Best bet is put all cat5 in shielded liquidtight.

Better bet is run fiber + power up to a switch and a PacketFlux rack
injector

Otherwise you will just end up chasing it all day everyday.


-Sean


On Sat, Apr 20, 2019 at 11:30 AM Matt Hoppes <
[email protected]> wrote:

> I believe there is a spare antenna already connected.  I’ll have to check
> on Monday.
>
> On Apr 20, 2019, at 14:22, <[email protected]> <[email protected]> wrote:
>
> Do they have a spare FM antenna you could connect to a temp line and
> perhaps pull it up the tower while on?
>
> I know I am getting increasingly crazy with ideas here but just
> spitballing.
>
> *From:* Matt Hoppes
> *Sent:* Saturday, April 20, 2019 12:17 PM
> *To:* AnimalFarm Microwave Users Group
> *Subject:* Re: [AFMUG] Fwd: CAT5. FM. And Rain
>
> The Nautel doesn’t ramp. It’s all or nothing.
>
> On Apr 20, 2019, at 13:03, Chuck McCown <[email protected]> wrote:
>
> Would you be allowed to ramp up the RF and see what levels cause what
> kinds of problems?
>
> *From:* Chuck McCown
> *Sent:* Saturday, April 20, 2019 10:47 AM
> *To:* AnimalFarm Microwave Users Group
> *Subject:* Re: [AFMUG] Fwd: CAT5. FM. And Rain
>
> Do you have perhaps a grounding issue at one end or the other?  Most
> ethernet devices have phy transformers that ground directly or through a
> capacitor.  Ground potential differences between one end and the other can
> cause a problem like this.
>
> If you are connected to an earth ground that changes with moisture then
> perhaps a ground loop is causing problems.  This seems backwards but it may
> be ground related somehow.
>
> Fiber
> Spray water
> Liquidtight
>
> I hate to suggest the intermod theory as it seems a bit unlikely to have
> intermod strong enough to interfere with an ethernet signal, but not too
> many things left to think.
>
>
>
> *From:* Matt Hoppes
> *Sent:* Saturday, April 20, 2019 10:41 AM
> *To:* AnimalFarm Microwave Users Group
> *Subject:* Re: [AFMUG] Fwd: CAT5. FM. And Rain
>
> The issue has gotten worse over the last two years. With it be terrible
> right now.
>
> We just reran cable last month. All new cable and radios. And still having
> the issue.
>
> On Apr 20, 2019, at 12:03, Chuck McCown <[email protected]> wrote:
>
> You would have to climb it with a garden sprayer strapped to your back.
> I am more of the opinion of the corroded RJ45.
>
> *From:* Matt Hoppes
> *Sent:* Saturday, April 20, 2019 8:42 AM
> *To:* AnimalFarm Microwave Users Group
> *Subject:* Re: [AFMUG] Fwd: CAT5. FM. And Rain
>
> Not in liquidtight.
>
> Have ground lifted and grounded. No change.
>
> Have not wet things (would be difficult - no ready source of water)
>
> Obviously RF is getting into the Ethernet, when things are wet. I’m just
> trying to figure out why. Clearly a connection is being made somewhere it
> shouldn’t be.
>
>
>
> On Apr 20, 2019, at 09:58, Chuck McCown <[email protected]> wrote:
>
> So moisture + rf = Ethernet interference.  Just as originally stated.  No
> standing waves.
> Is your cat5 in liquidtight?  Have you played with grounding & ungrounding
> the shields?  How about taking a garden sprayer and selectively wetting
> things?
>
> Sent from my iPhone
>
> Begin forwarded message:
>
> *From:* Matt Hoppes <[email protected]>
> *Date:* April 20, 2019 at 7:52:12 AM MDT
> *To:* Chuck McCown <[email protected]>
> *Subject:* *Re: [AFMUG] CAT5. FM. And Rain*
>
> Yes. Problem goes away.
>
> On Apr 20, 2019, at 09:51, Chuck McCown <[email protected]> wrote:
>
>
> Have you killed the ref when you are having the problem?  Might not be ref
> related.
>
>
> Sent from my iPhone
>
>
> On Apr 19, 2019, at 7:11 PM, Matt Hoppes <
> [email protected]> wrote:
>
>
> 19watts
>
>
> On 4/19/19 8:58 PM, Chuck McCown wrote:
>
> What is the reflected power when you are having problems?
>
> Sent from my iPhone
>
> On Apr 19, 2019, at 6:41 PM, Matt Hoppes <
> [email protected]> wrote:
>
>
> My thoughts too. But the reflected power right now is only 19watts out of
> 9,000.
>
>
> On Apr 19, 2019, at 20:14, Chuck McCown <[email protected]> wrote:
>
>
> My guess is that the FM station has a problem with the antenna or
> transmission line.  Moisture throws off impedance somewhere and you have a
> strong standing wave on the transmission line.  Probably a bad connector.
>
>
> Sent from my iPhone
>
>
> On Apr 19, 2019, at 5:52 PM, Matt Hoppes <
> [email protected]> wrote:
>
>
> Looking to the wisdom of the AF group on this.
>
>
> I have some equipment on an FM tower.  It’s a 9kw station around 150ft. We
> are at 250ft with two sectors and a backhaul.  Netonix switch in shelter.
>
>
> Nothing else on the tower.
>
>
> Normally all is fine.   When it rains or is very moist out (heavy heavy
> fog) we start having major Ethernet negotiation issues.   The ports will go
> from 1Gig to 10F sometimes. Sometimes drop completely.
>
>
> I’ve got ferrite beads wrapped about 5 times top and bottom.
>
>
> Any further words of wisdom on what to try?  I suspect some odd grounding
> issue. But not sure how to track it down or isolate it.
>
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