[SI-LIST] Re: PCB Material clarifications
- From: "Moreira, Jose-Antonio" <jose.moreira@xxxxxxxxxx>
- To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 16 Mar 2012 09:42:36 +0000
Hello Karthik
This kind of comparison cannot be done on the time domain using parameters like
jitter and Eye height (there are too many variables on those type of
measurements). You need to do it in the frequency domain using a VNA.
Also, you need to make sure the trace width on all experiments is exactly the
same to make sure the skin-effect loss is the same (adjusting the stackup of
course to have the same impedance on all experiments).
Jose
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of karthikeyavelan.kandasamy@xxxxxxxxx
Sent: Friday, March 16, 2012 10:31 AM
To: weirsi@xxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: PCB Material clarifications
No, but we are meeting the Impedance is same (85 ohms)
Regards
Karthik
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of steve weir
Sent: Friday, March 16, 2012 1:31 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: PCB Material clarifications
Have you EXACTLY matched the dielectric thickness for each scenario?
Steve.
On 3/16/2012 12:47 AM, karthikeyavelan.kandasamy@xxxxxxxxx wrote:
> Hi Experts,
> We have done the simulation with different materials ( 1. Isola 2. Megtron 3.
> Isola& megtron (mixed)) and results are below.
>
> Here we are seeing the eye height of mixed material(isola and Megtron)
> is more than Megtron Our expectation is Megtron should be more compared to
> other materials.
>
> Could you please comment on this.
>
> Isola Material result:
> Eye height : 68mv
> Eye width: 32ps
>
> Megtron Material result:
> Eye height : 72mv
> Eye width: 34ps
>
> Isola and Megtron Material result:
> Eye height : 78mv
> Eye width: 34ps
>
> Thanks in advance.
>
> Regards
> Karthik
>
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