[SI-LIST] Re: PCIe Oscilloscope

Steve most of the PC USB scopes I have seen have pretty low bandwidths 
and/or sampling rates that tend to top out around 200MHz and 200Msps.  
The software has gotten steadily better, and they usually have the 
advantage of comparatively deep memories.   If you are only looking at 
repetitive signals, some of them will do ERTS to get equivalent sample 
rates up to a few Gsps.  Otherwise don't expect real time analog b/w 
over 100MHz.  If you really need 200MHz I would get one of the current 
generation Tek or Agilent scopes that are quite compact and really go up 
to 1GHz.  They pack very nicely into Pelican rolling luggage and have 
USB interfaces for control and capture from your laptop.

Steve
Steven Kan wrote:
> Heh. I thought he was asking about a PC-based 'scope :)
>
> On that note, does anyone here have experience with USB-based oscilloscopes? 
> I am looking for something to use for customer demos of our systems, and 
> would prefer not to have to lug a full-fledged scope around. Luggage is a 
> step-function, and right now I'm very nearly full.
>
> I need only two channels + trigger, and really need only about ~200 MHz 
> analog bw. 50 Ohm termination would be nice, but I can get by with an inline 
> terminator if I need to. I don't need much in the way of features and 
> smarts; I just need to display waveforms without horrible lag.
>
> I've read various reviews for PC-based 'scopes, but I'd like some feedback 
> from real engineers who have actually used any of these.
>
> Any recommendations or contra-recommendations? Thanks!
> --
> Steven Kan                             (p) 310-515-5330 x24
> Pulse Instruments                          (f) 310-515-0068
> 1234 Francisco St., Torrance, CA  90502    (c) 818-620-3062
> mailto:steven@xxxxxxxxxxxxxxxxxxxx
> http://www.pulseinstruments.com
> See our new Data Acquisition system! 
>
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