Can a retail wireless LAN "reach" 300 ft?

Can a retail wireless LAN "reach" 300 ft?



Steve

In article <xomdnWKlzpxl2SCiRVn-(E-Mail Removed)>,
Steve Forrester <(E-Mail Removed)> wrote:
:Can a retail wireless LAN "reach" 300 ft?

Indoor or outdoor?

Does "retail" include retail directional antennae?

Does 300 ft include line-of-sight ?


If you have line of sight outside you could probably do it with
retail equipment.
--
Disobey all self-referential sentences!

Outdoor

Does "retail" include retail directional antennae? If necessary.

Does 300 ft include line-of-sight? 2 Degrees off-center of line of sight

In article <xLednRxmT7lh6iCiRVn-(E-Mail Removed)>,
Steve Forrester <(E-Mail Removed)> wrote:
:Outdoor

oes 300 ft include line-of-sight? 2 Degrees off-center of line of sight

I'm having trouble interpreting that 2 degrees bit? There's an
obstruction that covers 2 degrees of the field at the point of the
obstruction?? There's a very small obstruction whose radio shadow
covers 2 degrees of the field of a reasonble-sized antenna? The place
you have to mount the transmitter is physically constrained and the best
you could do would be to point 2 degrees away from line of sight?
Something else?

It's hard to get radio waves to bend without a magnetic field
[or a gravity field ;-) ], so if there is an obstruction in the way
then the radio pretty much has to go through the obstruction. The
difficulty of that depends on the kind of obstruction. Someone went
into a bit of an explanation fairly recently of the variations that
"tree" could provide.
--
Usenet is one of those "Good News/Bad News" comedy routines.

Sorry... the corner of a building lies in my line of sight. if you were to
draw a line from transmitter to corner and one from corner to laptop the
obtuse angle would be 176 degrees; i.e., 180-2x2.

--
Steve

"Walter Roberson" <(E-Mail Removed)> wrote in message
news:bpk01a$enk$(E-Mail Removed)...
> In article <xLednRxmT7lh6iCiRVn-(E-Mail Removed)>,
> Steve Forrester <(E-Mail Removed)> wrote:
> :Outdoor
>
> oes 300 ft include line-of-sight? 2 Degrees off-center of line of sight
>
> I'm having trouble interpreting that 2 degrees bit? There's an
> obstruction that covers 2 degrees of the field at the point of the
> obstruction?? There's a very small obstruction whose radio shadow
> covers 2 degrees of the field of a reasonble-sized antenna? The place
> you have to mount the transmitter is physically constrained and the best
> you could do would be to point 2 degrees away from line of sight?
> Something else?
>
> It's hard to get radio waves to bend without a magnetic field
> [or a gravity field ;-) ], so if there is an obstruction in the way
> then the radio pretty much has to go through the obstruction. The
> difficulty of that depends on the kind of obstruction. Someone went
> into a bit of an explanation fairly recently of the variations that
> "tree" could provide.
> --
> Usenet is one of those "Good News/Bad News" comedy routines.

In article <Td-dnYgr9uZUgyOiRVn-(E-Mail Removed)>,
Steve Forrester <(E-Mail Removed)> wrote:
:Sorry... the corner of a building lies in my line of sight. if you were to
:draw a line from transmitter to corner and one from corner to laptop the
btuse angle would be 176 degrees; i.e., 180-2x2.

Would it be possible for you to mount a reflector on the corner of
that building? Would it be possible for you to put a tower on
the building you are in so that the line-of-sight angle goes over
the blocking building?

Is the blocking building really almost exactly half-way between
you and the laptop? If not, then although it might be 2 degrees
from you to the corner, it wouldn't be 2 degrees from the
corner to the laptop.

Any idea what kind of materils the blocking corner would be made
out of? It is possible that the material that lies within the
line of sight is not of the same construction as the building
generally. The infrastructure for a steel-reinforced concrete building
is on the interior, with a decorative shell sometimes being placed
overtop. Going through a dried-wood marquee is not going to have the
same effect as going through an concrete pillar or a metal sign.

We can give you guidance about what to look for, but with an
obstruction in place ultimately you're just going to have to try it and
see what happens. Start with the transmitter in place and start with
the laptop just in the line of sight and see if you can get a
connection; then start moving the laptop behind the obstruction and
watch the signal fall.

Another possibility would be to place a reflector on an object
that is in the field of view of both locations -- perhaps on a building
across the road from the obstruction.

Reflectance does strange things. Sometimes, in the waiting area of
the lobby inside our building, I can pick up an outside signal
that must be coming in the windows of the offices nearby and bouncing
off the interior office wall towards the waiting area. I usually
can't get that signal at the same strength until I get to the edge
of the property, a couple of hundred feet away... and even there a bit
of movement loses the signal again, suggesting that even there it is
bouncing off a nearby building. I do not know where it is really
coming from.
--
This signature intentionally left... Oh, darn!

On Fri, 21 Nov 2003, Walter Roberson wrote:
> In article <xLednRxmT7lh6iCiRVn-(E-Mail Removed)>,
> Steve Forrester <(E-Mail Removed)> wrote:
> :Outdoor
>
> oes 300 ft include line-of-sight? 2 Degrees off-center of line of sight
>
> I'm having trouble interpreting that 2 degrees bit? There's an
> obstruction that covers 2 degrees of the field at the point of the
> obstruction?? There's a very small obstruction whose radio shadow
> covers 2 degrees of the field of a reasonble-sized antenna? The place
> you have to mount the transmitter is physically constrained and the best
> you could do would be to point 2 degrees away from line of sight?
> Something else?
>
> It's hard to get radio waves to bend without a magnetic field
> [or a gravity field ;-) ], so if there is an obstruction in the way
> then the radio pretty much has to go through the obstruction. The
> difficulty of that depends on the kind of obstruction. Someone went
> into a bit of an explanation fairly recently of the variations that
> "tree" could provide.

But you DO have a gravity field - it's just a very weak one! :-)