[SI-LIST] Re: TDR Resolution
- From: "Schoen, Kipp" <kschoen@xxxxxxxxxxxxxx>
- To: <mmoeller@xxxxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 17 Jan 2005 09:57:15 -0700
Merrick,
The typical rule of thumb used to estimate the minimum resolution of a =
TDR signal is:
resolution length =3D (risetime * speed of light) / (2 * SQRT[epsilon =
effective])
However, you should keep in mind that shorter single discontinuities =
than this will show up with a slower TDR, but they will be somewhat =
smaller bumps with slower risetime signals. This rule of thumb is good =
for determining how close two discontinuities may be placed together and =
still be resolved as separate features. Some background information on =
TDR and resolution is given in a technical paper entitled, =
"High-Resolution TDR Measurements Using the PSPL Model 4020 and Model =
4022 9 ps TDR Source Enhancement Modules."
It may be found at =
http://www.picosecond.com/objects/4020_high_res_TDR.pdf
Hope this information helps.
regards,
Kipp Schoen
Picosecond Pulse Labs
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Moeller, Merrick
Sent: Monday, January 17, 2005 9:22 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] TDR Resolution
Experts,
I am in the process of running a simulation=20
In order to resolve signal path discontinuities. Is there a
Rule of thumb that would give the minimum rise time signal
To resolve a min length discontinuity?
Regards,
Merrick
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=20
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