my question was why the flex-radio system is offset from the lo by 11Khz. if there is clock jitter in the sampling system that same jitter would also be present at the offset.
________________________________ From: Guido <[email protected]> To: [email protected] Sent: Thu, October 22, 2009 11:46:34 AM Subject: Re: [soft_radio] Quadrature Sampling Detector Questions On Thu, Oct 22, 2009 at 7:34 PM, Alberto I2PHD <[email protected]> wrote: >ad7zu wrote: >Although I would not expect phase noise to be a factor since >>the bus switch does not turn on until the enable signal is above 1v. >> Phase noise translates into timing jitter, so you cannot have hopes to >> avoid it >by simply thresholding the amplitudes.... Wonder if thresholding a sine wave is increasing the phase noise. When thresholded the period jitter is soley based on a single instance of the amplitude transition, while phase errors during for the full sine period could average out period jitter. Or is this not the case? 73, Guido PE1NNZ
