There was a fair discussion just a few months ago about this topic. If you'd ask me, remember that the old PDP-11 clock signals are below 20 MHz, so you don't need a 1 GHz sampling 'scope :-) But a decent 50-60 MHz dual-trace is not bad. For these tools, they work best if the "man using the tool" knows what he (she, if it's Allison) is doing, and knows the *limitations*, and interprets the signals or data (try to understand what (s)he sees). For logic analyzers, check out for example eBay, but make sure that it is complete with the correct wires and pods! Don't go for a LA without the pods. Useless. And buying the pods later, which is sometimes possible, is costly in the end. Just my thoughts, no intention to start a thread on this topic. Perhaps something for the ClassicComp Knowledge Base? ( http://www.classiccmp.org/kb/ <http://www.classiccmp.org/kb/> ) - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard Verzonden: vr 06-01-2006 21:53 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Recommended logic analyzer/scope tools? (was: RL02 write faults,fixed it! Another cable mistake) In article <447524F844B59D48B8F7AE7F560935EE02CE2288 at OVL-EXBE01.ocevenlo.oce.net>, "Gooijen, Henk" <henk.gooijen at oce.com> writes: So what would y'all recommend for logic analyzer/oscilloscope type tools that are useful for vintage computing (i.e. their max bandwidth/speed can be slower than needed for current tech) that are also affordable? I know Tektronix and HP are major manufacturers in this area, but I would know what to get. *Lots* of these items go up for auction via government liquidation at the local Hill AFB, so if I know what I'm looking for I should be able to eventually get something by low-bidding. Suggestions? -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/ <http://www.xmission.com/~legalize/book/> > Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org <http://pilgrimage.scene.org> > This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.