low-end scope
in [Design]
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From: Joerg on 2 Mar 2010 20:17 John Larkin wrote: > On Tue, 02 Mar 2010 18:14:33 GMT, nico(a)puntnl.niks (Nico Coesel) > wrote: > >> Jan Panteltje <pNaonStpealmtje(a)yahoo.com> wrote: >> >>> On a sunny day (Mon, 01 Mar 2010 17:46:33 -0800) it happened John Larkin >>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >>> <r4roo5dd2mjre06t8glvpun5dc9hgu9p53(a)4ax.com>: >>> >>>> On Mon, 01 Mar 2010 16:49:54 -0800, Joerg <invalid(a)invalid.invalid> >>>> wrote: >>>> >>>>> Jan Panteltje wrote: >>>>>> On a sunny day (Mon, 01 Mar 2010 15:30:11 -0800) it happened John Larkin >>>>>> <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in >>>>>> <h5joo5tu7iv486nr7g4pp69r0vpco1cnuc(a)4ax.com>: >>>>>> >>>>>>> I've gotten used to small, light, color digital scopes >>>>>> Mine has color too: Green. >>>>> >>>>> Mine even glows in the dark. Now that's something DSOs can't do :-) >>>> Yeah, but how long can you hold it out at arm's length? >>>> >>>> Now whenever I use an analog scope - which is seldom - I get confused >>>> about which trace is which. I don't miss black+white TV sets, or >>>> typewriters and carbon paper, or analog VOMs, or slide rules, or 300 >>>> baud acoustic modems either. >>>> >>>> John >>> Wow, and that from somebody who swears by writing and drawing on deads trees :-) >>> And I do not miss the noise of that horrible Tek digital I once had to use for audio. >> Probably a TDS200 series. There are noisy as hell. > > My usual scope is a TDS2012. It shows a little trace noise, but it > doesn't bother me. An analog scope trace would be as fuzzy, unless you > use an old 547 with a two-foot-long CRT. > > Analog scopes just aren't quantitative like digitals are: > > ftp://jjlarkin.lmi.net/RTD_in_air.JPG > > > Of course, audio isn't quantitative. > Try to see stuff like weak and sort-a demodulated cell phone fuzz on a large analog signal. That's where analog scopes really excel. OK, you have to darken the romm, but so what? -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Joerg on 2 Mar 2010 20:22 Paul Keinanen wrote: > On Mon, 01 Mar 2010 12:32:34 -0800, John Larkin > <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: > [...] >> I'd rather not have a scope that runs Windows and that needs two >> boxes, drivers, a USB cable, and a mouse to do anything. A real scope >> will most likely still be working 20 years from now. I like real >> scopes with lots of real knobs. >> Me, too :-) >> A USB scope would make sense in some data-centric application where >> the waveform needs to be shipped into Matlab or some such in real >> time. >> >> John > > For me, built in battery power would be a critical requirement so that > you could use it as easily as a multimeter. > Most DSOs such as mine come with a battery option. I didn't order that but AFAIK it runs several hours on a charge. [...] -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: George Herold on 2 Mar 2010 22:44 On Mar 2, 10:02 am, John Larkin <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: > On Tue, 02 Mar 2010 12:56:23 GMT, Jan Panteltje > > > > > > <pNaonStpealm...(a)yahoo.com> wrote: > >On a sunny day (Mon, 01 Mar 2010 17:46:33 -0800) it happened John Larkin > ><jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote in > ><r4roo5dd2mjre06t8glvpun5dc9hgu9...(a)4ax.com>: > > >>On Mon, 01 Mar 2010 16:49:54 -0800, Joerg <inva...(a)invalid.invalid> > >>wrote: > > >>>Jan Panteltje wrote: > >>>> On a sunny day (Mon, 01 Mar 2010 15:30:11 -0800) it happened John Larkin > >>>> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote in > >>>> <h5joo5tu7iv486nr7g4pp69r0vpco1c...(a)4ax.com>: > > >>>>> I've gotten used to small, light, color digital scopes > > >>>> Mine has color too: Green. > > >>>Mine even glows in the dark. Now that's something DSOs can't do :-) > > >>Yeah, but how long can you hold it out at arm's length? > > >>Now whenever I use an analog scope - which is seldom - I get confused > >>about which trace is which. I don't miss black+white TV sets, or > >>typewriters and carbon paper, or analog VOMs, or slide rules, or 300 > >>baud acoustic modems either. > > >>John > > >Wow, and that from somebody who swears by writing and drawing on deads trees :-) > >And I do not miss the noise of that horrible Tek digital I once had to use for audio. > > The digitals have pixels and adc quantization, but the difference re: > an analog scope is more psychological than real. If you use signal > averaging, a digital scope will pull signals out of noise as no analog > scope can. > > I own about 60 oscilloscopes and can take my pick. 99% of the time > it's digital. And by our standards "audio" is crude. > > John- Hide quoted text - > > - Show quoted text - Yeah!! signal averaging is great for getting good signals from a digital 'scope. I wish our 200MHz Tek had more than 128 averages. (Trigger on the top of a noise signal and you can pick out all sorts of coherent crude.) George H.
From: miso on 3 Mar 2010 15:29 On Mar 2, 5:22 pm, Joerg <inva...(a)invalid.invalid> wrote: > Paul Keinanen wrote: > > On Mon, 01 Mar 2010 12:32:34 -0800, John Larkin > > <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: > > [...] > > >> I'd rather not have a scope that runs Windows and that needs two > >> boxes, drivers, a USB cable, and a mouse to do anything. A real scope > >> will most likely still be working 20 years from now. I like real > >> scopes with lots of real knobs. > > Me, too :-) > > >> A USB scope would make sense in some data-centric application where > >> the waveform needs to be shipped into Matlab or some such in real > >> time. > > >> John > > > For me, built in battery power would be a critical requirement so that > > you could use it as easily as a multimeter. > > Most DSOs such as mine come with a battery option. I didn't order that > but AFAIK it runs several hours on a charge. > > [...] > > -- > Regards, Joerg > > http://www.analogconsultants.com/ > > "gmail" domain blocked because of excessive spam. > Use another domain or send PM. That's one mighty expensive battery option: <http://www.tesales.com/commerce/ccpc1009-2859-instek-gds-2000-battery- option-for-gds--2000-seri-gds-2000-battery-gds-2000-battery.htm>
From: Joerg on 3 Mar 2010 16:04
miso(a)sushi.com wrote: > On Mar 2, 5:22 pm, Joerg <inva...(a)invalid.invalid> wrote: >> Paul Keinanen wrote: >>> On Mon, 01 Mar 2010 12:32:34 -0800, John Larkin >>> <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: >> [...] >> >>>> I'd rather not have a scope that runs Windows and that needs two >>>> boxes, drivers, a USB cable, and a mouse to do anything. A real scope >>>> will most likely still be working 20 years from now. I like real >>>> scopes with lots of real knobs. >> Me, too :-) >> >>>> A USB scope would make sense in some data-centric application where >>>> the waveform needs to be shipped into Matlab or some such in real >>>> time. >>>> John >>> For me, built in battery power would be a critical requirement so that >>> you could use it as easily as a multimeter. >> Most DSOs such as mine come with a battery option. I didn't order that >> but AFAIK it runs several hours on a charge. >> >> [...] >> >> -- >> Regards, Joerg >> >> http://www.analogconsultants.com/ >> >> "gmail" domain blocked because of excessive spam. >> Use another domain or send PM. > > That's one mighty expensive battery option: > <http://www.tesales.com/commerce/ccpc1009-2859-instek-gds-2000-battery- > option-for-gds--2000-seri-gds-2000-battery-gds-2000-battery.htm> Yeah, but you wouldn't want to know what mainstream manufacturers charge for this stuff. It's a boutique accessory, very few people need it, meaning low sales volume and somehow the NRE has to be amortized. Part of life :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |