Re: Oscilloscope Shopping on a $2000.00 Budget

On a sunny day (Sat, 06 Oct 2007 16:14:26 -0700) it happened D from BC
<myrealaddress@xxxxxxxxx> wrote in
<5f5gg3tttlqi4go2qtmpjsml5nslt3kkt6@xxxxxxx>:

On Sat, 06 Oct 2007 19:16:18 -0500, Spehro Pefhany
<speffSNIP@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

On Sat, 06 Oct 2007 21:22:36 GMT, the renowned Jan Panteltje
<pNaonStpealmtje@xxxxxxxxx> wrote:

On a sunny day (Sat, 06 Oct 2007 20:12:33 GMT) it happened D from BC
<myrealaddress@xxxxxxxxx> wrote in
<3gqfg359lb9va92fe236m147nfqgvuk9ge@xxxxxxx>:

I guess stay away from the Nagafoogitzosushi scopes :)


D from BC

With a 200$ budget, and time on your hands, how about designing and building your own.

$2000 CAD budget, he said (= USD 2015 = EUR 1436). That's enough to
buy a decent scope.


As others mentioned you perhaps want a logic analyser for the uc too.
Le's see:

Grab one LCD (color?) display.
Grab a fast large FPGA
FPGA has enough I/O pins for analyser and LCD, memory interface.
Grab the free Altera or Xilinx soft.
Grab a very fast AD, with some very fast SRAM.
The fast FPGA may have already a processor.
Now input attenuator, some buttons, simple power supply,
and perhaps the most expensive the case.
Some connectors.
Some input protection.
Anybody have any design ideas?

How about the trigger circuitry? I think that might be the challenge,
and a quite difficult one without proper test equipment. ;-)



Best regards,
Spehro Pefhany

It's one of those circular things...
Like the time I needed a hammer to fix my only broken hammer.

One needs a good scope to make a good scope. :(
Oh wait..I'd believe this more...
One needs an excellent scope to make a good scope..

No, if that was so then there would be nothing ever.
the digital part can be 100% simulated anyways, and the analog part too.
A few tricks you must have aquired yourself over time.
If it displays a 50MHz square wave from some chip output, without shoots and
stuff, you are getting closer to something you could use for power
suplies and normal uc I think?


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