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From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: Instead scopes
Date: Wed, 28 Aug 2024 17:41:33 -0000 (UTC)
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Sergey Kubushyn <ksi@koi8.net> wrote:
> john larkin <jlarkin_highland_tech> wrote:
>> On Wed, 28 Aug 2024 04:28:02 -0000 (UTC), Sergey Kubushyn
>> <ksi@koi8.net> wrote:
>> 
>>> john larkin <jlarkin_highland_tech> wrote:
>>>> On Tue, 27 Aug 2024 14:55:32 -0400 (EDT), Martin Rid
>>>> <martin_riddle@verison.net> wrote:
>>>> 
>>>>> john larkin <jlarkin_highland_tech> Wrote in message:r
>>>>>> On Tue, 27 Aug 2024 10:40:15 -0400 (EDT), Martin
>>>>>> Rid<martin_riddle@verison.net> wrote:>Anyone own the gds-1202b
>>>>>> ?>>Any good?>>$350 at tequipment>>CheersI haven't tried that one. We
>>>>>> like the Rigols.I recently acquired a
>>>>>> Siglenthttps://www.amazon.com/gp/product/B06XZML6RD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1and
>>>>>> gave it to one of my engineers. I'll ask him how he likes it.It has
>>>>>> an up-front DEFAULT button, which a digital scope needs to getyou
>>>>>> out of nightmare states.
>>>>> 
>>>>> Other than the lack of software features,  the 200mhz bw for 350
>>>>> dollars is intriguing. 
>>>>> 
>>>>> Cheers
>>>> 
>>>> It sounds pretty good to me.
>>>> 
>>>> https://siglentna.com/wp-content/uploads/dlm_uploads/2020/02/SDS1000X-E_DataSheet_DS0101E-E04C.pdf
>>>> 
>>>> What's missing?
>>>> 
>>>> I like the 500 uV/div.
>>> 
>>> If you want to save the last penny, maybe. But you can get way better scope
>>> for slightly more -- Rigol DHO800/DHO900. It is 12-bit, same 550uV/div, has
>>> all standard serial protocols decoding, very light and compact, can work
>>> from a battery with USB-C power connector, way better than that Siglent that
>>> feels like relic next to those DHOs.
>> 
>> We use almost all Rigols at work. My slow bench scope is a 500 MHz
>> DS4034 (upgraded from 350 MHz)
>> 
>> https://www.dropbox.com/scl/fo/ns08x686afbayjsw8c2ab/h?rlkey=iu4h89057t755pueg4ijnldbo&dl=0
>> 
>> and my fast scope is a Tek 11802 sampler.
> 
> I also have one, 11801C. Couple of SD-24s, SD-20, and SD-22 heads :)
> 
>>> I don't have any relation to Rigol, just have DHO924S as a go-to scope on my
>>> bench and DHO814 for use as an advanced multimeter wherever I need a
>>> portable one. I like them and I can run them in a web browser if needed.
>> 
>> I bought the Siglent as a gift, and I was curious about it.
>> 
>>> 
>>> I do have an advanced LeCroy WR640Zi with all options for serious jobs -- it
>>> is 40GS/s 4GHz bandwidth instrument with all features imaginable -- but I
>>> rarely power it up. It makes a noise like a jet at takeoff (Rigol DHO is
>>> very quite) and it is 8-bit so what you get on the screen looks ugly
>>> comparing with 12-bit DHO. DHO924 covers 99% of real world debugging so
>>> LeCroy is mostly gathering dust...
>> 
>> So is ours! It cost $50K.  It doesn't make much sense and there is
>> basically no support. It doesn't make sense to them either.
> 
> Yep, all those features are nice but very rarely needed in the real life.

Next to my bench, I have a couple of TDS 784As, a TDS 694C, an 11801C, and
an 11802 that JL kindly donated when I went out on my own, lo these fifteen
years ago. Also several SD-14s and SD-24s, plus at least one of all the
other heads except the SD-32. 

I use them all regularly. 

My favorite is the 694C—3GHz, 10GSa/s simultaneously on all four channels.
It’s 50 ohms only, but I also have the matching 4GHz FET probes. 

A 12-bit scope might be useful if the ENOB is anything like that, but I
have doubts, especially in a 250 MHz bandwidth. 

Cheers 

Phil Hobbs 

Cheers 

Phil Hobbs 


-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics