Sorry for digging up the old thread, hopefully it will help someone in
the future looking through the archives
We put on a Far-Rite #2643626002
https://www.fair-rite.com/product/round-cable-emi-suppression-cores-2643626002/
core on every Ethernet cable. Just looped the Belden 7919a cable,
jacket and all, through as many times as we could (~8-10) Haven't had
any Ethernet issues for a month. We have them on the cable ends closer
to the radios, usually within about 2' of the radio. Rockets have
stayed at 100mb and EPMP at 1G.
On 7/23/2018 10:29 AM, Dave wrote:
We are co-lo'd with a 5K transmitter and similar run but we finally
went with Superior essex rigid copper shield cable
and used the faraday method of grounding. It was easy since the
pmp450i came along we just had to make sure the rj45
was just long enough to connect with the metal grommet have the outer
jacket inside it.
Did this a year or 2 ago and no problems since. We also have surge
boxes inline as well. where before we could not even think of adding
them due to the cable interference. The CMM5 has helped a bunch in
keeping a flawless connection.
On 07/20/2018 11:31 AM, Nate Burke wrote:
It looks like the old archives aren't back online yet, so I couldn't
go searching through there for ideas.
I have a site where we have been co-locating with a 800w FM
Transmitter for years. We've always had Ethernet problems at the
site since the FM went in. Everything is shielded cat5 (Belden
7919). It is at a grain elevator, our equipment is on one corner of
the platform, and the FM Transmitter is on the other corner. We are
horizontally separated by about 10 feet. There is no way to get
vertical separation. I used to run all the cables down to the bottom
of the leg, about 100'. In an effort to make the Ethernet work
better, I installed an Edgepoint fed with Fiber at the top, so cable
lengths between the radios and the Edgepoint are now 5'-10'. With the
FM Transmitter turned off, everything runs perfectly. When the FM is
turned on, most equipment drops to 100mb, and some goes down to
10mb. On the most problematic equipment, I have installed the 4 pair
FM Filters from Sandman http://www.sandman.com/rf.html within 12" of
both the switch and the radio. It made no change.
What FM Elimination tricks have I forgotten to try? I was really
expecting the short cable lengths to solve the problem.
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