Re: oscilloscope for CNC

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Harvey White <madyn@i...> wrote:

> On Sat, 28 Jun 2003 09:30:47 -0000, you wrote:
>
> >Hi everyone,
> >
> >I have a bit of extra money and am considering upgrading my digital
> >meter to an oscilloscope :-)
> >
> >Anyone has any suggestion for the features I should look for, and
> >perhaps even the model? I have been using steppers to date, and will
> >likely upgrade :-) to servo or pseudo-servo later.
>
> dual channels, triggered sweep (a/b delayed is best). On screen
> readout is a plus, but expensive. Minimum of 50 mhz bandwidth, 100 or
> more is preferred.
>
> Much depends on what you plan to use it for. Microprocessor work
> needs more bandwidth and more channels. Television/audio repair is
> generally fine as is.
>
> Tektronix is good, Hewlett Packard is good, but there's an odd logic
> to the design. Kenwood (!) is also good, the CS series scopes can be
> available.
>
> I would consider a Tektronix 2000 series if you want portable, a
> Tektronix 7000 series if you want mainframe and plugins, and perhaps a
> 5000 series Tektronix if you want something that was further down the
> food chain and less money.
>
> Stay clear of the tektronix 500 series, they are almost all vacuum
> tube monstrosities from the '60s and '70s. You will probably not be
> able to find tubes nor parts easily, and they will attempt to heat a
> large automotive garage in use.

There are a lot of Mil surplus USM-281's kicking around, The Tek and
HP are good scopes, but some of the others I'd stay away from
Expecially Dumont (USM-281E). They are not a good scope also stay away
from the Tektronixs T series scopes.
Bill Higdon

> I'd recommend getting none of these new. Roughly what area are you
> in? Simply because there are some resources in the Atlanta, Ga. area
> that sell good oscilloscopes (he might even ship). You are talking
> about 300 or so before shipping for a tektronix 2000 series, which
> meets the minimum specs I laid out above. They are used. You might
> also try the larger hamfests, which listings can be found at
> www.arrl.org there's a hamfest link on their page.
>
> If you want small and cute, try www.allelectronics.com for a single
> channel digital hand held scope. Runs off batteries, 10 mhz, 2
> memories, one channel. It should be under the test equipment category
> if they still have it. Roughly 160, or so, IIRC, It's a 10 Mhz scope
> made by Velleman. I wouldn't recommend it for a primary scope, but
> then again, I'm picky.
>
> Feel free to email me off list with more information, if you wish.
>
> Harvey
>
>
> >
> >Thanks
> >
> >Tanya
> >
> >