You could try replacing your CAT5 with shielded CAT5 cable and shielded
RJ-45 connectors.

Just my two cents worth....

Ty Carter

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Jenco Wireless
Sent: Saturday, March 31, 2007 1:40 AM
To: WISPA General List
Subject: Re: [WISPA] fm towers

FM kills Ethernet.  Inductors - Period.  Set to 10 Mbps until then.


Brad H





On 3/30/07, Edward J. Hatfield III <[EMAIL PROTECTED]> wrote:
>
> Nearly 40 dB of variations in the link S/N ratio? Holy cat crap,
Batman!
>
>
>
> How accurate is the test equipment yielding that measurement? SNR
> variations
> of 40 dB means four orders of magnitude in signal levels relative to
the
> noise floor, a 10,000:1 change in the power ratio. No wonder the
bloody
> link
> isn't stable!
>
>
>
> Frankly I'm not inclined to trust the accuracy of those measurements
> over-much; it's been my experience that few people own or even have
access
> to the kind of test equipment (like Network Vector Analyzers and Power
> Meters) required to properly trouble shoot microwave systems. But
there
> obviously IS a problem.
>
>
>
> OK, now for the (hopefully) helpful part: My hunch is that the FM
> broadcast
> signal, being in relatively close proximity to your antenna mount, is
> generating harmonics or other spurious energy of sufficient power to
> overload the front end of your radio. (Sharp Q, ultra-deep microwave
> filters
> are expensive and I'd be very surprised if your radio was so
equipped).
>
>
>
> So, the question before you is: How important is this site to your
overall
> network? Is it worth the expense of having a properly trained and
equipped
> microwave field engineer find and characterize the problem, and
suggest
> some
> options for corrective measures?
>
>
>
> Sorry if this sounds a bit harsh but sometimes there aren't any easy
> answers
> to difficult problems .
>
>
>
> Hope this helps, Ted
>
>
>
> Edward J. Hatfield III, President
>
> E.J. Hatfield & Company
>
> 5142 Edgemoor Drive
>
> Norcross, GA  30071-4342  USA
>
> 1-770-209-9236 - Office
>
> 1-770-209-9238 - Fax
>
> 1-770-560-0736 - Sprint
>
> 1-678-457-8411 - Cingular
>
> 154*273*18       - NexTel
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> Sent: Friday, March 30, 2007 4:01 PM
> To: wireless@wispa.org
> Subject: [WISPA] fm towers
>
>
>
> mikrotik 5.8 ptp links off an FM tower. We have a ptp link with a
signal
> to
> noise of 66 to 103. Our access points will only link for a few seconds
and
> quit. we have the exact same links on other towers that work great and
the
> one to this fm tower will not work. any suggestions?
>
> --
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