[Discuss-gnuradio] GRC models in yaml format: Problem with enum option_attributes

2019-09-25 Thread Ruben Undheim
Hi, While trying to convert gr-dab to gnuradio 3.8, I've stumbled upon some problems with the GRC models. I have option attributes like this: https://github.com/andrmuel/gr-dab/blob/9bbaadfc159e1d493c9d9e3e4f11ac16550a1fa4/grc/dab_ofdm_demod.block.yml#L14 Then "vlensize" is used here: https://

Re: [Discuss-gnuradio] How to know that the last sample has arrived

2017-04-24 Thread Ruben Undheim
me know if you see any potential problems with this approach. I have a made a pull request to the master branch with the implemented concatenation block. Cheers Ruben 2017-03-31 12:06 GMT+02:00 Ruben Undheim : > Hi, > > Is there a good way to find out from inside general_work

Re: [Discuss-gnuradio] How to know that the last sample has arrived

2017-04-21 Thread Ruben Undheim
> What about using tagged streams or just a tag on the last sample? Is > that an option? So I have been trying out this for a while now. I have created modified versions of "file_source", "vector_source" and "head" which all add an "end" stream tag to the last sample. It has turned out VERY useful

Re: [Discuss-gnuradio] How to know that the last sample has arrived

2017-03-31 Thread Ruben Undheim
Thank you both for answering. > I would totally agree with Marcus. Especially you first approach can't > work reliably. It appeared quite stable for file_source, but I got some problems today with one of my custom blocks which suddenly caused the following block to be called with ninput_items[0]

[Discuss-gnuradio] How to know that the last sample has arrived

2017-03-31 Thread Ruben Undheim
Hi, Is there a good way to find out from inside general_work that the last sample has arrived? (such as from vector_source_X or file_source) If I consume (ninput_items[0] - 1) samples every time general_work is called, I will eventually get general_work called with ninput_items[0] == 1. Would thi

Re: [Discuss-gnuradio] Digital Audio Broadcast (DAB), anybody running gr-dab?

2015-08-26 Thread Ruben Undheim
Hi Matthias, > I stumbled across two gnuradio-related projects [1] and [2]. [2] has last > change several years ago. [1] has last change 7 months ago and is written by > Andreas Müller (put in BCC) who also wrote a semester thesis [3] about DAB - > Software Receiver Implementation which is qui

[Discuss-gnuradio] Shifted samples from USRP1

2013-04-01 Thread Ruben Undheim
Hi, I'm using the USRP1 and the UHD driver together with gnuradio. Often, especially at high sample rates (8MHz), the spectrum observed in the fftsink becomes distorted after a while. It becomes almost mirrored. Typically it happens after a couple of "overruns". I have tried finding out the reason

Re: [Discuss-gnuradio] Noise floor falls ~5dB when TX is started

2011-05-05 Thread Ruben Undheim
Hello, thanks Yes, the noise-dip is frequency sensitive. I have not been able to fully characterize it because at some frequencies it's bad and at others it's quite good, and there is not really a understandable pattern. At VHF-frequencies, it's at least quite bad before I run the script. I tried

Re: [Discuss-gnuradio] Noise floor falls ~5dB when TX is started

2011-05-04 Thread Ruben Undheim
bad ad-hoc solution to a problem that I would like to understand. Ruben 2011/5/5 Ruben Undheim > Hey, thanks > > You are right. I'm using the WBX-board. I wrote it in the first post, but I > understand that > you didn't see it because of the mess with my split-up posting

Re: [Discuss-gnuradio] Noise floor falls ~5dB when TX is started

2011-05-04 Thread Ruben Undheim
Hey, thanks You are right. I'm using the WBX-board. I wrote it in the first post, but I understand that you didn't see it because of the mess with my split-up posting.;) Anyway, I am using a simple indoor antenna, and I get the same result with a 2m whip as a log-periodic antenna (which btw. does

Re: [Discuss-gnuradio] Noise floor falls ~5dB when TX is started

2011-05-04 Thread Ruben Undheim
ht be the cause of this strange behavior? What happens when the usrp sink is initialized that would cause the receive noise floor to fall? Regards, Ruben 2011/5/5 Ruben Undheim > I've discovered that after I turn on the USRP and start receiving there is > some noise which because

[Discuss-gnuradio] Noise floor falls ~5dB when TX is started

2011-05-04 Thread Ruben Undheim
I've discovered that after I turn on the USRP and start receiving there is some noise which because of some strange reason disappear when I start the transmitting part of the board. For frequencies around 150MHz with the WBX-board and USRP1, the noise floor is reduced by 5dB, and seriously improves

Re: [Discuss-gnuradio] WBX - only real signal after some time

2011-03-01 Thread Ruben Undheim
d hangs after a while.. However, when it's in slot B, everything's fine) Ruben 2011/1/20 Ruben Undheim > Thanks > > I am using the traditional driver. Maybe I can try to use another computer > or to put the board in the other slot, > and see if the problem remains th

Re: [Discuss-gnuradio] WBX - only real signal after some time

2011-01-20 Thread Ruben Undheim
Thanks I am using the traditional driver. Maybe I can try to use another computer or to put the board in the other slot, and see if the problem remains the same. Ruben 2011/1/20 Marcus D. Leech > On 01/20/2011 11:40 AM, Ruben Undheim wrote: > > Hello. > > > > I just wo

[Discuss-gnuradio] WBX - only real signal after some time

2011-01-20 Thread Ruben Undheim
Hello. I just wondered if anyone else has experienced that the WBX stops sending the quadrature component of the complex signal after a while. This happens especially if I have sliders for setting the frequencies or the gain, and the sliders are slided. (so that a frequency change control signal i

[Discuss-gnuradio] A little beginner-GUI

2007-06-06 Thread Ruben Undheim
I have put together a little beginner GUI, which can demodulate FM, AM and SSB from files and from the USRP by pointing at a FFT-display. Since I am quite new myself, I did this as a "beginner"-project. I just wondered if some other of you guys had made something similar, and could post your cod

RE: [Discuss-gnuradio] LED not blinking

2006-07-14 Thread Ruben Undheim
or will I have to return it for fix? Ruben From: "Ruben Undheim" <[EMAIL PROTECTED]> To: discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] LED not blinking Date: Fri, 07 Jul 2006 20:33:12 +0200 I have just received the USRP, connected the basicrx and basictx, installed a

[Discuss-gnuradio] LED not blinking

2006-07-07 Thread Ruben Undheim
I have just received the USRP, connected the basicrx and basictx, installed all the software, connected the USB 2.0 cable and connected power to it with the USRP power adapter. But when I read dmesg I only see these messages: [17179697.552000] usb 3-5: new high speed USB device using ehci_hcd a