Re: [SI-LIST] : connector substitution for high speed signals

Adrian Shiner (adrian.shiner@virgin.net)
Mon, 07 Jun 1999 21:26:32 +0100

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Realistically, I doubt that you will get the relevant information from
the manufacturer(s) in order to compare.

Some parameters which affect RF performance:-

Dielectric constant and losses of material between conductors
Spacing of conductors (variable through connector)
Diameter or other geometry of individual conductors (variable through
connector)
Material of connector conductors
Contact resistance
Proximity and effectiveness of shielding
Impedance matching to input and output

Good luck & feedback would be nice!

Adrian

John Lin (=AAL=B4=C2=B7=D7) wrote:

>
>
> Hi All SI Experts,
>
> One question.
>
> If I want to use one connector to replace another connector because of
> cost issue, what criteria are needed to prove they are electrically
> equivalent.
>
> Especially the substitution is happened for high speed / low swing
> signals, such as RAMBUS signals, which have 200ps for rising time.
>
> Any comments or suggestions are appreciated.
>
> Thank you for helps in advance.
>
>
> John Lin
> Quanta Computer Inc.
> CAE Engineer
> Tel: 1+886+03+3979000 ext. 5183
> Fax: 1+886+03+3975000
> Email: John@quantatw.com

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Realistically, I doubt that you will get the relevant information from the manufacturer(s) in order to compare.

Some parameters which affect RF performance:-

Dielectric constant and losses of material between conductors
Spacing of conductors (variable through connector)
Diameter or other geometry of individual conductors (variable through connector)
Material of connector conductors
Contact resistance
Proximity and effectiveness of shielding
Impedance matching to input and output
 

Good luck & feedback would be nice!

Adrian
 
 

John Lin (ªL´Â·×) wrote:

 

Hi All SI Experts,

One question.

If I want to use one connector to replace another connector because of cost issue, what criteria are needed to prove they are electrically equivalent.

Especially the substitution is happened for high speed / low swing signals, such as RAMBUS signals, which have 200ps for rising time.

Any comments or suggestions are appreciated.

Thank you for helps in advance.
 

John Lin
Quanta Computer Inc.
CAE Engineer
Tel: 1+886+03+3979000 ext. 5183
Fax: 1+886+03+3975000
Email: John@quantatw.com

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