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Hello Everyone, Thank all of you who responded to this query and Raymond in particular.? I hope that there are a few other people in the group who benefited from this discussion.? I certainly did.?

I just got bit by this yet again. Does anyone know if it was fixed and what ROM version fixes it? Doing an "autoset" fixes it, but as I have not been able to identify what triggers it, it's hard to

Thank you Siggi for your email and information. I'll work on the scope today, despite needing to assemble few computers for my customers..... I was working way to hard and sometimes I need to

OK, thanks for this information Dennis! I think I wanted to make sure nobody's feelings are hurt.... But I'll stop answering the emails that aren't directly related to me. This setup is very different

Keep an eye out for a plastic flower pot at Home Depot.Cut or enlarge the hole in the bottom. HankC, Boston, WA1HOS

Have a look here for something special, a bit more extreme: <http://www.ggb.com/> Raymond

And a lot lower loss at higher frequencies. Loss can be a little hard to gauge with the usual TDR. The whole point behind the fancy tek cable is that the amplitude accuracy of the SG503 requires the

Hello from Dublin, Ireland. I have a question some of you knowledgeable folks might be able to advise me on. I have two apparently similar scopes, a TDS 320 (100 MHz, 500 M samples/sec) and a TDS 350

The other things to download and read cover to cover are the Concepts series books "Oscilloscope Probe Circuits", "Probe Measurements" and "Sampling Oscilloscope Circuits" Craig

I'd second that. Also the ABC of Probes was published at intervals, and the content changed as time went by. Craig

Having got one of the fancy Tek cables we've been discussing, I tried precisely that a couple of years ago with my 7S12. I could find absolutely no difference at all between that and bog standard

You may want to look for an old-fashioned Lo-Z probe like a P6056 (500 Ohm) or P6057 (5000 Ohm). Even with their standard BNC connection, they work well with your more modern digital 'scope and can be

Hi Jack, I would recommend thoroughly reading the downloaded document again. Just having a quick look at it just now revealed relevant content at least on page 10 ("Usually, the loading of greatest

that depends on the circuit. Lots of RF circuits are 50 ohms, some 75. However, high speed TTL, ECL, and the like circuits fake being RF (and quite well, since the boards often have to be designed

I have found a similar problem, not with probes, but with circuits. The higher the impedance, the more that the circuit capacitance limits the bandwidth. Most of the 200 Mhz or higher circuits look

Hi All. Thanks for linking for the album - I'll work out how to do that for next time. I've added an annotated photo showing my interpretation of the -5V traces on start-up (

Hi Raymond, Thanks for your ever so prompt response.?? I am not missing the ABC's of probes and in fact have previously read it a few times. Rather than look for my paper copy, I just downloaded it

Hi Jack, The only thing you're missing is a recent edition of Tektronix' obligatory document "ABC of Probes", downloadable from e..g. <https://www.tek.com/document/primer/abcs-probes-primer>. Yes, a

As a result of my recent purchase of a Tek scope with 1 ghz. bandwidth, I have begun looking for probes. I have looked at the specs for a P6243 and a TPP 1000, both rated at 1 ghz bw. Both instruction

I just purchased a TDS 600 series scope which had apparently been rack mounted. Consequently, it is missing the rear cover, handle, bottom feet and kickstand. If someone has rack mounted or has a