My guess was #1. Interesting enough, I have several HighGain Omni units <
http://www.l-com.com/productfamily.aspx?id=6414> that work really well. They
dont have the drain hole on the bottom (I had one fill up with water once).
At any rate, I have two water towers within a 1/10th of a mile on each side
of a  ridge. Each side feeds locatins that cant see the other water tank.
So, both have omnis and I'm wondering if it would help to mount one of the
omnis upside down and get some diversity. ?


On Wed, Jan 27, 2010 at 5:30 PM, Bob Moldashel <[email protected]> wrote:

> A couple of reasons....
>
> 1.  Antenna mounting space reuse. Standoffs have antennas facing up but
> not down. Allows the use of multiple antennas on one mount.
>
> 2. Omni antenna designs that will provide more saturation and downtilt
> when inverted as an omni has natural "uptilt" when mounted normally.
> You will usually find cell sites (usually old Nextel Sites) where the
> omni's are mounted inverted to better saturate a local area.
>
> NOTE:  The antennas are specially made to be inverted.  Do not try this
> with something off the shelf.  Most omnis have vent holes to drain
> moisture. Invert them and you will loose this ability in most cases.
>
> -B-
>
>
> RickG wrote:
> > While traveling around, I've noticed a few towers with omnis mounted
> upside
> > down with a neighbor omni mounted right side up. Whats the purpose in
> this?
> > -RickG
> >
> >
> >
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