The station engineer should be the lead information contact. If he is clueless
most AM stations have engineering firms on retainer.
Adding equipment to certain stations can change the antenna radiation pattern.
Obviously the FCC doesn't lie this. ;-)
-B-
----- Reply message -----
From: "Brian Gray" <[email protected]>
To: <[email protected]>
Subject: [WISPA] Guidance for mounting gear on an AM tower
Date: Wed, Aug 29, 2012 8:43 pm
Besides staying away from an AM tower, does anyone have any guidance as far as
mounting equipment, specifically POE equipment on one without problems for us
or the AM tower?
How do I keep AM RF out of my POE cables and my radios / antennas?
How do I ground my gear?
My initial thoughts are:
Install equipment enclosure at base of tower, attached to tower.Run 1" metallic
liquid tight (MLT) up tower to aluminum enclosure at 200',
continue run from enclosure with 1" MLT up to 300' to additional aluminum
enclosurerun 2 3/4" MLT from 200' enclosure to 2 backhaul radios (probably UBNT
NB25 to start with)run 3 3/4" MLT from 300' enclosure to 3 sector antennas
(probably UBNT Rocket M2)
drill small weep holes in 3/4" runs as they will not be weather tight to
radiosrun shielded cat 5 inside metallic liquid tight.Put 2-3 ferrite cores on
the ends of all of the cables.
install poe surge arrestors on both ends of cables, just before radio and just
before router.wrap rf choke into both ends of a/c power cable running from
enclosure to circuit panelNo clue on grounding this thing.
Thank you in advance!
Brian Gray
Joink LLC
Network Manager812-231-7087 direct
812-870-3332 mobile
Joink Customer Support 1-888-31-JOINK
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