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From: john larkin <jlarkin_highland_tech>
Newsgroups: sci.electronics.design
Subject: Re: Instead scopes
Date: Sat, 31 Aug 2024 07:03:51 -0700
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On Sat, 31 Aug 2024 16:03:39 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:

>On 31/08/2024 3:14 am, john larkin wrote:
>> On Fri, 30 Aug 2024 14:17:14 +1000, Bill Sloman <bill.sloman@ieee.org>
>> wrote:
>> 
>>> On 30/08/2024 4:59 am, john larkin wrote:
>>>> On Thu, 29 Aug 2024 20:23:19 +1000, Bill Sloman <bill.sloman@ieee.org>
>>>> wrote:
>>>>
>>>>> On 29/08/2024 2:32 am, john larkin wrote:
>>>>>> On Wed, 28 Aug 2024 15:21:00 -0000 (UTC), 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 :)
>>>>>>
>>>>>> At the original purchase price, adjusted for inflation, I must have
>>>>>> half a million dollars worth of sampling heads.
>>>>>>
>>>>>> The color grading and jitter measurement is great on the 11801C, but
>>>>>> the old B+W screens photograph better.
>>>>>>
>>>>>> I'll miss my 11802 when it eventually dies.
>>>>>>
>>>>>> The TDR is great. I'm going to give my new kids a lecture on
>>>>>> transmission lines, and I'll show them some TDR.
>>>>>>
>>>>>> It is apparently possible these days to get an EE degree and be
>>>>>> completely ignorant of transmission lines. Or even electricity.
>>>>>
>>>>> Or a least to be able to react to John Larkin's insultingly trivial
>>>>> questions in a way that leaves him thinking that.
>>>>>
>>>>> Maybe he didn't understand the answers.
>>>>
>>>> You're impossible to talk too. Your only motivation is to insult.
>>>
>>> If your idea of a conversation is one where you get flattered nonstop,
>>> I'm not the ideal conversational partner.
>>>
>> 
>> My idea of good conversation is a group of people playing with ideas
>> and inventing stuff together. "Egoless" is the word, as in "egoless
>> programming."
>> 
>> https://en.wikipedia.org/wiki/Egoless_programming
>> 
>> I don't think you can do that. Some people are too fragile.
>
>Your opinion is noted. I doubt if the people with whom I have 
>collaborated would agree.
>
>Sloman A.W., Buggs P., Molloy J., and Stewart D. “A 
>microcontroller-based driver to stabilise the temperature of an optical 
>stage to 1mK in the range 4C to 38C, using a Peltier heat pump and a 
>thermistor sensor” Measurement Science and Technology, 7 1653-64 (1996)

You did one academic, unremarkable  temperature controller, published
in a journal, and have cited it here maybe 50 times now. Do something
new.

Here's my millikelven temperature controller.

https://www.dropbox.com/scl/fi/emxfaurnyj35t0y84tvwl/Oven_Cables_pub.jpg?rlkey=jpcnmnt1pcooz9nj7d0j4rah0&raw=1

That's a dual-stage Mach-Zender e/o modulartor whose extinction is
much better if the temperature is stable to milllikelvins. The big
hogged-aluminum box is heated by six mosfets on the bottom, and there
are four thermistors for feedback. It runs at 30C.

This is part of the modulation system for a big laser.

I really over-did it on the enclosure. It's a lot heavier than it
really needed to be.