[TangerineSDR] Notes from PSWS / TangerineSDR call of 05-03-2021

[Tom McDermott]

Notes from PSWS / TangerineSDR call of 05-03-2021

1. Grape 1 documentation:  https://hamsci.org/grape1.   Current parts list
should be up tomorrow.
Standard Grape 1 software image (from John Gibbons):
https://drive.google.com/drive/folders/1YE5UjQknnhuRUq4Y86czhxbIwzUWbgbn?usp=sharing

2. Video about Remote System Update on Max 10 FPGA (Intel):
https://www.youtube.com/watch?v=KPWOpYQD_JM

3. Discussion on CIC compensation filters. MATLAB can generate a filter to
compensate for passband droop and export the coefficients. This apparently
also works (without graphics) in OCTAVE. Scotty mentioned there is a $50
student version of MATLAB. Tom discussed measurements of gnuradio built-in
time-domain windowing filter impact on FFT scalloping and other amplitude
errors.

4. Scotty is making progress on acquiring components for first prototypes.
He's down to 3 significant missing or delayed parts. The FPGA may become
the longest lead part (it's industrial temperature range and the fastest
speed grade).

-- Tom, N5EG
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