FreeLists / si-list / [SI-LIST] Re: A question for the instrument guys on TDR and TDT

["Chris Cheng" <Chris.Cheng@xxxxxxxxxxxx>]

I would agree. However, the question is not whether the scope is capable =
of doing it but why not ?  The controls are almost there (for the =
TDR/TDT) and de-embedding is a simple step of shifting the reference =
plane or simple post processing FIR filter (something advance sampling =
scope can already do). A $40K+ VNA vs. a free firmware upgrade on the =
sample scope. Which one will you choose !?

-----Original Message-----
From: Istvan Novak [mailto:istvan.novak@xxxxxxxxxxx]
Sent: Monday, November 06, 2006 5:31 PM
To: Chris Cheng
Cc: si-list@xxxxxxxxxxxxx
Subject: Re: [SI-LIST] A question for the instrument guys on TDR and TDT


Chris,

The answer is yes (as long as the network is 'sufficiently' linear). =20
The finite rise time
shows up as filtering, what happens in all simulations or measurements=20
anyway,
even if we neglect the effect of risetime.  If you need the impedance of =

a power
distribution network, the quantization of the receiving instrument will=20
set the noise floor.

Regards,

Istvan Novak
SUN Microsystems

Chris Cheng wrote:

>I can understand the merit of a step response and direct read out of =
=3D
>impedance profile.
>Will it be easy to also include a mode with a sharp pulse instead of =
=3D
>step for an impulse response ? If you have a circuit to generate a 35ps =
=3D
>step, can you use it to generate a 35ps pulse also ? I think there are =
=3D
>steps you can do to convert one to the other but a direct impulse =3D
>response is just too good to pass up.
>Network analyzer on the cheap.
>Thanks in advanced,
>Chris
>
>
> =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:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://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