[SI-LIST] Re: AW: Port extension with VNA
- From: jun li <lijun_hit@xxxxxxxxx>
- To: GertHavermann <Gert.Havermann@xxxxxxxxxxx>, si-list@xxxxxxxxxxxxx, Dhamija Naresh-B07930 <B07930@xxxxxxxxxxxxx>
- Date: Thu, 24 Jun 2010 08:34:31 -0700 (PDT)
Sorry for confusing everyone. My purpose here is to talk about port extension
w/ different calibration. not comparing different calibration methods.
ThanksJun
--- On Thu, 6/24/10, Dhamija Naresh-B07930 <B07930@xxxxxxxxxxxxx> wrote:
From: Dhamija Naresh-B07930 <B07930@xxxxxxxxxxxxx>
Subject: RE: [SI-LIST] AW: Port extension with VNA
To: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>, "jun li"
<lijun_hit@xxxxxxxxx>, si-list@xxxxxxxxxxxxx
Date: Thursday, June 24, 2010, 1:46 AM
In case of no test fixture OR No TRL option, I think LRM is better than only
SOLT.
Regards
Naresh
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Havermann, Gert
Sent: Thursday, June 24, 2010 1:22 PM
To: jun li; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] AW: Port extension with VNA
Jun,
both are as accurate as the standards that are used. If you extend the port on
an test fixture, SOLT mostly is less accurate than TRL, because it is very hard
to get the Termination standard right (parasitics and frequency dependence of
the devices and launches). TRL is very accurate when the fixture and standards
are well designed.
BR
Gert
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Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von jun li
Gesendet: Donnerstag, 24. Juni 2010 03:34
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] Port extension with VNA
Hi, allIs it necessary to use SOLT calibration for port extension? In theory,
TRL calibration should work, too. But we got far different value with these two
different calibration method.
ThanksJun
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