As James noted I did have a bit of a web site on this tool. The manual is also on spies. (http://www.spies.com/~arcade/TE/) under Ecomms, which elaborates a bit on which chips you need to perform setups etc.. on.

I know that I've blown out individual channels on my bug trap in the past that require chip replacements, perhaps you've got something similar?

Kev

Hi All,

This Weekend I've been trying to use my HP Logic Comparator to help fault find some boards and am getting some very hit and miss results.

What I'd like to know is are there certain chips that this equipment won't test correctly?

I know that if an output is onto a bus it'll read bad but what about simple stuff like 74ls04 it fails that then works fine with a 74ls08. It definately doesn't like 74ls283's.

I have tried 3 or 4 different comparison IC's so it's not down to a bad one of them.

It even fails chips on known working boards that I'm using for signal comparison with the scope.

I'd like to use it so I can some of my backlog out of the way but it seems just to unreliable for serious fault finding.

Do I just put it down to tarnished IC legs or something? Any of you have any input?

thanks

Chris

http://www.muppzlab.co.uk