Re: 900 MHz waverider & ISP problems

On 15 Jul 2005 10:22:52 -0700, "nurp" <nurp@xxxxxxxxxxx> wrote:

>The base station is probably no more than 100' and I am around 60'.

I guess that's the altitude. Could I trouble you for the distance?

>I am using a yagi antenna, not sure about the gain (maybe 14 db)

How many elements and I'll calculate the gain.

>...the
>cable is between 50' or 60'.

Ouch. Might be very lossy that long. What type of cable? If
unavailable, measure the diameter.

>The tallest tree I have by me is probably around 60' & I should be well
>under 3 miles away.
>There are no buildings, hill or mountians in the path just a large
>amount of trees, maybe about the size of several city blocks or so.

That's not too horrible. However, I have no idea how big is a city
block. I live in a rural area. Can we do this in calculateable units
of measure, please?

Don't forget that wireless requires more than an optical line of
sight. The Fresnel zone is considerably wider at midpoint at 900MHz
than optical. That can be calculated once you supply the missing
distance. If the Fresnel zone hits the ground, you're in trouble.

>I might already have the lat/long and I guess I can take a drive this
>weekend.

With the exact lat-long, I can use a program called "Radio-Mobile" to
plot the path profile. Your Waverider dealer should also be capeable
of calculating the fade margin and doing a path profile.

>Thanks for your help.

--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831.336.2558 voice http://www.LearnByDestroying.com
# jeffl@xxxxxxxxxxxxxxxxxxxxxx
# jeffl@xxxxxxxxxx AE6KS
.

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