Subject: Re: oscilloscope for CNC

I've had suprisingly good results using my digital camera to record
glitches, it does help that I have a viewing hood, but one can easily
be made from cardboard.

IMO a 'scope is all but useless to the non electronic fraternity,
obtaining a stable viewable trace on signals other than from a signal
generator requires a fair amount of expertise; interpreting the
results is another matter altogether. Also as most waveforms need to
either be viewed, or triggered, in relation to other signals there is
a real danger of getting the wrong ground wires connected and then
expensive blue smoke.

My 2c

Bernard

> Tanya
>
> If it is analogue signals, you need a bandwidth of about 5 times

your max frequency you want to measure. Digital signals you need
about 2 times unless you want to do glitch capture. Something that
can do a waveform capture is always good. Personally I prefer
HP/Agilent, but I have a Tektronix scope DSP360 ($4000) . The FLUKE
Scopemeter series is not to bad if you want portable and rugged. Stay
away from anything less than 50 Mhz. Look on Ebay, there is normally
a lot of units available.

>
> Stephan
>
>
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