Posted: Wed Jan 05, 2011 5:44 am Post subject: problem using snap application for visualization of DDC O/P
There is problem with snap application , Its binviewer utility shows an output that ranges between 0 to Fs/2 (half of sampling frequency) when i introduce decimation of 40 then my output visible on binviewer snap application is multiplied by 40 (decimation factor) , so the output that should be 100KHz is shown as 40 *100 Khz = 4000 Khz and output that should be 200 Khz is represented as 40 *200 Khz = 8000 Khz which is wrong the output must be scaled as accordence with decimation factor,
for example when there is decimation of 8 then output is at sampling frequency Fs/8 for that filter
when cic has decimation of 2 and cfir has decimation of 20 then now sampling frequency is Fs/(2*20) = Fs/40 where as on the frequency scale it is still Fs/2 on snap application.
Please also guide me how i can use the output data that is displayed by scnap application in form of text file , as i require to plot that Text file data using Matlab.
Joined: 07 Mar 2006 Posts: 2252 Location: So. Cal. USA
Posted: Wed Jan 05, 2011 9:44 am Post subject:
The Binview application is capable of generating a text version of the binary data file currently being viewed. Select the Time tab and enable the Graph Options dialog. Click the Binary To Text button on the top of the dialog to create a new file with the same name as the binary data file, but with the .txt extension.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You cannot download files in this forum