Hi Raul
As Dan mentioned, planahead shouldn't make a difference to things like
dynamic range. If you're using an ADC that interleaves several cores (eg
5GSPS ADC), this could be something to do with poor ADC calibration. I'd
suggest looking into that as a possible cause?
Regards
Danny
Raul Sapunar Opazo <mailto:[email protected]>
September 16, 2014 at 10:21 AM
Hello everyone,
I used planahead to fix the timing problems of a 1.8Ghz 32k channel
spectrometer in roach 2. I did it without troubles, using 38% of the
DSP and less of the 50% of RAMs..
After I compiled the model with the new constrains/placement and I
tested the bof, I found out that the numeric noise increased a lot as
the power of the harmonics...
This issue results in a big decrease of the dinamic range of the
spectrometer in the whole BW (around 25 db against 40-45 db of a
1.8Ghz 16 k ch spectrometer that didn't need planahead)
I encountered this problem with an 1.8GHz 8k ch aswell.. so the issue
is not related with the increase of the number of channels..
Anyone encountered this kind of problems when using Planahead? As I
understand planahead shouldn't change the performance because it
doesn't make any change in the designs...
Any help will be appreciated!
Best Regards,
Raul Sapunar
