Re: HP Logic Comparators

Hi,

I have bought one of these as well, and it seemed a cool idea but having
read the manual it has a restricted operating frequency that's below
video clock in many games.

Has anyone tried using a sig-gen to replace a xtal with a slow clock and
had better success with comparators as a consequence?

Regards,

Paul.

> Chris Toseland wrote:
>
> 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
Received on Mon Jul 28 14:05:04 2003