Billie Erin Walsh wrote:
Koenraad Lelong wrote:
Thanks for those suggestions, but besides some cell-phones (not near
laptor or accesspoint) we don't have any wireless (radio) devices, and
the microwave oven is meters away and inactive at most of the times of
my tests.
I'll look at the burst rate and give it a try.
I tried at least five different locations in the house but except for
one these were on or in open wooden closets, next to a wall. The other
one was on the table max. 1 meter away from my laptop. I'll try on a
different table farther away.
How high is your router/access point located?
In our computer room we had the router on a cabinet up right at the
ceiling. Getting a connection on our laptop on a TV tray right below it
was nearly impossible. Move to the other room and it connected just
fine. Lowered the router and end of problem.
Just a thought.
Every now and then, I have read a few of the responses on this
discussion. I just have a few comments. You definitely do not want two
wireless devices communicating on the same channel too close together.
Even nearby channels can cause the transmitter to overload the receiver
circuit. While the symptom is data distortion, we are talking about a
potential damage to the receiver circuit. Good receivers would simply
shunt the signal to prevent damage.
With low power devices, antennas become extremely important. At the
frequency of wireless devices, polarization can make a several db
difference in signal strength. In other words, all antennas should be
horizontal or vertical. Vertical orientation usually give the best
horizontal coverage, but will have blind spots of the ends of the
antenna. Just think of a doughnut being placed over the antenna. You can
then easily visualize the radiation pattern.
I personally miss the PCMCIA cards that allowed the antenna to be
vertically polarized. To overcome this shortcoming, I wrap the cardboard
core of a toilet paper role with tinfoil, and set stand it next to the
wifi antenna. It does give a small signal boost, because the tube is
almost a perfect 1/4 wave length antenna. If I really want distance, I
use a wireless card that has an external antenna. There are some really
cool external antennas that provide significant signal gain.
Just in case you are wondering, I am an amateur radio operator. Playing
with radio signals is second nature.
Bill Anderson
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