Products > Test Equipment

Signature analyzer project

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PaulAm:
I investigated the sigrok functionality and I can say that it works, more or less.  Signatures are a bit unstable and, comparing that with a 5004a, it is not a great troubleshooting tool.  Better than nothing and it's cheap, but I wouldn't give it a great recommendation.  I'm not sure what the max clock frequency would be, maybe 10MHz?  I haven't done any tests on that.

I'm not doing this project because I need a signature analyzer; I have 3.  I'm doing it because it annoys me that an instrument with such limited application has gotten so ridiculously expensive and I'd like to see those who need one have a reasonable option.

ekoloski:
Great work! I never did find a SA myself, and with the prices these days I doubt I will pick one up unless a repair gets too difficult. Undoubtedly one would have been pretty useful several times over the years though.

I'm going to keep an eye on this for when the project files are posted. It looks like a fun project to build, and useful to have around.

NivagSwerdna:
I actually prototyped one of these some time ago, using a small Lattice FPGA.



How much do you think someone would pay for one? 

PaulAm:
Somebody's selling something equivalent on ebay for $150, bare circuit board with some grabbers.

Looks nice.  Is there any kind of front end or do you just use ttl levels?

NivagSwerdna:
Please share the eBay link... I would be interested to know what they have.

My use case is 5V retro computing and arcade PCB so I just level shift.  It could be better.

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