Hmmm, didn't know that. I installed some of the shielded cables today. We'll know in a couple of days if that does the trick. It's gotten rid of my cat5 testing errors etc. And one test with the Fluke DTX that used to show a high of 3000 now reads 0 or very close to it, just like it should have in the first place.
fingers crossed. marlon ----- Original Message ----- From: <[email protected]> To: "WISPA General List" <[email protected]> Sent: Saturday, January 10, 2009 9:45 AM Subject: Re: [WISPA] [isp-wireless] FM radio station site strangeness > There are fiber cables that comes with built in low voltage wires for poe > applications. > /Eje > Sent via BlackBerry from T-Mobile > > -----Original Message----- > From: "Marlon K. Schafer" <[email protected]> > > Date: Sat, 10 Jan 2009 09:14:44 > To: WISPA General List<[email protected]> > Subject: Re: [WISPA] [isp-wireless] FM radio station site strangeness > > > hmmm, I guess if it comes to that.... > marlon > > ----- Original Message ----- > From: Travis Johnson > To: WISPA General List > Sent: Saturday, January 10, 2009 8:47 AM > Subject: Re: [WISPA] [isp-wireless] FM radio station site strangeness > > > You run both. CAT5 to carry just the power and fiber to carry the data. > We just did this exact thing with our Trango APEX 18ghz radios at our FM > repeater. Worked perfectly. (Of course, that radio was made to handle > fiber already, so it was pretty easy). > > Travis > Microserv > > Marlon K. Schafer wrote: > Yeah. How do you run poe over the fiber? > marlon > > ----- Original Message ----- > From: <[email protected]> > To: "WISPA General List" <[email protected]> > Sent: Friday, January 09, 2009 9:21 AM > Subject: Re: [WISPA] [isp-wireless] FM radio station site strangeness > > > Is using fiber-optic cable out of the question? > > Greg > > On Jan 9, 2009, at 11:28 AM, Marlon K. Schafer wrote: > > Thanks Mike, > > The change to 10 meg half doesn't help. In fact, most devices won't > connect > at all then. > > The worst part is that the most expensive gear is most effected by > this! ug > > I have installed ferrite beads that do indeed help. Apryl can get > you the > contact info and part number. 509.982.2181 > > The shielded cable from Shierene just came in. And I have > permission to > move to the other side of the building. When the snow melts and the > ground > firms up I'll rebuild the entire site. The radio station has a new > transmitter since I first went into the site and another tenant > recently > left. I have more location options now than I did before. > > Yesterday I did some testing with a Fluke DTX. It's a crazy meter. > Checks > just about everything. As it well should for $7000. Know what it > doesn't > check very well though? Inductive RF. grrrrr There is one test that > showed some problems though. It's called an inductive pulse. > Readings at > another tower I have (and the tech support guy at Fluke) were 0. > This tower > had a reading of nearly 3000!!!!! Fluke is supposed to find out > what an > acceptable level would be and send that info to me. I've not heard > from > them yet though. The tech's guess was around 30mV. > > I did think it strange that when I tested my cable with a volt meter > (one > end to ground, the other to the connectors on the cat5) I was > picking up 2 > to 3 volts on each pin. That pretty well seems to line up with the > 3000mV > reading from the fluke! > > This site has always been a source of grief for me. Must less > reliable than > nearly any other I have, no matter what equipment is used. I always > thought > it was due to all of the other operators in the area (one's been > fined by > the FCC for using illegal amps etc.) doing silly things. Though > nothing > THAT bad has ever showed up on my analyzer. I always thought it was > something that only the customer end could see (couldn't find that > on the > analyzer either though). Maybe my problem has always been the radio > station > stuff. Wouldn't that be great? FINALLY, a network reliable enough > to allow > me to take a vacation. grin > > laters, > marlon > > ----- Original Message ----- > From: "Mike Cowan" <[email protected]> > To: <[email protected]> > Sent: Friday, January 09, 2009 1:40 AM > Subject: RE: [isp-wireless] FM radio station site strangeness > > > Hi Marlon, > > It looks like you are on your way to solving this. To get by until > then you > might want to try locking the Ethernet side to 10MB 1/2 duplex. FM > radio > runs around 100mhz at high power levels, well so does a 100MB Ethernet > connection, it communicates at 10mhz. 10MB 1/2 runs at 66mhz I > believe. > Fixing it is really black magic however. Sometimes grounding helps, > sometimes it is better without. Many have placed the cable in > conduit, with > mixed success. I would be very interested if the ferits help, we > have tried > a few with inconclusive results, but have not found a quality unit > to test > with either. > > Mike > > Mike Cowan > Wireless Connections > A Division of ACC > 166 Milan Ave > Norwalk, OH 44857 > 419-660-6100 > 419-706-7348 Cell > 419-668-4077 Fax > [email protected] > www.wirelessconnections.net > > -----Original Message----- > From: Marlon K. Schafer [mailto:[email protected]] > Sent: Wednesday, January 07, 2009 10:47 AM > To: [email protected] > Cc: [email protected] > Subject: [isp-wireless] FM radio station site strangeness > > Hi All, > > I think we finally have this all figured out. 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