this is new for us and we're using studio. > > From: "richard moffat" <richard.moffat@xxxxxxxxxxxxxxxxxxx> > Date: 2005/02/21 Mon PM 05:20:17 EST > To: <icu-pcb-forum@xxxxxxxxxxxxx> > Subject: [PCB_FORUM] Re: high speed board material. > > Wow, that's fast. Time to apply all your SI and EMC knowledge, and then > some! > > >>> sjcharles@xxxxxxx 22/02/2005 11:09:35 a.m. >>> > sorry about the edge rate i think that should be around 50 pico sec. > > > > From: "richard moffat" <richard.moffat@xxxxxxxxxxxxxxxxxxx> > > Date: 2005/02/20 Sun PM 02:52:42 EST > > To: <icu-pcb-forum@xxxxxxxxxxxxx> > > Subject: [PCB_FORUM] Re: high speed board material. > > > > Hi > > > > Yeah, similar - we run up to 3.125GHz at the moment. The biggest > thing > > we have to worry about is loss and skin effect. > > > > Are you sure the edge rate is 9ns? That's huge. For PCI it > probably > > should be ~ 200-300 ps or so, at a guess, depending on the chip > > technology. > > > > Cadence put put GHz simulation tools, but they are expensive. > > > > Cheers, > > Richard > > > > >>> austin@xxxxxxxxxxxx 19/02/2005 11:49:32 a.m. >>> > > Hi, > > > > FR-4 is fine for your specs below. I have FR-4 boards that run > > Infiniband > > 4x (2.5GHz x 4 signal lanes), and no problem. That's the highest > I've > > gone > > on FR-4. I do suggest you do simulation though, and you pay careful > > attention to routing rules. > > > > BTW, 1GHz better have better than a 9ns edge rate, or you won't get > > any > > signal ;-) > > > > Austin > > > > > > > -----Original Message----- > > > From: sjcharles@xxxxxxx [mailto:sjcharles@xxxxxxx] > > > Sent: Friday, February 18, 2005 11:37 AM > > > To: icu-pcb-forum@xxxxxxxxxxxxx > > > Subject: [PCB_FORUM] Re: high speed board material. > > > > > > > > > speed 1 ghz, 8 ly, 1/2 oz, rate edge approx 9n, 5/5 width and > > > spacing maybe 4 > > > for necking. two or threes pair controlled Z. If Fr4 will do the > > > job then i that > > > would be fine. > > > > > > thanks > > > > > > ----------------------------------------------------------- > > To subscribe/unsubscribe: > > Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx > > with a subject of subscribe or unsubscribe > > > > To view the archives of this list please login at > > //www.freelists.org. 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