Re: TDR instrument with regulable risetime.

[Larry Aamodt]

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Possible solution:  An HP 54750A series sampling scope combined with
a PicoSecond Pulse Labs fast generator and a set of pulse shaping
filters that will allow selection of rise time (I don't have their
catalog right here and it has been a while since I looked, so I don't
recall the available risetime selections.  They can likely make you
what ever you need).

Contact:  Jim Andrews
          PicoSecond Pulse Labs
          P.O. Box 44
          Boulder, CO  80306
          (303) 443-1249
          www.picosecond.com

Larry Aamodt
Walla Walla College
aamola@wwc.edu

> 
> I am seeking a TDR  instrument with regulable risetime, covering a range as
> large as possible.
> 
> Has anyone in this list ever used, or heard of, something like this?
> 
> I am familiar with a TDR instrument operating at a fast rise time, <200 pS.
> I have also heard of instruments with
> faster rise times, <10 pS.  I am seeking an instrument with a regulable
> risetime, covering a range as
> large as possible, perhaps from 10 to 200 pS.  But I have been unable to
> find any information about this.
> I have emailed some companies:
> Soilmoisture
> Campbell Scientific Inc.
> Tektronix
> E.S.I. Environmental Sensors Inc.
> but I have only received negative answers.
> 
> I will be grateful for any information on this matter.
> 
> Elimoel A. Elias
> e-mail: elias@imagenet.com.br
> Website:  http://elimoel.freeyellow.com/elimoel.html
> ICQ 109845414
> Tel.: +55-19-432-9458