FreeLists / si-list / [SI-LIST] Re: Low Load Probe Suggestions

[olaney@xxxxxxxx]

For input capacitance that low, you need a FET probe like the Tek P6245. 
Do your homework at the Tek and Agilent websites and I'm sure you'll find
what you want.

Orin
 
On Wed, 12 Sep 2007 10:09:33 -0700 "Mark Randol" <Mark.Randol@xxxxxxxxxx>
writes:
> I realize this is like asking gear heads what motor oil they prefer, 
> but
> for low loading what probes do you prefer?  I know what I've used, 
> but
> just wondering what else might be available.
> 
> I'd prefer <1pF capacitance and at least 100kohm resistance.  
> Bandwidth
> up to at least 500MHz, preferably into GHz.  Low frequency should 
> push
> towards 10kHz.  Tip voltages typically <5V, almost always <15V.  
> Some
> wiggle room is allowed in the 'specs'.
> 
> Regards,
> --
> Mark Randol, RF Evaluation & Application Engineer
> ON Semiconductor
> 901 S. Mopac Expressway
> Barton Oaks 4, Suite 343
> Austin, TX 78746
> 512-329-5640 (voice), 512-329-8151 (FAX)
> =20
> =20
> 
> > -----Original Message-----
> > From: si-list-bounce@xxxxxxxxxxxxx=20
> > [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Doug Smith
> > Sent: Wednesday, September 12, 2007 1:30 AM
> > To: emc-pstc; SI-List
> > Subject: [SI-LIST] Fluorescent light noise
> >=20
> > Hi Everyone,
> >=20
> > For years the electronic fluorescent light over the table I=20
> > do many of my experiments has been putting "fuzz" in some=20
> > scope measurements. So, I decided to measure what was going=20
> > on. This month's Technical Tidbit on my site is:
> >=20
> > Abstract: Electronic fluorescent lights are capable of=20
> > generating significant EMI. The nature of the EMI resulting=20
> > from internal switching used by such a light is presented.=20
> > The amplitudes measured are significant and could affect high=20
> > impedance analog circuits.
> >=20
> > The results are surprising in the amplitude observed at 48=20
> > kHz. Go to http://emcesd.com .  The picture of the scope=20
> > probe and fluorescent light is the link to the article.
> >=20
> > Doug
> > --
> > -------------------------------------------------------
> >      ___          _       Doug Smith
> >       \          / )      P.O. Box 1457
> >        =3D=3D=3D=3D=3D=3D=3D=3D=3D          Los Gatos, CA 
> 95031-1457
> >     _ / \     / \ _       TEL/FAX: 408-356-4186/358-3799
> >   /  /\  \ ] /  /\  \     Mobile:  408-858-4528
> > |  q-----( )  |  o  |    Email:   doug@xxxxxxxxxx
> >   \ _ /    ]    \ _ /     Website: http://www.dsmith.org
> > -------------------------------------------------------
> >=20
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> 
 
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