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capn-freako / PyBERT

Serial communication link bit error rate tester simulator, written in Python.
BSD 3-Clause "New" or "Revised" License
95 stars 54 forks source link

Add COM metric reporting. #31

Open capn-freako opened 6 years ago

capn-freako commented 6 years ago

The Channel Operating Margin (COM) method of measuring high speed serial communication channel performance is becoming more and more popular. I'd like to add this ability to PyBERT.

capn-freako commented 9 months ago

I think this Anritsu white paper is a great reference for the details of COM calculation. (In particular, see Sec. 3.)

Most other references I'm finding tend to refer the reader to M-code scripts and MS Excel spreadsheets, which aren't very helpful to us writing Python code.

dracid commented 7 months ago

I've been hunting the COM code for some time :)) It's actually openly accessible here: https://www.ieee802.org/3/df/public/tools/index.html

mellitz_3dj_02_elec_230817_COM_v4p1_update.zip mellitz_3df_02_2211_com_v3p9.zip

version 4.1 has the latest code, but no config sheets. version 3.9 has the code AND a few example of the config sheets.

Yes, it's an M file for Matlab (not Octave). I haven't yet found if anyone has re-implemented it in python.

capn-freako commented 7 months ago

Yes, it's an M file for Matlab (not Octave). I haven't yet found if anyone has re-implemented it in python.

Thanks, @dracid ! I've taken a first stab at this and am wondering if you might have time to look over my code and comment: https://github.com/capn-freako/PyBERT/blob/860e34a068084d1865857b2ee3e48c2a871cd717/src/pybert/utility.py#L1487

Thanks! -db