Re: My external-antenna experiment on a Linksys wap/router failed!

10 feet of lmr-195 is the prob, try some 400 or have a shorter run.
On Oct 29, 2003, at 7:50 PM, David Cook wrote:

> (Also posted to 'alt.internet.wireless' newsgroup)
>
> Over the last several weeks, I acquired some newer wireless
> equipment, so that I could conduct an experiment using an
> EXTERNAL antenna.  The results were NOT what I
> expected.  Here's the gory details:
>
> I acquired a new Linksys BEFW11S4-V4, and loaded the
> latest firmware into it (firmware v 1.45.7 ).  I also acquired
> a 10-foot LMR-195 connecting cable and a HyperGain 10-dBi
> Omni Antenna.
>
> For a client PC, I used a Win-XP-based laptop, with an
> Orinoco Gold PCMCIA adaptor.  For testing signal strength,
> I ran a copy of v 0.30 of Netstumbler on this laptop.
>
> I carried the laptop a few rooms away from the room with
> the Linksys router and cable-modem in it.  I first left the
> Linksys with its 2 little builtin antennas on it, and using
> Netstumbler, I measured the signal strength so I would
> have a baseline value before I connected the EXTERNAL
> antenna.
>
> I then unscrewed one of the builtin antennas and attached the
> external antenna onto that port.  Using the management HTML-UI
> for the Linksys router, I went into the 'wireless' subsection of
> the setup parameters.  There are FOUR different 'antenna diversity'
> settings:  (1) default (2) right-spread-on (3) left-spread-on (4)
> diversity-spread-on
>
> Not knowing whether 'right' and 'left' meant as viewed from the FRONT
> or REAR of the Linksys-box, I simply set and applied each of the 4
> different diversity settings one-at-a-time, and then took a new
> signal strength measurement for each one.  (I figured that I could
> easily conclude what the correct diversity setting would be
> by simple trial-and-error.)
>
> The results:  I got NO SIGNIFICANT difference in signal strength
> readings among each of the different settings.  And, also NO DIFFERENCE
> between any of those four and the baseline test using just the two
> little builtin antennas.
>
> Well, needless to say, those results are shocking and NOT what I 
> expected!
>
> (I hate to conclude that using an EXTERNAL 10-dBi omni-antenna buys you
> nothing...but that's what my experimental data is saying.)  Somewhere,
> either
> my understanding of the theory or my implementation of the experiment,
> something does not compute!
>
> So, the obvious questions:  Has anyone else ever tried this?
> What might have gone wrong?  Are my expectations that such
> an external antenna OUGHT to make a difference correct?
>
> TIA...
>
>             Dave
>
>
>
>
>
>
>
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