Re: [Discuss-gnuradio] Move USRP LO with USRP sink block?

2015-02-10 Thread Marcus Müller
Well, you nearly already are doing this! just use "uhd.tune_request(...,...)" where you'd set the TX frequency normally in the USRP sink's properties dialog. Greetings, Marcus M. On 02/10/2015 08:06 PM, Jon West wrote: > Thanks, I need to be able to do this with the block in Gnu Radio > Companion

Re: [Discuss-gnuradio] Move USRP LO with USRP sink block?

2015-02-10 Thread Jon West
Thanks, I need to be able to do this with the block in Gnu Radio Companion, from the GUI, is that possible? On Tue, Feb 10, 2015 at 1:59 PM, Marcus Müller wrote: > Hi Jon, > > that documentation can be found in the UHD manual [1] and specifically in > the tune_request_t doxygen [2]. > > Greetin

Re: [Discuss-gnuradio] Move USRP LO with USRP sink block?

2015-02-10 Thread Jon West
Right, where is this functionality in the USRP_SINK in GNURadio companion? Or do I need to create some kind of python wrapper? On Tue, Feb 10, 2015 at 1:58 PM, wrote: > There's a uhd.tune_request() function mapped into Python land, so you > can use the result of that as the "freq" parameter in

Re: [Discuss-gnuradio] Move USRP LO with USRP sink block?

2015-02-10 Thread Marcus Müller
Hi Jon, that documentation can be found in the UHD manual [1] and specifically in the tune_request_t doxygen [2]. Greetings, Marcus M. [1] http://files.ettus.com/manual/page_general.html#general_tuning_rxchain [2] http://files.ettus.com/manual/structuhd_1_1tune__request__t.html#af9d2c5fb89c10024

Re: [Discuss-gnuradio] Move USRP LO with USRP sink block?

2015-02-10 Thread mleech
There's a uhd.tune_request() function mapped into Python land, so you can use the result of that as the "freq" parameter in a UHD sink block. On 2015-02-10 13:55, Jon West wrote: > When I transmit a signal at a certain frequency there is a large spike at > what I have set the center frequen

Re: [Discuss-gnuradio] Move USRP LO with USRP sink block?

2015-02-10 Thread Jon West
When I transmit a signal at a certain frequency there is a large spike at what I have set the center frequency of the USRP. My signal does not have this large spike, because it is the LO of the USRP. We take care of this in things we write ourselves, but I can't find the documentation to do it for

Re: [Discuss-gnuradio] Amplitude settings in uhd_siggen

2015-02-10 Thread Martin Braun
On 02/10/2015 10:15 AM, zealdeal wrote: > In uhd_siggen_gui tool, u cant set signal amplitude more than 1. Is there any > reason behind this? > > I commented out the code where the limit checking is done. Then, when I > increase the amplitude of the transmitted signal beyond 1, I dont see any > ch

Re: [Discuss-gnuradio] Precise interrupts in GNURADIO?

2015-02-10 Thread Martin Braun
Precise timings like this are difficult to do with GNU Radio, which is optimized for maximum throughput. However, I think you can do things easier than you're doing. First of all, you can stop the flowgraph from within blocks by returning WORK_DONE from your work function. You can also return WORK

[Discuss-gnuradio] Amplitude settings in uhd_siggen

2015-02-10 Thread zealdeal
In uhd_siggen_gui tool, u cant set signal amplitude more than 1. Is there any reason behind this? I commented out the code where the limit checking is done. Then, when I increase the amplitude of the transmitted signal beyond 1, I dont see any change in amplitude of the recieved signal. What is th