Re: Signature Analysis/CAT Box question

There is no difference between the Cat Box signature analysis and an HP or
Fluke signature analyzer. They were trying to sell Cat Boxes after all...
I am sending Al the info that I have accumulated on Sig. Analysis,
including some manuals from HP that cover the theory and application of the
process. I imagine he will put it up on spies when he gets a chance. I
suspect he has a life besides scanning...seems to travel a bit...(Hi Al!)

John :-#)#

At 12:19 AM 10/10/1999 -0400, you wrote:

>I have been trying to repair a Space Duel board recently that has me a
>little stumpped at the moment. Using a Fluke 9100, all RAM/ROM test OK, but
>it still won't go into the test screen. This leads me to the conclusion
>that is is a vector generator problem. While looking for other ways to
>troubleshoot this, I began looking through the CAT Box test procedures in
>the schematics and came to the Signature Analysis section which tests a
>number of the control lines like VGGO. I've done sig analysis on Battlezone
>boards where it is all built into the board, but Space Duel wants the CAT
>Box to do the analysis. It just says to put the CAT Box in signature
>analysis mode. Trying to figure out what that did, I looked in the CAT Box
>manual from Spies and it just says that it increments the address lines.
>Does anyone know more specifically what the CAT Box does in signature
>analysis mode? If it is just repeatedly incrementing the address lines,
>does anyone know what the beginning and ending addresses are? Hopefully, I
>can simuluate whatever the CAT Box is doing on the Fluke.
>
>Thanks,
>-Chris

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Received on Sat Oct 9 23:36:23 1999