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True analog scopes

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dave j:

--- Quote from: BillyO on December 23, 2022, 09:21:42 pm ---It seems Dave J. likes to have a CRO around too.
--- End quote ---

Oi. I have enough messages from people asking me to review their products in videos because they've confused me with this site's owner ( |O) without you adding to the problem by referring to him using my forum name (see sig). :)

mawyatt:
The basic problem with the Scope-Sweep Generator method for Bode Plots, and we've used them in the past, is the lack of Vertical dB scales (linear Vertical screen resolution limited to 30~40dB range, and no dynamic V axis scaling), and the lack of any direct Phase plots. The modern DSOs under discussion do a respectable job here, some completely self-contained (built-in AWG), have dB Vertical scales (some with dynamic scaling over 100dB), direct Phase plots, and allow direct digital document recording/printing of the results.

Recall long ago doing the analog Scope-Sweep Generator Bode routines, and having to capture photos of the scope screen, and having very limited Linear vertical scale factors, then having to generate the phase plots by measuring the time delay shift between scope channels, calculating the phase shift, tabulating and hand creating a Phase plot on the Xerox scanned magnified version of the Polaroid image of the scope screen.  :P

We'll take the DSO Bode capability over this Scope-Sweep Generator routine any day, thank you!!

Sure if one has direct access to a Network Analyzer (we did, but these were often under use by others) that's better than the Scope-Sweep Generator routine, or even the modern DSO Bode capability. However, many don't have direct access to a NA, and they tend to be very expensive, even on used market, so a DSO at hand (if available) can serve a very useful purpose here.  :-+

Been around a long long time and done just about every imaginable measurement possible, often even having to design our own test equipment because nothing was available from anyone that could do what was required measurement-wise. Must say these new DSOs are remarkable in the ability to do almost anything and everything a quality analog (Tek) scope could do, and also perform respectable measurements that other dedicated equipment was often acquired for. To add icing on the cake, the relative cost of these modern DSOs is modest, especially compared to their overall capability.

This is from an old diehard analog type, that spent 60+ years with Tek and HP equipment, and finally decided to get our own modern DSO a few years ago (long story) to play around with ;)

Best & Happy Holidays

 

nigelwright7557:
I still use an analogue scope.
Bought it about 10 years ago for £45 on ebay.
Channel 2 was faulty when I bought it and still is but can be used if a voltage offset isnt a problem.

I find using software on microcontroller to output signals a distance apart I can get the analogue scope to trigger better.

Most of the stuff I design and build is sub 20MHz so it works fine.

tautech:
Something I don't miss at all with analogue scopes....all the mental arithmetic just to use the scope vs a DSO that when set correctly excludes all that BS and instead lets you focus on the DUT measurement instead.

Pinched from another thread as a fine example:

Apparently using a 100x probe.

 :horse:

tggzzz:

--- Quote from: tautech on December 26, 2022, 08:02:25 pm ---Something I don't miss at all with analogue scopes....all the mental arithmetic just to use the scope vs a DSO that when set correctly excludes all that BS and instead lets you focus on the DUT measurement instead.

--- End quote ---

Aw. Bless.

It is really kind of young people to make graybeards feel younger, by favourably comparing graybeards' deteriorating cognitive abilities with the non-deteriorated abilities of the youngsters.

Maybe that suggests a new sales pitch targeting a new demographic..
"Starting to have problems with mental arithmetic? Never mind; conceal it by buying a Siglol oscilloscope".

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