[WISPA] [isp-wireless] FM radio station site strangeness

Sun Jan 11 17:05:54 CST 2009

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: <eje at wisp-router.com>
To: "WISPA General List" <wireless at wispa.org>
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" <ooe at odessaoffice.com>
>
> Date: Sat, 10 Jan 2009 09:14:44
> To: WISPA General List<wireless at wispa.org>
> 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: <os10rules at gmail.com>
> To: "WISPA General List" <wireless at wispa.org>
> 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" <ispwireless-list1 at wirelessconnections.net>
> To: <isp-wireless at isp-wireless.com>
> 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
> mikec at wirelessconnections.net
> www.wirelessconnections.net
>
> -----Original Message-----
> From: Marlon K. Schafer [mailto:ooe at odessaoffice.com]
> Sent: Wednesday, January 07, 2009 10:47 AM
> To: isp-wireless at isp-wireless.com
> Cc: isp-wireless at isp-wireless.com
> Subject: [isp-wireless] FM radio station site strangeness
>
> Hi All,
>
> I think we finally have this all figured out.  Now I just have to
> figure out
>
> how to fix it.
>
>
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