A good digital oscilloscope?
in [Design]
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From: Joerg on 18 Dec 2009 16:07 Fred Abse wrote: > On Fri, 18 Dec 2009 07:09:37 -0800, Joerg wrote: > >> Fred Abse wrote: >>> On Tue, 15 Dec 2009 10:52:38 -0800, Joel Koltner wrote: >>> >>>> I would have to guess the the ratio of how often people damaged or >>>> ruined their starter or gearbox from trying to start without the >>>> clutch all the way in to how often someone ended up with a stalled car >>>> on railroad tracks is perhaps about a million to one? :-) >>> What's wrong with starting in neutral? AIUI, in some European >>> countries, starting with a gear engaged and clutch depressed would be a >>> driving test failure. >>> >>> >> Either one would have caused failure back in my days there. Neutral with >> the clutch released will cause the shaft of the transmission to add load >> and mass so the starter wears out faster. Also, kids could play rough in >> the car and slam into the stick. Starting while in gear is a big no-no. >> What if you sneeze and the foot slips off the clutch? > > Transmission load in neutral is minimal. Kids, if properly restrained in > the back (legal requirement in some places), shouldn't be able to reach > the shifter. > The load is minimal but the mass to be accelerated isn't minimal. > On a previous point, how many times have you been hooted at when not > starting across a railroad crossing until there was enough room for you on > the other side? > I wouldn't move the car regardless. When I was a kid I've seen the aftermatch. The whole trunk of a car was, well, gone. Luckily the driver survived. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Michael A. Terrell on 18 Dec 2009 16:31 Jim Thompson wrote: > > On Fri, 18 Dec 2009 14:50:35 -0500, "Michael A. Terrell" > <mike.terrell(a)earthlink.net> wrote: > > > > >Jim Thompson wrote: > >> > >> On Fri, 18 Dec 2009 12:00:33 -0500, "Michael A. Terrell" > >> <mike.terrell(a)earthlink.net> wrote: > >> > >> > > >> >JosephKK wrote: > >> >> > >> >> On Thu, 17 Dec 2009 03:01:47 -0500, "Michael A. Terrell" <mike.terrell(a)earthlink.net> wrote: > >> >> > >> >> > > >> >> >JosephKK wrote: > >> >> >> > >> >> >> Then it should have been done both with and without cargo. > >> >> > > >> >> > > >> >> > It was done with what we were expected to drive in Alaska at the cold > >> >> >weather research facility. It was a place where they didn't plow the > >> >> >snow. Instead, a road grader was used to turn loose snow into rough > >> >> >pack ice. Most of the winter was below -20 so the only time you > >> >> >encountered ice or water on ice was when some idiot was intentionally > >> >> >spinning their tires, or there had been an accident and the vehicle had > >> >> >melted some of the coarse ice. > >> >> > > >> >> > The flooded a parking lot the night before the test, then used a fire > >> >> >hose to keep the ice wet for the test. > >> >> > >> >> Now that is just a mean test. > >> > > >> > > >> > No, the mean part is when the instructor is talking to you and grabs > >> >the steering wheel to cause a skid to see how you handle it. > >> > >> Right hands flies off steering wheel and smacks instructor across the > >> chops. > >> > >> Then smoothly recover from skid unencumbered ;-) > > > > > > And spend the next 30 to 90 days in the stockade for striking a > >government employee? :( > > Geeee, ossifer, it was an accident ;-) The nightstick across your skull would be the next 'accident'. :( -- Offworld checks no longer accepted!
From: JosephKK on 21 Dec 2009 22:45 On Fri, 18 Dec 2009 01:08:15 -0800, Fred Abse <excretatauris(a)invalid.invalid> wrote: >On Sun, 13 Dec 2009 09:58:48 -0800, JosephKK wrote: > >> Instek, Rigol, and Hameg are ODM for Agilent, Tek, and Phillips(?); not >> necessarily in that order. > >Hameg belongs to Rohde & Schwarz Thanks. Another fine instrument maker feeling the pinch.
From: DaveC on 22 Dec 2009 16:47 > Hi all, > > I think I'm going to try and treat myself to an oscilloscope this > Christmas. I've managed to go without one for the last 15 years or so and, > frankly, did not have a burning need or even much space for it. I do some > digital design (PIC based mostly) - LED, motor controls and such and > every once in a while I wish I has something to look at the signal with. > > So, I've looked around and saw this name come up often: Rigol DS1102E > 100MHz Digital Storage Oscilloscope. There is also a 50MHz version which > is what I think I need. There has not been any need for me to look at > 100MHz signals in a long time. I am not at all proficient with > oscilloscopes and have never used a digital one. Last one I used had a > round green screen :) which hints at how long ago that was... So flat(er) > learning curve would be important for me. > > Are there people here using this brand? Are they any good for use in > digital designs and, most importantly for me at this point, easy to learn? > > I guess, Rigol may not be the only ones making digital oscilloscopes these > days. What other brands/models should I also look at? > > Thanks for your suggestions! Suggest for your modest needs a used Tektronix from your local Craigslist.org advert site (a good thing if you live in a large city) or e-Pain if you are good at that kind of long-distance evaluation of a product for auction (I'm not...). Good luck, Dave
From: DaveC on 22 Dec 2009 16:47
> Just an FYI on Tektronix; > they are planning to move production from Beaverton,Oregon to China. > > More US jobs lost. [...] > On their website is the notice about moving production. Jim, A URL to that notice? Danaher don't have a search function and Google turned up nada. thanks! |