🚀 go-pugleaf

Sakari Aaltonen (sakaria@vipunen.hut.fi) wrote:
: I'm thinking of buying an oscilloscope. I wonder if anyone would care
: to offer suggestions as to what I should look at? Maker? Type?
: 
: Two channels should suffice, but I really don't know about bandwidth.
: I'm mostly interested in digital signals, so the usual entry-level 20MHz
: is probably too small. Let's say 25ns pulses should be at least visible -
: would 40 MHz be enough? Or is it rise time that matters?
: 
: Thanks in advance,
: -- 
: --------------------------------------------------------------------------
: Sakari Aaltonen                              Email: sakaria@vipunen.hut.fi
: "... implementing hardware interrupts in a PC peripheral interface is like
: falling off a log."              Horowitz and Hill, The Art of Electronics


You probably want to buy a scope that has a single shot capability of no
less than 50 Mhz.  You will be better off with a digital storage scope that
allows you to capture the waveform, pan along a stored image, change the
timescale of a scaled image and do advanced triggering.  Do NOT consider a
high frequency scope that has a bad single shot figure, you will be 
disapointed.  If you are interested in looking at rise/fall time/undershoot/etc
than the higher the better.  I work for HP so I am only exposed to our stuff.



Consider this:

                    HP 54504A     HP 54505B      HP 54506B
-repetive           400 Mhz         300 MHz        300 MHz
-singe shot			 50 Mhz         125 Mhz        125 MHz
-channels             2               2              4
-price				$6750 US        $8350 US      $13990 US

I have taken this info out of HP's 1993 Catalog. I do not quarantee it's
correctness.

Good luck, Brad Siim