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[Karlnet] Using Karnet in a -48v enviroment

To: "Karlnet Mailing List" <karlnet@WISPNotes.com>
Subject: [Karlnet] Using Karnet in a -48v enviroment
From: "Phillip Britt" <phil@team.wideband.net.au>
Reply-to: Karlnet Mailing List <karlnet@WISPNotes.com>
Date: Tue, 30 Nov 2004 07:51:02 +1100
List-post: <mailto:karlnet@WISPNotes.com>
Hi All,

We have recently commissioned a new site with licensed microwave gear for 
backhaul.  All this sort of gear and our routers use -48v  ie, the neutral & 
earth is positive.

We plugged in a KN-205 board off our power supply without the antenna attached 
and it worked fine.  Once the antenna as connected the board went dead (no 
lights) and will now not function again.

Does anyone have any suggestions in what l can do here.  I have been 
considering changing the polarity of the 48v being feed into the KN-205 via poe 
in case it was a polarity miss match.

Thanks,
Phil
_____________________________
Phillip Britt
Managing Director
Wideband Networks Pty Ltd

Phone:  03 5135 6888
Fax:    03 5134 1177
Mobile: 0418 528 521


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