For some dumb reason I have several of them, I have the HP 5004 and 5006, a bug trap sig analyzer and a Kurz Kasch model. All are basically about the same, at least as much as I use them. Honestly, I find I seldom use signature analysis. About the only time it really comes in handy is working on vector mathboxes. But it's nice to have it for well documented projects, like the cinematronics boards.
James
Gosh I thought I was the only "dummy" with 3 sig analyzers in the house. I've got the Bugtrap (My personal favorite) Kurz Kash and the Cat Box. If anyone is interested in the KK box I'll sell it or trade it. I've also go the KK eprom copier & several modules if anyone has any need for that (read vintage equipment). My use of a SA? Well I was fighting enough with Bally pinball boards MPU 17 & 35 that I went thru & did some SA. I started to do Pac-Man but the buffering circuits complicates SA implimentation. I have used the SA on Pac-Man to catch funky 74ls161's in the timing section. This is a rare case where a using an O-scope the way I do (probe, see if the signal is full range & looks "normal") would not have found the faulty 74ls161, since the outputs were toggling & appeared to work, they just were not correct. I have unsuccefully SA a Battlezone Math box before. The SA is an okay tool, it will be more powerful the more people document & share Signatures. I'd take an O-scope of a SA any day but the SA is cheaper and depending on your focus not a bad tool. Kev mowerman@erols.com http://www.erols.com/mowerman