Re: [Discuss-gnuradio] RuntimeError: b200: 2 RX 1 TX and 1 RX 2 TX configurations not possible

Hi all, I think what Lefteris tries to implement is a 2x2 loopback with a USRP-B210. At least this is what I can see from the flowgraph attached in the first email. Is that possible with B210? Best, George On Mon, Nov 17, 2014 at 5:47 PM, Ben Hilburn wrote: > Hi Lefteris - > > We recently add

[Discuss-gnuradio] Rotating constellations and varying LOs with USRP B210 + Board Mounted GPSDO

Hi everyone, Has anyone noticed unstable LOs or carrier frequency offsets when using USRP B210s with board mounted GPSDOs? We have recently been doing field tests using GPS-disciplined oscillators for both USRP B210s and USRP N210 and occasionally both transmitter and receiver flowgraphs lose GPS

Re: [Discuss-gnuradio] Rotating constellations and varying LOs with USRP B210 + Board Mounted GPSDO

ther? > > On Wed, Aug 30, 2017 at 6:14 PM, George Sklivanitis < > george.sklivani...@gmail.com> wrote: > >> Hi everyone, >> >> Has anyone noticed unstable LOs or carrier frequency offsets when using >> USRP B210s with board mounted GPSDOs? >> >> W

[Discuss-gnuradio] Problem with undefined symbol in new block created by gr_modtool in 3.7.2

/wiki/OutOfTreeModulesConfig for correctly configuring it but the problem still holds. Any ideas? Thanks, -George -- Sklivanitis Georgios ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] Problem with FW and FPGA images

firewall of ubuntu but nothing changed. Are there any new images for UHD_003.004.001-27-g93d4a16f revision in the main branch that I am not aware of? Thanks, George -- Sklivanitis Georgios Postgraduate Student Telecommunications Division Technical University of Crete ECE Dept. Tel. : 28210 59257

Re: [Discuss-gnuradio] Problem with FW and FPGA images

sometimes there is a connection and after just typing uhd_find_devices the connection is lost. Any other ideas guys? Thanks again, George On Fri, Apr 13, 2012 at 2:00 AM, Josh Blum wrote: > > > On 04/12/2012 05:15 PM, George Sklivanitis wrote: > > Hello everyone, > > > >

[Discuss-gnuradio] Fwd: Problem with FW and FPGA images

-- Forwarded message -- From: George Sklivanitis Date: Fri, Apr 13, 2012 at 2:30 AM Subject: Re: [Discuss-gnuradio] Problem with FW and FPGA images To: Nick Foster Hi Nick, I am sorry but I have been misunderstood. Actually the same USRP2 that is not working and cannot manage

Re: [Discuss-gnuradio] Problem with FW and FPGA images

n Fri, Apr 13, 2012 at 2:32 AM, Josh Blum wrote: > > > On 04/12/2012 11:12 PM, George Sklivanitis wrote: > > Hi Josh, > > > > The sequence of the LEDs is D and F coming green just in the same way as > > the video apart from the B led where I cannot see why to come g

[Discuss-gnuradio] Tweaking digital_bert_tx and digital_bert_rx

Hello everyone, Lately, I have been trying to tweak the way both digital_bert_tx and digital_bert_rx are working by introducing in the transmitter side my own generated random .dat file instead of transmitting an infinite vector of ones (default) while at the receiver side I consider the transmitt

[Discuss-gnuradio] Dynamic parameter modification in a custom block

file_source -> custom_block2 -> file_sink (2) Would it be possible to use as the amplitude argument in (1) the output of the custom_block2 in (2). Thanks -George -- Sklivanitis Georgios Postgraduate Student Telecommunications Division Technical University of Crete ECE Dept. T

[Discuss-gnuradio] Fwd: Dynamic parameter modification in a custom block

Any ideas guys? -- Forwarded message -- From: George Sklivanitis Date: Mon, Jun 4, 2012 at 12:08 AM Subject: Dynamic parameter modification in a custom block To: discuss-gnuradio@gnu.org Hello all, I am dealing with the problem of finding a way to dynamically give values to a

Re: [Discuss-gnuradio] Dynamic parameter modification in a custom block

ustom_block2", tags might not work. Maybe there's a > branch for this sort of non-downstream async control? > > Hope this helps; good luck! - MLD > > On Jun 4, 2012, at 3:52 PM, George Sklivanitis wrote: > > I am dealing with the problem of finding a way to dynamical

[Discuss-gnuradio] SRRC pulse shaping question

p me with the above. Thanks, -George -- Sklivanitis Georgios PhD Student <>___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] SRRC pulse shaping question

alino wrote: Have you taken into account the group delay of the filter? How long is your filter? Try sending zeroes at the end to flush your filter state? Brian On Tue, Dec 4, 2012 at 11:35 PM, George Sklivanitis mailto:george.sklivani...@gmail.com>> wrote: Hello all, I have

Re: [Discuss-gnuradio] SRRC pulse shaping question

n set a flag and multiply the samples coming out by 1 or 0 depending if you are flushing or not? Brian On Wed, Dec 5, 2012 at 12:11 AM, George Sklivanitis mailto:george.sklivani...@gmail.com>> wrote: The filter is consisted of 55 taps. I tried by sending zeros. Thoug

[Discuss-gnuradio] Custom block one input/output variable number of output/inputs

rts again. Overall the number of output samples are the expected ones but why the counter over the item restarts at some time instants? Thanks, -George -- Sklivanitis Georgios Postgraduate Student ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.

[Discuss-gnuradio] Fwd: Custom block one input/output variable number of output/inputs

restarts again. Overall the number of output samples is the expected ones but why the counter over the noutput_items restarts at some time instants? Thanks, -George -- Sklivanitis Georgios Postgraduate Student -- Sklivanitis Georgios Postgraduat

[Discuss-gnuradio] Gr_Extras Packet_Framer problem

suggestions on how to resolve this. I also saw Josh's proposal in Guy's similar problem but didn't work for me. Thanks, -George -- Sklivanitis Georgios Postgraduate Student ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] Gr_Extras Packet_Framer problem

Hi Josh, Thanks for the quick response. I am in the latest commit since, I made the clone yesterday. -George On Mon, Feb 4, 2013 at 6:01 PM, Josh Blum wrote: > > > On 02/04/2013 03:54 PM, George Sklivanitis wrote: > > Hello all, > > > > I have just installed the E

Re: [Discuss-gnuradio] Gr_Extras Packet_Framer problem

Hi Josh, in case you also needed my gnuradio version, it's 3.6.2 in Ubuntu 12.04. Thanks again, -George On Mon, Feb 4, 2013 at 6:20 PM, George Sklivanitis < george.sklivani...@gmail.com> wrote: > Hi Josh, > > Thanks for the quick response. > I am in the latest commit

[Discuss-gnuradio] Pre-cog repo is down?

Hello guys, Is https://github.com/buoyboy/pre-cog down or I am the only one not being able to have access? -George -- Sklivanitis Georgios Postgraduate Student ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman

Re: [Discuss-gnuradio] Pre-cog repo is down?

wrote: https://github.com/jmalsbury/pre-cog <https://github.com/buoyboy/pre-cog> On Mon, Feb 4, 2013 at 7:41 PM, George Sklivanitis mailto:george.sklivani...@gmail.com>> wrote: Hello guys, Is https://github.com/buoyboy/pre-cog down or I am the only

Re: [Discuss-gnuradio] Pre-cog repo is down?

ver: (USRP_source -> packet_deframer -> GMSK_demod -> blob_to_s) On 2/4/13 10:42 PM, John Malsbury wrote: https://github.com/jmalsbury/pre-cog <https://github.com/buoyboy/pre-cog> On Mon, Feb 4, 2013 at 7:41 PM, George Sklivanitis < george.sklivani...@gmail.com> wrote: >

Re: [Discuss-gnuradio] Pre-cog repo is down?

ot after. Is this > actually how it is connected or is there just a typo? > > Send me the GRC file. > > > > On Mon, Feb 4, 2013 at 7:54 PM, George Sklivanitis < > george.sklivani...@gmail.com> wrote: > >> Hi John, >> >> I suspected that this was wher

Re: [Discuss-gnuradio] Pre-cog repo is down?

Malsbury >> wrote: >> >>> ... GMSK_mod -> packet_framer -> multiplier -> Burst-Tag ... >>> >>> the packet_framer should come before the modulator. Not after. Is this >>> actually how it is connected or is there just a typo? >>> &

Re: [Discuss-gnuradio] Pre-cog repo is down?

with that has working > mod and demod setup with a 'heartbeat' block that generates a periodic > message. > > -John > > > > > On Mon, Feb 4, 2013 at 8:28 PM, George Sklivanitis < > george.sklivani...@gmail.com> wrote: > >> I am in v3.6.2.-3 and the

[Discuss-gnuradio] USRP-FIFO, question about double buffering

Hello all, Lately, I am experimenting with an implementation of a point-to-point On-off Keying communication system. I mostly prefer to use the USRP as the receiver, in which I can capture samples and later process them through Matlab. However, because of the algorithms I try to apply at the

Re: [Discuss-gnuradio] [USRP-users] Measuring Input SNR in USRP using On-Off Keying modulation

On 7/6/11 8:20 PM, Colby Boyer wrote: One method would be to use a single pole IIR filter to get an average of the noise floor energy, and compare that with the average symbol energy. On Wed, Jul 6, 2011 at 6:49 AM, George Sklivanitis mailto:george.sklivani...@gmail.com>> wrote: