Hello,
I'm new to CASPER and am trying to implement a million channel spectrometer
on ROACH2 with the katADC. Does anyone know of any useful resources or has
done something similar?
I have experience using Vivado for newer FPGA development and am
comfortable with Verilog & VHDL. I'm not famil
Hello Molly,
We have done something broadly similar using ROACH2 and katADC, but only
1024 channels:
https://github.com/ska-sa/AVNRoachGateware/tree/master/WideBandSpectrometer
What frequency are you looking at? The only thing I'm thinking is that you
might struggle to get the design to meet timi
Hi Molly,
There is an old tutorial with a million channel spectrometer up here:
https://casper.ssl.berkeley.edu/wiki/Old_Tutorials
This was on the ROACH1, and used a 1024-point real FFT, a 1024x1024
transpose using QDR RAM, followed by a second 1024-point complex FFT.
If you have access to a comp
On FPGAs, ~million channel spectrometers are typically built by doing a 1024ch
PFB, followed by a matrix transpose (to collect 1024 samples of a single
channel together) and another FFT. Mostly, you'll find you run out of memory if
you try to do a million-channel FFT directly on an FPGA.
There
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