yes indeed a sync pulse does help significantly.... doh.... On Wed, May 15, 2013 at 12:36 PM, Jack Hickish <[email protected]> wrote: > Hi Ross, > > Have you looked upstream at, eg, the FFT output, to check there is a single > spike coming out of that? Might also be worth making sure that you are > simulating a sync pulse, and waiting long enough for data after the sync to > propagate all the way through the design. > > Cheers, > Jack > > > On 15 May 2013 20:28, Ross Williamson <[email protected]> wrote: >> >> I'm trying to simulate tut3 by putting in a sine-wave at the input and >> looking at the output of the accumulators - the acc_length is 2 and >> FFT and pfb size is 12. Input parameters for the sine wave are: >> >> Sample based, Simulation Time >> >> Amplitude 0.1 >> Bias 0 >> Sample per period 100 >> number of offset samples 0 >> sample time 1/4 >> Interpret vector parameters as 1-D checked >> >> I only look in the region where the output valid flag is high - The >> problem is that I get a forest of lines out of both accumulators with >> no obvious spike where the signal should be. It doesn't look like >> there is clipping. I can post pictures of the scopes if needed but >> I'm just wondering if I'm missing something obvious? >> >> >> -- >> Ross Williamson >> Research Scientist - Sub-mm Group >> California Institute of Technology >> 626-395-2647 (office) >> 312-504-3051 (Cell) >> >
-- Ross Williamson Research Scientist - Sub-mm Group California Institute of Technology 626-395-2647 (office) 312-504-3051 (Cell)
