[SI-LIST] Re: What is a good method to test the impedance of a PDS?

Hi, Kelvin,

Impedance analyzer can be used to test input impedance at certain port of a 
PCB/PCA if the equipment can cover the frequency range you are interested. You 
can also calculate the input impedance by perform 1-port or 2-port S-parameter 
measurement using network analyzer. Same for measuring transfer impedance on 
PCB/PCA.

You may find this paper helpful if you decide to use S-parameter to calculate 
PCB/PCA impedance.


" An Experimental procedure for Characterizing Interconnects to the DC power 
Bus on a Multi-layer Printer Circuit Board"  Hao Shi, Fei Sha, James L 
Drewniak, Thomas P Van Doren and Todd Hubing



Catherine Xu
__________________________________
Lead HW Design Engineer, Ph.D
HP ICS  CHIL - San Diego
(858)655-4023
__________________________________ 

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On 
Behalf Of kelvin.harding@xxxxxxxxxxxxxxx
Sent: Monday, November 22, 2010 2:52 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] What is a good method to test the impedance of a PDS?

How should I test the impedance of:
1) Bare PCB
2) Populated PCB.
What test equipment is required?

How do I calculate the acceptable parameters for the design?

If this is too general then please point me to relevant reading.

Regards,

Kelvin
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