Hi Wan Also remember that you have a PFB so (from the memo) you should remember to include the number of taps in your calculation.
e.g 2 order-2 reorder blocks, order-9 unscrambler, 4 input, 2048 channels, 2 tap PFB min sync = 2x(2x9x2048/4) = 9216x2 Good luck Andrew 2008/11/5 <[email protected]> > Hi Andrew: > > Thanks for your help. According the sync_memo: > > My example is: 2 order-2 reorder blocks, order-9 unscrambler, 4 input, 2048 > channels. > > minimum sync period = 2*9*2048/4 = 9216. > > And I set the counter to 9215. I guess the sync period is all right. > > Wan > > ------------------------------ > *From:* Andrew Martens [mailto:[email protected]] > *Sent:* Tuesday, 4 November 2008 6:07 PM > *To:* Cheng, Wan (ATNF, Marsfield) > *Cc:* [email protected] > *Subject:* Re: [casper] Casper library basic setup > > Hi Wan > > I had a look at your design and noticed the following; > > * The output of the FFT is complex data. You need to convert this into real > and imaginary parts if it is to make sense. Use a c_to_ri from the Misc > section of the library. > * You need to put "Gateway Out" blocks on all signals from Xilinx blocks > that go to 'normal' Simulink blocks. This means that all inputs to Scope > blocks from System Generator blocks need to go through a "Gateway Out" > block. > * Please also re-read the memo Henry suggested on the use of syncs in the > CASPER library. Your sync period is too small relative to the size of your > FFT and PFB. > * Also note that the output sync from the FFT will show you where your > spectrum begins so you may want to look at that with the scope you use to > look at the FFT data too. > > Hope this helps. > > Cheers > Andrew > > > 2008/11/4 <[email protected]> > >> Hi all: >> >> I build a very basic module with PFB and FFT. But the output looks not >> right. Anybody has anyidea? What's wrong with it? >> The attached is the mdl file. >> >> Thanks. >> >> Wan >> > >
