DB222 lower dipole horizontal ?
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DB222 lower dipole horizontal ?
I went out to a new customer site and noticed that the top dipole was vertical and the bottom dipole was horizontal on the DB222. Was it installed this way for a purpose or is it damaged? The tower is about 30 feet tall and it is to cover just a factory site with several buildings. Portable radios are used. The repeater is 10 watts and seems to work OK.
Last edited by arlojanis on Sun Dec 02, 2012 11:32 am, edited 1 time in total.
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Re: DB222 lower diopole horizontal ?
arlojanis wrote:I went out to a new customer site and noticed that the top diopole was vertical and the bottom diopole was horizontal on the DB222. Was it installed this way for a purpose or is it damaged? The tower is about 30 feet tall and it is to cover just a factory site with several buildings. Portable radios are used. The repeater is 10 watts and seems to work OK.
Sounds like someone had a freeze brain moment from a frosty. Have never seen that before and would expect it to really mess up the antenna pattern.
How did they ever manage to flip the dipole horizontal. The normal mountings that I have seen won't allow for it.
Jim
Re: DB222 lower diopole horizontal ?
ew! High band in a factory. No chances for receiver noise problems there. I imagine someone MacGuivered the lower element to horiz trying to achieve what broadcasters get with their rams horn arrays - a non-polar multiphasic pattern to overcome multipath issues and have better null fill so close to the antenna on property. As long as it sweeps good, and isn't noisy, I'd leave it.
Re: DB222 lower dipole horizontal ?
Bill: Sounds about right, I remember how our cell sites back in the day used an inverted collinear at the site as a null fill for close in locations near roadways, so the mobile users did not drop out from poor near field reception.
But I concur, the mount isn't what is standard from the factory, but if it works as needed, I too, would leave it alone, beside, it might anger the pencil pusher that mounted it that way.
Almost like those gang banger movies where the thug holds the autoloader sideways because it looks 'cooler', but a piss poor sight picture. Same mentality.
Being near field in highband, I doubt moving it back to factory would change any characteristics in receive or transmit, except at the far end of the building possibly.
But I concur, the mount isn't what is standard from the factory, but if it works as needed, I too, would leave it alone, beside, it might anger the pencil pusher that mounted it that way.
Almost like those gang banger movies where the thug holds the autoloader sideways because it looks 'cooler', but a piss poor sight picture. Same mentality.
Being near field in highband, I doubt moving it back to factory would change any characteristics in receive or transmit, except at the far end of the building possibly.