[SI-LIST] Re: Verifying parts of the channel Simulation
- From: V S <for_si2003@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx, "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- Date: Wed, 11 Feb 2009 12:57:02 -0800 (PST)
Taking the BGA out should not be a difficult task to do in any good assembly
shop.
You may also like to purchase one IRDA BGA rework station - some simple one
should not be expensive ( on ebay it is about $200 or so). The IRDA rework
station sends Infra Red to heat the BGA. A feedback temperature sensor ensure
heating to the required temperature. You can use a simple vacuum pick up tool
to lift the BGA when it is hot. Some machines come with automatic removal
ability. Heating gun is a crude method and should be avoided( but I have used
it).
It is also possible to resolder it back, but needs some skill. I hope you do
not need that. You can take help of assembly shop for that.
Vikas Shukla
http://referencedesigner.com
--- On Wed, 2/11/09, Havermann, Gert <Gert.Havermann@xxxxxxxxxxx> wrote:
> From: Havermann, Gert <Gert.Havermann@xxxxxxxxxxx>
> Subject: [SI-LIST] Verifying parts of the channel Simulation
> To: si-list@xxxxxxxxxxxxx
> Date: Wednesday, February 11, 2009, 10:33 AM
> Hi All,
>
> I have to set up a full channel simulation model for
> optimization purposes. What I did in the past was to
> simulate each part of the channel (traces, connectors,
> footprints...) and then I measured every single part to
> verify the quality of the simulation model. If every part is
> ok, I combine them in a circuit simulator. This works great
> for measurement channels, meaning an SMA-to-SMA type of
> channel (acsessible end points).
>
> Now I have to do the same for an existing Rack mount high
> speed backplane based system (one that I didn't design).
> My big problem is, that I can not access the endpoints,
> because of the BGAs that are soldered to the board, thus
> I'm not sure how to measure the modules to verify the
> simulation.
>
> Does anyone have good ideas?
>
> I was already thinking about taking the BGA of the PCB and
> measure with probes, but I don't hav e good rework
> station to do so.
>
> Mit freundlichen Grüßen / Kind regards.
>
> Gert Havermann
> Signal Integrity Engineer
>
> > SI & CAE
> > HARTING Electronics GmbH & Co. KG
> > Marienwerderstraße 3
> > D-32339 Espelkamp
> >
> > Phone +49 5772 47 857
> > Fax +49 5772 47 179
> > mailto:gert.havermann@xxxxxxxxxxx
> > http://www.HARTING.com
> >
> >
> >
> >
>
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