Thank you for this approach as it is back to my original starting point using the VCO block.
Yet What I do not understand is; why the VCO is needed if you are controlling the center frequency of the Tx channel with a scaled sawtooth as a variable controlling center frequency. Vs, the output of a numerically controlled frequency source(VCO) that provides the center frequency already ramped by the sawtooth that controls center frequency input of the tx channel. Am I over thinking this? seems like I am also redundant in my description > On Apr 28, 2016, at 3:46 PM, Chris Kuethe <chris.kue...@gmail.com> wrote: > > You can do this with gnuradio-companion blocks. > > Use a signal source block to generate a sawtooth wave, feed it into an > VCO block and dump its output into a probe signal (maybe call it > "ramp_out"). Then use a function probe (maybe call it "tuner_freq") > block to monitor the value of the probe signal, and use that as the > the center frequency for your rf sinks... You might want to play > around with add const, multiply const, and throttle to generate new > tuning steps at an appropriate rate. > > On Thu, Apr 28, 2016 at 3:34 PM, Richard Bell <richard.be...@gmail.com> wrote: >> Do you specifically not want to use uhd_siggen_gui when you say you want to >> use companion? >> >> If you were not aware of uhd_siggen_gui, type that into a command line and >> test it out. It can generate a sweeping tone if that's all you need. >> >> Rich >> >> On Thu, Apr 28, 2016 at 3:16 PM, Dan McKenna <d...@astro.caltech.edu> wrote: >>> >>> Hi There, >>> >>> I am using a B210 to record band widths from 1 to 20 MHZ, center >>> frequencies from 400Mhz to 2 Ghz. >>> To test my post detection software I would like to use a Tx channel to >>> make a sweep generator as a real time test source >>> at sweep rates of around 50 Mhz/second over 1 to 20 mhz range with a >>> center frequency of 400 Mhz to 2Ghz. >>> >>> To be clear I wish to use companion to generate a frequency sweep at a >>> rate, defined by start/stop frequency and sweep time >>> or frequency, range, rate..... for example Freq 400 Mhz, range 2 mhz, rate >>> 50Mhz/second. >>> >>> Is this possible with the standard gnu radio companion block set? >>> >>> Thanks >>> >>> Dan >>> >>> >>> _______________________________________________ >>> Discuss-gnuradio mailing list >>> Discuss-gnuradio@gnu.org >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > > > > -- > GDB has a 'break' feature; why doesn't it have 'fix' too? _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
