Products > Test Equipment

True analog scopes

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tautech:

--- Quote from: tggzzz on December 21, 2022, 10:13:21 am ---
--- Quote from: David Hess on December 21, 2022, 06:32:19 am ---The Tektronix 7104 can sweep faster than the speed of light, while at the same time being visible with a single sweep.

--- End quote ---

Oh, don't spoil tautech's assertion...


--- Quote from: tautech on December 20, 2022, 11:22:03 pm ---Which without some form of persistence is arguably of no use to anyone.

--- End quote ---

And definitely don't ask him how people with skill and imagination did and can use such equipment to make quite astounding advances.

--- End quote ---
With the all limited skill and imagination I could muster some years back I never found an easy way to get a waveform capture that was simple to take and quick to email, one of the primary reasons I assigned CRO's into the past. Even a manually initiated capture was far more advantageous to anything a CRO could provide let alone engaging a Single shot !

Experienced users might discount the need for captures as frivolous but they aren't to the novice as is proven by the numerous captures on this forum of those seeking help to understand what they see.
Here on the blog and some 20+ yrs later collecting screen captures with phones and uploading them is commonplace while substandard to having settings plainly visible on the display.

Those that haven't yet embraced DSO's are also unaware how user focus changes once some muscle memory develops your eyes rarely leave the display as settings are displayed there rather than need to have eyeballs walk around a CRO to arrive at how it was set up.

tggzzz:

--- Quote from: adam4521 on December 20, 2022, 09:17:51 pm ---I think, to summarise this energetic thread, that ‘true analog scope’ aka CRO has for some time transitioned to heritage technology.

--- End quote ---

Many CROs are actually digital/digitising.

(Cathode Rays are part of the output technology, whereas analogue/digitizing is the input technology).

Some Cathode Ray Oscilloscopes are both analogue and digitising, usually called "combiscopes" or similar.


--- Quote ---So even if CRO is not for electronics any more, the concept, what was achieved with these machines, still worthy of respect. Might help explain why some of us still hang on to them.

--- End quote ---

All technologies have advantages and diaadvantages.

Newer technologies hopefully have advantages over older technologies. That doesn't mean older technologies are useless. Neither does it mean newer technologies don't have disadvantages.

Engineers should be capable of choosing the most appropriate (in a very wide sense) technology no matter what buckshot salesmen and managers utter, and should be able to make the best of whatever is available.

tggzzz:

--- Quote from: tautech on December 21, 2022, 07:31:00 pm ---
--- Quote from: tggzzz on December 21, 2022, 10:13:21 am ---
--- Quote from: David Hess on December 21, 2022, 06:32:19 am ---The Tektronix 7104 can sweep faster than the speed of light, while at the same time being visible with a single sweep.

--- End quote ---

Oh, don't spoil tautech's assertion...


--- Quote from: tautech on December 20, 2022, 11:22:03 pm ---Which without some form of persistence is arguably of no use to anyone.

--- End quote ---

And definitely don't ask him how people with skill and imagination did and can use such equipment to make quite astounding advances.

--- End quote ---
With the all limited skill and imagination I could muster some years back I never found an easy way to get a waveform capture that was simple to take and quick to email, one of the primary reasons I assigned CRO's into the past.

--- End quote ---

Wow. What a revealing assertion!

When not in my own lab using my own equipment, a camera is the fastest, simplest, and easiest way to capture a waveform. Imperfect example taken quickly under non-stop circumstances but one where the information has been admired by those interested in more than prettiness:


Even in my own lab, it is fast and easy!

Or are you unable to use a digital camera and attach a photo to email?! Is that beyond your imagination?!

tggzzz:

--- Quote from: tautech on December 21, 2022, 07:31:00 pm ---
--- Quote from: tggzzz on December 21, 2022, 10:13:21 am ---
--- Quote from: David Hess on December 21, 2022, 06:32:19 am ---The Tektronix 7104 can sweep faster than the speed of light, while at the same time being visible with a single sweep.

--- End quote ---

Oh, don't spoil tautech's assertion...


--- Quote from: tautech on December 20, 2022, 11:22:03 pm ---Which without some form of persistence is arguably of no use to anyone.

--- End quote ---

And definitely don't ask him how people with skill and imagination did and can use such equipment to make quite astounding advances.

--- End quote ---
Those that haven't yet embraced DSO's are also unaware how user focus changes once some muscle memory develops your eyes rarely leave the display as settings are displayed there rather than need to have eyeballs walk around a CRO to arrive at how it was set up.

--- End quote ---

Those that have used digitizing scopes in anger for non-trivial measurements know:

* many important settings are not shown on the display
* the pain of chasing through multilevel menu to find/access a relevant setting
* settings that are shown are often cryptic and difficult to understand, except by those familiar with the specific scope's display
It is easier, of course, if you are only selling using one manufacturers scopes. Most of us are using scopes from several manufacturers, each with their own GUI and quirks.

Personally I've only used HP, Tektronix, Digilent, Rigol digitizing scopes. I haven't used the ones you sell, Siglent; maybe they are perfect.

H713:
Tautech does bring up a solid point, and what is IMO the MAIN reason to use a DSO over an analog scope, and that's the ability to capture single-shot events.

If you're dealing with anything that is pulsed, an analog scope is a PITA. Pulsed systems are all over the place now - power supply startup behavior, communication that happens in response to a user input (button push, etc).

You could use an analog storage scope. You could use a triggered scope camera. I sure wouldn't want to though...

And if you need to change the time base after taking the shot? Out of luck.




Also, let's differentiate between scopes with CRTs and analog scopes. The HP 54600 and Tek TDS380 both have CRTs, but have a lot more in common with a modern Siglent than they do with a Tek 465 or any other analog scope.

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