Hi all, I want to change usrp clock to 52M,
there are some document about change usrp clock in gnuradio 3.1 and 3.2 but
none for 3.3.
how to change usrp clock to 52M in gnuradio 3.3 ?
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On 08/12/2010 04:47 PM, Elvis Dowson wrote:
Hi Eric,
I came across an old thread,
http://www.ruby-forum.com/topic/107228
"There is a general issue related to the fact that when using
usrp_wfm_rcv and similar applications that there are in fact two clock
domains, and that they ar
Hi Eric,
I came across an old thread,
http://www.ruby-forum.com/topic/107228
"There is a general issue related to the fact that when using
usrp_wfm_rcv and similar applications that there are in fact two clock
domains, and that they are guaranteed not to match. There's an osc on
t
Hi,
Another data point, if I set the audio sink sample rate to 16kHz, there
are no under-runs, but that obviously will cause the sound to play back at a
lower pitch, but atleast there are no crackles and distortions. In the console
output window, there are no audio underruns.
When you se
Hi,
I was reading up on audio underruns, and basically its because the
application isn't being able to generate enough data for the sound-card, i.e.
GNU Radio generating data slower than the card is consuming the data.
Ubuntu Studio Upgrade from Ubuntu - Community Ubuntu Documentation
On Thu, 2010-08-12 at 23:25 +0200, Sylvain Munaut wrote:
> Unfortunately :
>
> Error (10663): Verilog HDL Port Connection error at
> rx_buffer_inband.v(273): output or inout port "num_packets" must be
> connected to a structural net expression
>
> And altough I'm fluent in VHDL, I have no idea a
Hi,
>> In which git is that code ? And more importantly, why isn't it in the
>> main repo :)
>
> It was in the old svn repo. It seems to have been migrated to git:
>
> http://gnuradio.org/cgit/ets.git/tree/usrp/fpga/inband_lib?h=inband
Cool !
Unfortunately :
Error (10663): Verilog HDL Port C
On Thu, Aug 12, 2010 at 09:51:31AM -0600, Eric Schneider wrote:
> On Thu, 2010-08-12 at 17:14 +0200, Sylvain Munaut wrote:
>
> > Mmm, in the code I've read, the tx timestamp counter was different than
> > the rx timestamp counter and with different reset signals.
>
> This is all from memory...
>
On Thu, Aug 12, 2010 at 09:29:35PM +0400, Elvis Dowson wrote:
> Hi,
> Would anyone happen to have an idea where I should start looking,
> in order to debug the audio under-runs for the audio sink?
Does the dial_tone.py example sound OK?
Eric
> Best regards,
> Elvis Dowson
___
On Thu, Aug 12, 2010 at 1:56 PM, naveen nischal
wrote:
>
> > Hi All,
> >
> > We have been using the USRP1 with the WBX card on it to communicate with
> > the AO-51 satellite. We are expecting to hear from the satellite using
> > an Fm Receiver GRC at 435.300 MHz but don't receive anything as yet,
I've run a comparison test of
- the "old" GR dqpsk block
- the "new" one (dqpsk2)
- the "op25" cqpsk (Gardner/Costas) block
The resulting constellation diagrams are viewable at
http://www.lightlink.com/mhp/qpsk2/
The results are: Gardner is the winner, the old GR blocks take second, the new
Hi,
Would anyone happen to have an idea where I should start looking, in
order to debug the audio under-runs for the audio sink?
Best regards,
Elvis Dowson
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On 08/12/2010 06:22 AM, Cheaw Wen Guey wrote:
Hi all,
As per the advice given, I have started to try change the FPGA code to
bypass the DDC for the USRP2.
I am first trying to edit using the 30day trial for ISE v12 in Windows.
I have 2 questions,
1. I fail to locate the project file from th
Hi Alex,
On Aug 12, 2010, at 1:03 PM, Alexandru Csete wrote:
> Try to resample the audio to 44.1 kHz or 48 kHz using a
> rational_resampler block. That might solve it.
Adding the Rational Resampler, with decimation = 2 and interpolation = 3, works
in terms of resampling. The two separate wave f
On Thu, 2010-08-12 at 17:14 +0200, Sylvain Munaut wrote:
> Mmm, in the code I've read, the tx timestamp counter was different than
> the rx timestamp counter and with different reset signals.
This is all from memory...
There were two clocks, but the resets should have been tied together.
If the
Hi all,
As per the advice given, I have started to try change the FPGA code to
bypass the DDC for the USRP2.
I am first trying to edit using the 30day trial for ISE v12 in Windows.
I have 2 questions,
1. I fail to locate the project file from the git.
2. I was wondering if the AeMB processor d
Correction: As Brian stated, I think 0x is the correct "NOW"
timestamp.
On Thu, 2010-08-12 at 09:08 -0600, Eric Schneider wrote:
> Sylvain -
>
> On Thu, 2010-08-12 at 14:27 +0200, Sylvain Munaut wrote:
>
> > - How can I know the 'current' TX timestamp ? I want to send a ping
> > command
Hi Eric,
>> - How can I know the 'current' TX timestamp ? I want to send a ping
>> command, but I don't see a way to know what timestamp I should use.
>
> It is in the header of every Rx packet. If you need to send a command
> without knowing the current timestamp, use timestamp = 0, which wil
Sylvain -
On Thu, 2010-08-12 at 14:27 +0200, Sylvain Munaut wrote:
> - How can I know the 'current' TX timestamp ? I want to send a ping
> command, but I don't see a way to know what timestamp I should use.
It is in the header of every Rx packet. If you need to send a command
without knowing t
On Thu, Aug 12, 2010 at 8:27 AM, Sylvain Munaut wrote:
> Hi,
>
> I'm trying to adapt openbts to the inband firmware for which the source
> are available. (it seems the sources for the std_inband.rbf that openbts
> uses has been 'lost')
>
> Two things I'm faced with
>
> - How can I know the 'curre
Hi,
I'm trying to adapt openbts to the inband firmware for which the source
are available. (it seems the sources for the std_inband.rbf that openbts
uses has been 'lost')
Two things I'm faced with
- How can I know the 'current' TX timestamp ? I want to send a ping
command, but I don't see a way
Hello,
I'm working now with peak_detector block and find out that some functions
don't really work.
I've used the following 2 blocks:
- Peak Detector (gr_peak_detector): the parameter "look ahead" seems have no
function. I gave "look ahead" many values but the peak value did not change.
I've se
Hi every body,Now i've got a problem that my usrp now has only BasicRX and WBX
but i want to make a experiment that i want to generate the signal from the
signal generator for 1.5M and 4M through each Daughter board
and i decide to generate the 1.5M to basicRx and i knew that minimum Rage of
W
Thanks a lot Jason, Marcus and Moeller for your support and guidance. My
USRP2 with the DBSRX daughter board is up and running :-)
Cheers,
Amee
Moeller wrote:
>
> On 12.08.2010 00:10, Jason Abele wrote:
>> Testing the id number of your DBSRX on USRP2:
> Thanks Jason, your diagnosis instructi
On 12 August 2010 09:24, Elvis Dowson wrote:
> Hi,
> I have switched my linux environment from Fedora 12 to Ubuntu 10.04.
> This gives me better network performance with the USRP2, even when running
> Ubuntu 10.04 inside a VMware environment on Mac OS X 10.4.
> However, real-time audio, e.g
>
>- What is the maximum voltage can I feed the daughter-board through SMA
> ?
>
Roughly 0dBm would be a safe bet.
Which translates to roughly 0.22V
There are several handy places on the web for doing conversions between
dBm and voltage:
http://www.raltron.com/cust/tools/voltage_to_dbm.
Hi,
I have switched my linux environment from Fedora 12 to Ubuntu 10.04.
This gives me better network performance with the USRP2, even when running
Ubuntu 10.04 inside a VMware environment on Mac OS X 10.4.
However, real-time audio, e.g. an FM receiver application, when played back in
r
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