Others have responded with some sane (and good) advice - you will have
too much cable loss and the cable will be expensive/hard to work with in
a conduit.
I have done a point-to-point installation with close to 250' of coax (up
a tower), but placed an amplifier at 100' to compensate for the cable
loss. It was easier to climb to 100' for servicing the amp than placing
the AP at the 230' level with the antenna. I hate using amplifiers (I
don't recommend their use), but needed to in this situation.
In your situation, it would be better to extend the data via fiber or
copper (cat5/6) and mount the AP in a NEMA enclosure. I like the idea
of using fiber as it gives you lightning protection from your network
gear. If you are using copper, I'd definitely recommend a lightning
arrestor on the cat5/6. I'd also recommend a lightning arrestor on the
antenna connection to the AP.
Other points to look at -
- You may need a heater and/or fan(s) to keep the temperature in the
enclosure within the operating temperature of the AP.
- As mentioned above, lighting protection should be used on any outdoor
installation. even a 12" fiber jumper works as great lighting protection.
- Power either locally or use PoE (if you are using copper). I've seen
some installations that even use solar cells and batteries for local
power. Remember that if you use PoE, you will need lighting arrestors
that support PoE on the cat5/6.
>>-> Stan Brooks - CWNA/CWSP
Emory University
Network Communications Division
404.727.0226
[EMAIL PROTECTED]
AIM: WLANstan Yahoo!: WLANstan MSN: [EMAIL PROTECTED]
-------- Original Message --------
From: Lee Weers
Date: 5/19/2006 11:41 AM
We have a situation in which we need to cover our baseball and softball
fields wirelessly. There is currently no infrastructure there. What we
are looking to do is put a high gain antenna on the football stadiums
scoreboard. There is a conduit that we can run some coax through out to
the scoreboard. My question is this:
1. Can you extend an antenna from an AP 250 ft? (That's how long it is
to the scoreboard)
2. What kind of coax do we need to use to do a/b/g?
We would like to mount the ap inside of the building and then just
extend the external antenna to the scoreboard.
Thank you,
Lee Weers
Assistant Director for Network Services
Central College IT Services
(641) 628-7675
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