[SI-LIST] Re: TDR Recommendations
- From: "Chris McGrath" <chris.mcgrath@xxxxxxxx>
- To: "SI List" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 12 Nov 2003 12:40:55 -0800
They still sell the 11801C, but our 11801B model was EOL'ed and now the
only service that Tek will perform is calibration. Tek will still
repair and calibrate the SD24 head, although they don't sell those
anymore either. (I have seen them on ebay, though!)
-Chris
> -----Original Message-----
> From: Loyer, Jeff [mailto:jeff.loyer@xxxxxxxxx]=20
> Sent: Wednesday, November 12, 2003 3:11 PM
> To: SI List
> Subject: [SI-LIST] Re: TDR Recommendations
>=20
>=20
> The right place to pursue information on the footswitch is=20
> with your TEK =3D rep. Sorry, but I don't want to set the=20
> precedent of playing TEK rep. =3D Perhaps someone from TEK is=20
> listening in and can address this...
>=20
> Also, I would echo the sentiments of really liking the old=20
> 11801 TEK. =3D But, they're getting obsolete. :-(
>=20
> Jeff Loyer
>=20
>=20
> -----Original Message-----
> From: Loyer, Jeff=3D20
> Sent: Wednesday, November 12, 2003 10:09 AM
> To: 'ray.haynes@xxxxxxxxxxxxxxxx'; SI List
> Subject: RE: [SI-LIST] TDR Recommendations
>=20
>=20
> At the risk of being considered a renegade for addressing a=20
> technical =3D issue in this forum... ;-)
>=20
> I've used the 1st three that you list - they should be=20
> perfectly =3D adequate for what you describe. As far as I=20
> know, the 4th is just a =3D nicer front-end. =3D20
>=20
> One major challenge will be how to probe your signals,=20
> especially since =3D you want to probe differentially (2 signal=20
> and 2 ground contacts =3D simultaneously). It's possible to=20
> position your probes manually for =3D this, but is pretty=20
> demanding. And, if you want to perform differential =3D TDT (4=20
> signal, 4 ground, simultaneously), I would say it's virtually=20
> =3D impossible. Using a probing station (and associated=20
> probes) is nicer, =3D but expensive. And you'll have to spend=20
> energy carefully designing your =3D launch structures to match=20
> your probes. =3D20
>=20
> If you're going the manual route, I'd point out that TEK just=20
> introduced =3D a cheap (<$100, and please don't call me names=20
> for saying that) =3D footswitch for the TDS8000 - IMHO one of=20
> the first great innovations of =3D the 21st century, for=20
> TDR'ers. And, semi-rigid coax works very well for =3D a probe.=20
> I had Microstock make some for me: (Microstock, Inc. =3D=20
> SKRHSO32400-2, 50ohm Probe (.085")).
>=20
> Jeff Loyer
>=20
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx=20
> [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Ray Haynes
> Sent: Tuesday, November 11, 2003 11:22 PM
> To: SI List
> Subject: [SI-LIST] TDR Recommendations
>=20
>=20
> Good day list members,
> I need some guidance. We have just competed a design that=20
> uses 2Gb/s proprietary communication channels to interconnect=20
> boards. I will be getting the artwork on the first board back=20
> soon and I'm going to need to do some SI work on it. These=20
> frequencies are a magnitude higher than anything I have=20
> worked with before. We were very conservative on the layout=20
> but I'm going to want to verify the artwork with a TDR scope.
>=20
> I'm thinking 20GHz bandwidth for the scope and a pulse rise=20
> time should probably be better than 50ps. The signals are=20
> differential so I need that capability in the TDR Head. Does=20
> this sound about right?
>=20
> If my assumptions are correct then are these likely=20
> candidates? Tek 11800 series with SD24 TDR Sampling Head Tek=20
> TDS8000 with 80E04 TDR Sampling Module Agilent 54750 with=20
> 53754A TDR module Agilent 86100 DCA w/ 53754A Differential TDR Module
>=20
> Am I in the ball park? =3D20
>=20
> Ray "Gigahertz Green" Haynes
> Phoenix, AZ
>=20
>=20
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>=20
> or to administer your membership from a web page, go to:=20
> //www.freelists.org/webpage/si-list
>=20
> For help:
>=20
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>=20
> List technical documents are available at:
> http:/www.si-list.org
>=20
> List archives are viewable at: =3D20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages=3D20
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
> =3D20
>=20
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>=20
> or to administer your membership from a web page, go to:=20
> //www.freelists.org/webpage/si-list
>=20
> For help:
>=20
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>=20
> List technical documents are available at:
> http:/www.si-list.org
>=20
> List archives are viewable at: =20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages=20
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
> =20
>=20
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http:/www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
