On Fri, Sep 3, 2010 at 5:07 PM, Suleja, Lukasz <lukasz.sul...@roke.co.uk> wrote: > I am using the following code snippet to view a 100kHz sinewave on a virtual > oscilloscope: > > self.interface_rate = 1e9 > self.src = gr.sig_source_c(self.interface_rate, gr.GR_SIN_WAVE, 1e3, 1) > self.scope = scopesink2.scope_sink_c(panel, sample_rate=self.interface_rate) > self.connect(self.src, self.scope) > > As I increase the frequency of the sine wave to 100kHz, the resolution of > the plotted points deteriorates. > > With a sampling rate of 1MHz and a sine wave frequency of 100kHz, I would > expect the time interval between plotted point to always be 1us. However, if > I reduce the time-base and select the marker to be "Dot Larg" I can clearly > see that the time-period is not the expected 1us. > > Please could some one shed some light on why there appears to be a > discrepancy; or are my expectation just incorrect.
You use sample rate 1e9 = 1 Gsps - I think that's slightly above what is possible on standard PC. Maybe that's just a typo? Alex _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
