boards. This should help you to debug your setup. If
> you see an error message like the following, then you may have an issue
&
So if I leave the source float but in other block that I am writing the
precision is important and the output is necessarily double rather than
float. Will GRC recognise this? I checked the list for types from the help
menu and double data type is not there!
Any hint, please?
Cheers,
Zohair
deviation
Times set to 0 successfully!
Times set to 0 successfully!
gr_block_executor: source produced no output.
We're marking it DONE.
***
Any help, please?
Thanks again,
Zohair
Josh Blum-2 wrote:
>
> The errors below confirm my suspicion t
An extra peice of information is that the block is instable even with 2 and
three USRP2. This means sometimes it works and sometimes it producs no
output.
Zohair wrote:
>
> Dear Josh,
>
> I have sorted out the PPS signal problem. It was the splitter that has the
> problem and n
. These errors disappear when I power cycle the USRPs. Is
there anything I can do about this?
3- Also, sometimes a number of "O" characters get printed on the screen,
what does this mean?
4- What is the least sampling freq that I can use?
I am so glad that we have got something work
Hi Josh,
Just a quick note. I don't use ctrl+c to kill the graph. Instead I use the
kill button ( or F7).. Thanks again for the info provided.
Regards,
Zohair
Josh Blum-2 wrote:
>
>
>> It's working now! I changed it to 50ms instead of 10 and added the lines
>> i
3
N
N
4
int
(for some reason the param and /param tags may be hidden in my message)
So I mean I want to display the equation order on the block and hide N.
Any workarounds, please?
Cheers,
Zohair
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INUOUS);
_is_streaming = enb;
}
What happens is that it reads the first 1000 samples and this stops,
displaying a message that the block doen't produce any output.
Two heads are better than one ;) What do you thin guys?
Cheers,
Zohair
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Yes, I am interested in multiple bursts so Iam using the NUM_SAMP_AND_DONE
repeatedly.
If I understood what you've said correctly, hte following code may be
working. I havent tried it because I'm at home but would be grateful if you
tell me what you think of the modified code below.
Regards.
Hi Josh,
I have tried the code above and used a printing block with the following
work function and vec_len=1 to see the output of one of the MIMO source
output ports:
int library_print_c::work (int noutput_items, gr_vector_const_void_star
&input_items,gr_vector_void_star &output_items){
ore: 1685
size before: 1000
size before: 1000
size before: 315
size before: 1685
size before: 1000
size before: 1000
size before: 415
size before: 1585
size before: 1000
size before: 1000
size before: 415
size before: 1585
size before: 0
size after: 0
size after: 1000
size before: 1000
size before:
t; self: fix docs. :-)
>
> -Josh
>
> BTW, you can pipeline the stream commands, you can issue several at
> once, and then issue a new command every 1000 samples.
>
>
> On Sun, Aug 8, 2010 at 7:46 AM, Zohair wrote:
>>
>> Eric,
>>
>> Thanks fo
with different labels.
2- ports will have different vlen.
I tried the hide tag but it doesn't seem to be designed to work for ports.
Cheers,
Zohair
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Hello everyone,
On the the GNU scope sink, I have a signal peak of 0.3 counts, to how many
volts does this correspond? I have read that it corresponds to 1 full scale ADC
but wasn't successful in finding the latter.
Any help with this please?
Thanks.
Dear All,
I have built a block that uses single input sample to produce a single output
sample. The weird thing that general_work in gr_block returns a number around
4095, 4096. any interpretation or solution for this?
Thanks a lot.
Zohair
Hi Eric,
I have read what you recommended but still haven't understood what the
significance of this number is. I have another block that generates a vector
of 4 elements and the noutput_items is almost 1/4 the number of first block.
Any further help please?
Thanks again,
Zohair
&
Doug,
Thanks for sharing your solution. I will try it and see what happens.
Cheers,
Zoh
> Date: Mon, 21 Jun 2010 10:05:59 -0400
> Subject: Re: [Discuss-gnuradio] Synchronising USRP2's in GRC.
> From: doug.gei...@bioradiation.net
> To: zohair...@hotmail.com
> CC: Discuss
plot
the result using the MATLAB function plot()
Sometime also i also receive this error:
usrp2: mismatched command reply length (expected: 0 got: 215). op =
For both errors, I just re-run the graph again and it works well.
Any hint about those to errors, please?
Cheers,
Z
e/uhd/host/lib/usrp/usrp2/io_impl.cpp:97
Waiting for reply. By the way, thank you for modifying the online manual :)
Best regards,
Zohair
Date: Thu, 8 Jul 2010 10:13:52 -0700
From: j...@joshknows.com
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] UHD Announcement - July 6th 20
gards,
zohair
> Date: Fri, 9 Jul 2010 09:18:24 -0700
> From: j...@joshknows.com
> To: zohair...@hotmail.com
> CC: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] UHD Announcement - July 6th 2010
>
>
> > 3) set times next pps (synchronously)
> >
some help with these issues, I would be most grateful.
Best regards to all those who helped me thought my project and special thanks
to Eric and Josh.
Zohair
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Thanks Matt for the information.
Actually, I meant to ask a wider question about the difference between the
UHD branch and VRT branch. In other words, "what's new"
Regards,
Zohair
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Sent: Thursday,
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