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Let’s Talk About LeCroy Scopes, AKA… the “Wuerstchenhund Holds Court” Thread

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2N3055:

--- Quote from: nctnico on August 04, 2022, 09:59:35 am ---
--- Quote from: PartialDischarge on August 04, 2022, 09:13:04 am ---I just want to see how it is activated and that it works, even just for the usec division which is not much for these scopes, I don’t have access to one of these.  I have had already 2 customers who have these scopes but seem to have no idea on how to setup this mode or that it exists. There is serious lack of basic knowledge on how to measure with a scope in young engineers today, people measuring noise in pkpk instead of rms etc...

--- End quote ---
If those scopes have some options, it is very likely that these include signal filtering. From my experience with Lecroy scopes these are even harder to setup but have the potential to create much steeper high pass, band pass and low pass filters which could be a better solution to isolate signals which live in a certain frequency band.

@2N3055:  I'd don't think the Eres principle is the problem but the user interface. From what I have seen from my Lecroy Wavepro 7k is that it is very powerfull but getting math & functions going, is far from trivial. You really need to know what you are doing and what you are after.

If the goal is to have a scope that can do high resolution and simple averaging functions, then other brands which simply have 'high res' and average modes are far easier to drive.

--- End quote ---

I agree ease of use is important.. But saying "as simple as possible but no simpler" comes to mind.
My problem with these "other scopes" is that they have something easy but no control or explanation what is happening to your signal..
So for real control you need to embrace complexity.. You can optimize UI but in the end you will still have more parameters to set than with a scope that simply does "something" to the signal with one click...
ERes should be quite simple: enable it and choose how many bits you want.. I attached excerpt from manual. And, quite frankly, people who cannot be bothered to read that much and understand it will have problems with basic electronics... Yes, I know, that sounds abrasive and insulting, but it is truth. 

If I had Wavepro 7000, I would buy a small Rigol, Siglent, Micsig etc.. in addition to it for noncritical daily type of work..
Not because Wavepro is too complicated, but it takes more time to setup. Like you say.  I agree with that. Saving time is important. But sometimes it takes hours to setup experiment. Scope setup time becomes miniscule part of that time.

Someone:

--- Quote from: Martin72 on August 04, 2022, 06:10:30 pm ---With eres, the signal is clear.
--- End quote ---
The "same" +3 bits of enhancement produced different results and frequency cutoff ? Even when the timebase/samplerate seems to be the same?

Martin72:
I didn´t change anything when swapped to the math functions.

PartialDischarge:
C1 has a 20MHz low pass filter applied to it, but It seems the math function is taking the raw data from C1, which in part makes sense

Performa01:

--- Quote from: Someone on August 04, 2022, 10:01:16 pm ---
--- Quote from: Martin72 on August 04, 2022, 06:10:30 pm ---With eres, the signal is clear.
--- End quote ---
The "same" +3 bits of enhancement produced different results and frequency cutoff ? Even when the timebase/samplerate seems to be the same?

--- End quote ---

Martin used the 20 MHz bandwidth limiter for the input channel. So it's only consequent that the reported bandwidth in the channel menu cannot exceed 20 MHz.

By contrast, the math function does not care about the bandwidth limited source and reports the full ERES bandwidth.

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