On 5/27/06, Vasile Surducan <piclist9@gmail.com> wrote:
> On 5/25/06, Olin Lathrop <olin_piclist@embedinc.com> wrote:
> > Vasile Surducan wrote:
> > >> I don't know since it has never been broken out. The parts we are using
> > >> that are only for WiFi are pretty much just the compact flash
> > >> connector and
> > >> the compact flash WiFi card.
> > >
> > > Yes, but this means the RF project belongs to someone else,
> >
> > Exactly!  Getting all those details right and properly certified by
> > regulatory agencies is a *major* job.  The volumes of compact flash Wifi
> > cards are high enough that you can get them for a very reasonable markup
> > over production cost.  You really really don't want to try designing your
> > own just to have WiFi connectivity in a bigger product.
> >
> > > you have
> > > no control on that side and you depend from those RF design, BER, SNR,
> > > etc, etc, etc.
> >
> > Right.  Someone else has already invented the wheel, designed a product
> > around it, dealt with the wheel police, and is producing them in volume at a
> > good price.  Since my end product just uses wheels to get a bigger job done,
> > it would be really silly to try and design and produce my own.
> >
> > > As long you've change the RF part you must made changes in your
> > > project too, including firmeare because there are many differences in
> > > RF desighns even the connector is the same.
> >
> > I'm not quite sure what you are saying, but we are working with CF cards
> > that all use the same popular chipset.
>
>
> Intercept the RF with an atenna. Connect the antenna with a spectrum analyzer
> (a real one not those made by PCMCIA WIFI card + a software program).
> Change the CF WIMAX card

WIFI (not yet WIMAX)

and see what you'll see.
> It's the same CF card, the same 802.11 standard and the way of flowing packs
> are completely different, the SNR (or SFDR) is different, the EVM is
> different and the efect you may see is just one: this CF works, the
> other CF works too but
> slowly, and closer to the router...
>
> Vasile
>
>
> >
> > > And again I don't think you're able to use the entire bandwith
> > > (54Mbps) that 802.11 a/g recommend.
> >
> > No, and I don't want to.  The overall datarate of this product is something
> > a PIC can handle.  The reason for WiFi is easier and cheaper installation.
> >
> >
> > ******************************************************************
> > Embed Inc, Littleton Massachusetts, (978) 742-9014.  #1 PIC
> > consultant in 2004 program year.  http://www.embedinc.com/products
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>

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