Hello SKA15, well, I'm pretty sure there is some way to do this in GRC; but honestly, this sounds like something that would be very little lines of code in python; I recommend going through the guided tutorials [1] in order to understand how to write a python block that will emit the right stream tags at the right time.
Greetings, Marcus [1] http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials On 12/23/2014 04:40 AM, Thesis 2015 wrote: > Good Day, > > We are able to receive FM signals using the USRP1 with WBXv3 50-2200 > having a 750cm solid wire that serves as an antenna. We were wondering > how to modify the generated GRC python code. We are planning on > changing the center frequency automatically with an interval of 200MHz > in a specified time. Thank you. > > -SKA15- > > On Thu, Dec 18, 2014 at 12:19 AM, Gerry Creager - NOAA Affiliate > <[email protected] <mailto:[email protected]>> wrote: > > Considering the saturation level of most commercial FM stations, > using a simple whip antenna will prove more than adequate. While a > wide-range log-periodic antenna might prove useful as you get > farther into your research, especially for broadband signals > requiring a directional antenna, using simpler tools while > learning is usually beneficial. > > gerry > > On Wed, Dec 17, 2014 at 4:06 AM, Marcus Müller > <[email protected] <mailto:[email protected]>> wrote: > > I'm afraid you did not make a mistake -- the LP0410 [1] is > specified for usage between 400 and 1200 MHz. Whilst it will > still pick up some signal at frequencies below 400MHz, > operating it at a quarter of the lower cutoff freq. will lead > to very suboptimal results. > > If you know your frequency range as well as you do, I > recommend trying Ralph's proposed 1/2 wavelength monopole antenna. > > Greetings, > Marcus > > [1]http://www.ettus.com/product/details/LP0410 > > On 12/17/2014 09:43 AM, Thesis 2015 wrote: >> We're sorry. We made a mistake with the frequency range that >> the antenna could receive. It is actually 40MHz - 1.2GHz. >> >> -SKA15- >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] <mailto:[email protected]> >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] <mailto:[email protected]> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > -- > Gerry Creager > NSSL/CIMMS > 405.325.6371 <tel:405.325.6371> > ++++++++++++++++++++++ > “Big whorls have little whorls, > That feed on their velocity; > And little whorls have lesser whorls, > And so on to viscosity.” > Lewis Fry Richardson (1881-1953) > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] <mailto:[email protected]> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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