[SI-LIST] Re: gigabit port

Dear Myan,

In addition to jozefs recommendations, I would suggest, you check the
components used - I mean the capacitors, termination resistors etc. A
capacitor with dielectric characteristics suitable for filtering at low=

frequencies may not filter well at higher clock frequencies. Just for
capacitors' availability sake, design engineers may select a cap that i=
s
inappropriate for their circuit. So at higher speeds, network component=
s
must meet stringent tolerances as recommended.
Higher clock speed which is always accompanied by a shortening of signa=
l
rise time also can increase the number of error packets.
A small layout change on account of EMI considerations also can cause
these, where a circuit could behave totally unpredictable at high speed=
s.

To put it short there can be multitudes of reasons starting from compon=
ents
to  routing to layer stacking.

Your question "And I want to know if Pulse transformer 5054 is for
10/100/1000 base-T" is not quite clear.
Try hitting the internet with the proper manufacturing part number.

Regards
Sreeja

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                      .cn>                     To:       <si-list@freel=
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                      Sent by:                 cc:                     =
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                      si-list-bounce@fr        Subject:  [SI-LIST] giga=
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                      11/23/2004 07:06                                 =
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                      PM                                               =
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                      Please respond to                                =
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                      myan                                             =
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  I design a board . There are 6 Gigabit ports (1000base-T) on it. And =
=3D
there is no problem to send packets to smartbits . But when smartbit =3D=

sends packets to these Gigabit ports, there are a lot of error packets =
=3D
received by these ports . Could anyone give me some help ?  =3D20

 And I want to know if Pulse transformer 5054 is for 10/100/1000 base-T=
 =3D
? =3D20
    =3D20
 Thanks!

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