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| Rohde & Schwarz Oscilloscopes - Questions/Comments? Let me know! |
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| Rich@RohdeScopesUSA:
--- Quote from: technogeeky on May 31, 2017, 10:50:04 pm ---Simple question (inspired discussion in the Rigol bugs thread): Does R&S, at any point, ever discuss the the open-sourcing (or otherwise free) release of source code or firmware at any point during the entire history of a product (from design through to obsolescence)? Why, or why not? If it easier to provide an answer by restricting the domain to oscilloscopes, then please do. It occurred to me that, while we all discuss and speculate reasons which we believe obviate the need to keep software closed and locked up, I wondered if the guys making test gear actually have the discussion internally or not. If not, why not? Surely there are upsides and downsides. I suspect companies as large as R&S, Keysight, Tek, etc. also have educational programs and educational outreach. Perhaps that is a group of people internally could ask the original question from a different viewpoint: is there a point in a product lifecycle that the educational benefit of a source code release outweighs the need for competitive advantage for the techniques used within? I don't mean to antagonize or anything, either: I genuinely thought that maybe the question (what do we lose and gain by open sourcing for this product, at this time?) isn't even being raised at any point in the lifetime of something like an oscilloscope. --- End quote --- Not antagonistic at all and a really good question IMHO. But it's not something I'm involved in at R&S. :( -Rich |
| The Electrician:
Hi, Rich, I have a question about the probe compensation waveform on the RTO1000 scopes. It appears to have a very fast rise time, apparently less than 1 nanosecond. I've never seen such a fast risetime on previous scopes I've used. The user's manual doesn't say anything about rise time of this signal. Can you find out what the nominal rise time is? Thanks. |
| Hydron:
--- Quote from: The Electrician on June 09, 2017, 04:53:22 pm ---Hi, Rich, I have a question about the probe compensation waveform on the RTO1000 scopes. It appears to have a very fast rise time, apparently less than 1 nanosecond. I've never seen such a fast risetime on previous scopes I've used. The user's manual doesn't say anything about rise time of this signal. Can you find out what the nominal rise time is? Thanks. --- End quote --- I second this question but for the RTB2k. It's fast enough that I can't measure it properly with the scope itself. Also knowing the impedance would be useful, thanks! |
| Rich@RohdeScopesUSA:
Hi Hydron and The Electrician - for both the RTB2000 and the RTO1000/2000 the probe compensation signal's rise-time is quite fast (100s of picoseconds vs most scopes are typically 10s of nanoseconds). We don't spec it but I'll see if I can find out the exact rise-time. There are benefits and drawbacks to a fast rise-time on the probe comp signal. If you use the typical alligator clip ground, you'll see ringing caused by the inductance of the extended ground lead (drawback). But the benefit of the fast rise-time is it allows us to provide a high-frequency adjustment to the probes when you use the short spring clip ground (or on the RTB2000 it has a very elegant way of doing the probe comp with no ground accessory needed). Hope this helps. -Rich |
| Hydron:
Hi Rich, Thanks for the info - was mainly interested in confirming that it was well under 1ns. The fast rise time is certainly useful - benefits definitely outweigh the drawback of needing a proper ground (if anything it teaches the user a lesson in good grounding :P) On another note, did you ever find out about how the fan noise/speed control is meant to work in the RTB series? It was mentioned a while back - it seems that some users find their units very quiet, but others (unfortunately I'm among them) find theirs far from it. It's not a disaster, just strange that some find it quiet, some not, and I'd like to know if there is a problem or if it's just variability in the fan itself (or user's ears/noisy lab environment!). Note that it seems that the fan is running at full speed or close to it, rather than under thermal control. |
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