A bit late here, but the X300 can now (at least on master) also do all the
other clock rates in between 184.32 and 200 Msps.
On Tue, Aug 6, 2019 at 11:56 AM Derek Kozel wrote:
> Hi Paul,
>
> What rate do you want to adjust it to and for what purpose? The X300
> supports a master clock rate of
g Technician IV
>> paul.mitch...@testllc.com
>> 256.716.9056 (Work)
>> 256.289.3581 (Cell)
>>
>> From: Marcus Müller
>> Sent: Wednesday, August 7, 2019 9:27 AM
>> To: Mitchell, Paul; Derek Kozel; discuss-gnuradio@gnu.org
>> Cc: usrp-users
>> Sub
mitch...@testllc.com
> 256.716.9056 (Work)
> 256.289.3581 (Cell)
>
> From: Marcus Müller
> Sent: Wednesday, August 7, 2019 9:27 AM
> To: Mitchell, Paul; Derek Kozel; discuss-gnuradio@gnu.org
> Cc: usrp-users
> Subject: Re: [Discuss-gnuradio] Clock rate change on x300
>
> D
.@testllc.com
> 256.716.9056 (Work)
> 256.289.3581 (Cell)
>
> From: Derek Kozel
> Sent: Tuesday, August 6, 2019 1:56 PM
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] Clock rate change on x300
>
> Hi Paul,
>
> What rate do you want to adjust it to and f
ll)
>
> From: Derek Kozel
> Sent: Tuesday, August 6, 2019 1:56 PM
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] Clock rate change on x300
>
> Hi Paul,
>
> What rate do you want to adjust it to and for what purpose? The X300
> supports a master
...@testllc.com<mailto:paul.mitch...@testllc.com>
256.716.9056 (Work)
256.289.3581 (Cell)
From: Derek Kozel<mailto:de...@bitstovolts.com>
Sent: Tuesday, August 6, 2019 1:56 PM
To: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org>
Subject: Re: [Discuss-gnuradio] Clock r
Hi Paul,
What rate do you want to adjust it to and for what purpose? The X300
supports a master clock rate of 200 MS/s and 184.32 MS/s. The built in
DSP can convert to an integer divisor sample rate of one of those two.
Adding support for another rate would require either a lot of software
work
I need to adjust the clock rate on a USRP x300. Is there a simple way to do
this or do I need to use Vivado to access the FPGA image somehow? I am using
Linux for everything.
Paul Mitchell
Engineering Technician IV
paul.mitch...@testllc.com
256.716.9056 (Work)
256.289.3581 (Cell)
Hi George,
isn't the job of a clock recovery actually to *change* the phase of your
signal so that its original clocking is recovered?
I'm a bit confused; could you maybe elaborate on what you want to do
(what for/why/what specific output are you looking for)? Are you maybe
looking for the clock
Hi Phil:
> Date: Thu, 15 Jun 2017 12:57:54 +
> From: Phil Frost:
> I am working on a receiver for the amateur radio mode PSK31[1]. It's BPSK
> where the pulses are a raised cosine (impulse, not frequency domain) twice
> the symbol duration[2], no error correction, at 31.25 baud. The
I had messed with psk31 a while back. There's a gnuradio module to decode
and some example GRC's to send and receive that I had used here:
https://github.com/tkuester/gr-psk31 that may help you out. The flowgraphs
in the examples directory already have all the blocks set up to receive.
On
Do you mean the equalization would be performed with another linear filter?
matched filter -> equalizing filter -> clock recovery -> [...]
Wouldn't that be equivalent of convolving the input responses of the two
cascaded FIRs, with the net result being an unmatched filter?
Existing
Hi,
Nice problem you got there. In any case, have you considered performing
matched filtering (thus maximizing SNR), outputting more than one sample
per symbol (in fact, without decimation at all), then equalize (so that the
signal looks as if it was sent and received with a squared-root Nyquist
I am working on a receiver for the amateur radio mode PSK31[1]. It's BPSK
where the pulses are a raised cosine (impulse, not frequency domain) twice
the symbol duration[2], no error correction, at 31.25 baud. The transmitted
signal has no ISI, but after matched filtering it does:
[image:
Hi,
I'm not sure if I understood correctly your question, but clock recovery
(such as MM or Polyphase clock sync) takes the incoming signal and by
default outputs a sample every $T_s$ seconds (symbol time) but at the point
where the eye is widest (and thus it interpolates as needed). Once it
Hi all,
I need to perform clock recovery on a signal without constantly changing
its phase. I think that the clock recovery block in Gnuradio does exactly
that in order to maximize the energy of the signal. Is there any other way
that does not tamper with the signal phase?
Thanks!
Hi Tom,
why do/I/ have to advertise the PFB approach? Arguing against Mueller
Müller feels strange. Anyway:
Mueller Müller in the classical, real valued approach [1, eq (49), p.
524] in its core is
eqn. (49) page 524
with $z_k$ being the timing estimate ,$x_k$ being the input samples, and
Hi Klauss,
is it new ?
Not really, no. It's been around since ca April 2012.
If there's no Polyphase Clock Sync:
What version of GNU Radio are you using?
Best regards,
Marcus
PS: I always recommend not using ruby-forum but directly signing up to
the mailing list:
Wow ! Thank you all for your reply. Very interesting !
Tom, I didn't find the pfb_clock_recovery block in my GNU Radio
Companion, is it new ?
Best regards.
--
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Hi Marcus,
A it's the Polyphase Clock Sync, I didn't think about it ... :-D
Thank you for the advice, I will use the mailing list next time.
Best regards.
Klauss.
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From Matlab MM documentation [1]:
[...] Typically, the input signal is the output of a receive filter that
is matched to the transmitting pulse shape. [...]
Assuming the MM Gnuradio implementation has the same hypothesis on the
input signal (anybody can confirm this?), I deduced this block is
On Thu, Jul 30, 2015 at 3:03 PM, Iluta V iluta2...@gmail.com wrote:
Hi, Tom,
Could you be more specific where exactly it is not the right algorithm?
We'd appreciate that and would correct that in own work as well, if
Security Research Assessment made a mistake here.
I will be looking
Klaus,
the manual page for this block has a paper reference in it:
http://gnuradio.org/doc/doxygen/classgr_1_1digital_1_1clock__recovery__mm__ff.html#details
M
On 30.07.2015 10:16, Klauss Wolfeinstein wrote:
Hello,
I would like to find a proper documentation on MM algorithm block (paper
Hi Klauss,
You could also take a look at
https://www.tablix.org/~avian/blog/archives/2015/03/notes_on_m_m_clock_recovery/,
it helped me quite a bit!
Best regards...
Daniel
On Thu, Jul 30, 2015 at 7:17 PM, Martin Braun martin.br...@ettus.com
wrote:
Klaus,
the manual page for this block
Another point to keep in mind is that the MM block isn't great in fading
environments. It's really suboptimal in general. Look at the
pfb_clock_recovery block, instead.
Tom
On Thu, Jul 30, 2015 at 2:18 PM, Daniel Camara danielcam...@gmail.com
wrote:
Hi Klauss,
You could also take a look at
Hello,
I would like to find a proper documentation on MM algorithm block (paper
for example). Any ideas ?
Thank you.
Regards.
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Thanks for your explanation! That's worth while looking into!
On Fri, Jul 31, 2015 at 1:17 AM, Francisco Albani
francisco.alb...@gmail.com wrote:
From Matlab MM documentation [1]:
[...] Typically, the input signal is the output of a receive filter that
is matched to the transmitting pulse
On Thu, Jul 30, 2015 at 2:38 PM, Iluta V iluta2...@gmail.com wrote:
Research paper CONVERTING RADIO SIGNALS TO DATA PACKETS (Examination of
Using GNU Radio Companion for Security Research and Assessment) deals with
Clock Recovery MM, I attached the paper, have a look at:
6.Section 6.Counting
Hi, Tom,
Could you be more specific where exactly it is not the right algorithm?
We'd appreciate that and would correct that in own work as well, if
Security Research Assessment made a mistake here.
I will be looking forward to your response,
Iluta
On Thu, Jul 30, 2015 at 9:55 PM, Tom Rondeau
On Mon, Sep 8, 2014 at 5:49 PM, Bastian Bloessl bloe...@ccs-labs.org
wrote:
Hi all,
looking at the clock recovery MM code, I wonder if d_omega_relative_limit
is a relative or absolute deviation from d_omega.
Here it looks like absolute
On 09 Sep 2014, at 15:42, Tom Rondeau t...@trondeau.com wrote:
On Mon, Sep 8, 2014 at 5:49 PM, Bastian Bloessl bloe...@ccs-labs.org wrote:
Hi all,
looking at the clock recovery MM code, I wonder if d_omega_relative_limit is
a relative or absolute deviation from d_omega.
Here it looks
Hi all,
looking at the clock recovery MM code, I wonder if d_omega_relative_limit is a
relative or absolute deviation from d_omega.
Here it looks like absolute
https://github.com/gnuradio/gnuradio/blob/next/gr-digital/lib/clock_recovery_mm_ff_impl.cc#L107
Here it is relative
On 08/29/2014 12:02 AM, Sharath Ananth wrote:
Hello all,
I am using the B210 without an external 10MHz clock and without a GPSDO
mounted. As expected I see a frequency and sampling time error on the
captured samples. Once this sampling time error is estimated, I would
like to remove this
Hello all,
I am using the B210 without an external 10MHz clock and without a GPSDO
mounted. As expected I see a frequency and sampling time error on the captured
samples. Once this sampling time error is estimated, I would like to remove
this in hardware by changing the sampling clock by a
Hello,
I have this flowgraph in GNURadio:
http://i1281.photobucket.com/albums/a515/Carlos_Alberto_Ruiz_Naranjo/esque_zpsd89166da.png
- Green: calculates the signal delay of a satellite.
- Yellow: a clock with a second precision.
If I run the clock separately I can see in the WX GUI Number
Hi!
You shouldn't use so many throttles in one flow graph; throttle limits
the number of samples going through in a given time, and as soon as the
upstream blocks have filled their output buffer, they will be limited
in throughput, too.
So I guess this is the effect of throttles blocking each
Hi!
RetardoSat:
1.Come three samples (method work)
- X: X position of receiver.
- Y: Y position of receiver.
- Z: Z position of receiver.
- ClK: seconds.
2. With Kepler paremeters calculates the satellite position, the
distance between the
Hi,
I am checking the HRPT receiver available in gr-noaa repository and I don't
understand the parameters of the Clock Recovery block with the information
available about the HRPT format. I roughly know how that block works,
but Ineedmore information.
Thank you in advance.
Pablo Fernandez.
On Mon, Apr 7, 2014 at 9:41 AM, Pablo Fernández Alonso
pfernandezalons...@gmail.com wrote:
Hi,
I am checking the HRPT receiver available in gr-noaa repository and I don't
understand the parameters of the Clock Recovery block with the
information available about the HRPT format. I roughly
how can we set the time of usrp by sending it message. I know there are
function to (usrp.set_time_now()) do this from from top block variable but
can this be done by sending message at usrp port .
We can give internal reference signal of 10MHz but is there also a way to
give pps signal
The GPSDO can provide an internal 10 MHz/1 PPS signal. I'm not sure if
that's what you meant or not:
https://www.ettus.com/product/details/GPSDO-KIT
AFIAK, you cannot set the time of a USRP with a message. You may be able to
use the XML_RPC block in gr-extras to call the function if it is
thanks for the clarification
so i checked the new grextras wiki it has uhd_control block i guess that
can be used for this job.
Jay Prakash
Senior Undergraduate
Electronics Engineering
IIT (BHU)
VARANASI
+91-9559475258
http://about.me/jay.prakash/
so i checked the new grextras wiki it has uhd_control block i guess that
can be used for this job.
uhd_control block supports only a subset of usrp-functions (exposed
through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT
currently it doesn't support set_time_now()
so do we have any other block to do that. I did'nt find XML_RPC block in
the new gr-extras
Jay Prakash
Senior Undergraduate
Electronics Engineering
IIT (BHU)
VARANASI
+91-9559475258
http://about.me/jay.prakash/
http://www.linkedin.com/profile/view?id=91120191trk=hb_tab_pro_top
On Sun, Jun
XML_RPC block in the new gr-extras
XML_RPC would have been subject to the same limitations. It could only
call set_time_next_pps if set_time_next_pps was in the uhd_sink/source
blocks. Maybe you can update them to include the function.
Let me ask a more fundamental questions - why do you want
I think i can use set_command_time (which i guess set the next time of
transmission/command?).
how can i make the usrp send its time when configured for synchronization?
Jay Prakash
Senior Undergraduate
Electronics Engineering
IIT (BHU)
VARANASI
+91-9559475258
http://about.me/jay.prakash/
how can i make the usrp send its time when configured for synchronization?
I might be misunderstanding the question, but here's an answer. The USRP
source outputs stream tags on the first sample when streaming. The three
tags are 1) rx_time 2) rx_rate 3) frequency. Using (1) and (2), you
I went through the stream tagging pdf.
The tags from source has time,freq and rate.
I am interested in insuring that transmitter sets a particular frequency of
transmission ie Tx_Next_freq and time at which the transmitter starts
sending data packets at an instance.
The set_command_time as you
On 06/16/2013 02:13 PM, Adeel Anwar wrote:
so i checked the new grextras wiki it has uhd_control block i guess that
can be used for this job.
uhd_control block supports only a subset of usrp-functions (exposed
through gr-uhd) e.g. set_command_time, set/get_gain/freq etc BUT
currently it
On 06/16/2013 10:44 PM, Josh Blum wrote:
On 06/16/2013 02:13 PM, Adeel Anwar wrote:
so i checked the new grextras wiki it has uhd_control block i guess that
can be used for this job.
uhd_control block supports only a subset of usrp-functions (exposed
through gr-uhd) e.g.
Josh,
I didnt add every possible setting. But I am happy to add more on
request! I'm gathering that someone would like to make a configuration
and control block that could perform the synchronization tasks w/ a
GPSDO or some external clock and time source.
I think it will also be very useful to
Hi,
I've been trying to get two USRP2's with their clocks both synced to a 10MHz
reference (for now the same reference from the back of some test equipment)
- to do this I'm using the following code:
in_pipe1=usrp2.source_32fc('eth0')
in_pipe2=usrp2.source_32fc('eth2')
Tim Pearce wrote:
Hi,
I've been trying to get two USRP2's with their clocks both synced to a
10MHz reference (for now the same reference from the back of some test
equipment) - to do this I'm using the following code:
in_pipe1=usrp2.source_32fc('eth0')
On Tue, Oct 20, 2009 at 12:20 PM, Tim Pearce timothy.pea...@gmail.com wrote:
I'm also trying to attach the timestamp data do each sample -- as far as I
can tell this is sent to give the sample timestamp for the first sample in
each ethernet frame (then incremented by 1 for each subsequent
There is no frequency which can be received by both the BasicRX and the
DBSRX. What frequency are you putting in? What frequency are you telling
the USRP2s to tune to?
Matt
Hi,
Sorry I probably confused things by mentioning the BasicRX
DBSRX is the only receiver we have 2 of at the
Tim Pearce wrote:
There is no frequency which can be received by both the BasicRX and
the DBSRX. What frequency are you putting in? What frequency are
you telling the USRP2s to tune to?
Matt
Hi,
Sorry I probably confused things by mentioning the BasicRX
DBSRX is the
Ah! The 10MHz was coming out the back of the siggen so would have been
locked to the same reference.
Thanks for your help Doug/Matt -- next time I'll stop and think through my
test setup!
Cheers,
Tim
On Tue, Oct 20, 2009 at 6:16 PM, Matt Ettus m...@ettus.com wrote:
Tim Pearce wrote:
Hi,
What is the voltage level for the USRP external clock? Is 1V peak to
peak ok? I am planning to drive the board using a high accuracy
reference clock.
juha
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Hello:
Does anyone know the clock speed of master_clk, serial_clk and tx_clk?
Which one is fastest and which one is slowest?
Leo
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Hi, I'm an Italian student and I'm searching for documents concerning Mueller
Muller clock recovery method used from gnuradio.
Thanks a lot
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