That's all fine and good, but I pointed out that the contractor tied
their heliax to our conduit all the way up. That was about the dumbest
possible thing they could've done. There's cable hanger bars that are
about 3 feet wide and we're all the way to one side with our conduit.
That's just fucking lazy.
On 6/7/2017 11:31 PM, Brian Webster wrote:
The problem with this attitude to the fix, you as the WISP are now an
unintentional radiator interfering with a licensed service. This will
get you a visit from the FCC and you will be at fault no matter what.
Because you have equipment that is unintentionally radiating in
licensed spectrum, based on all FCC rules you lose and you get fined.
This would be the case even if you had no RF equipment on the site.
That is why gear has certifications for emissions for class a and b
computing devices to assure they do not radiate any unintentional RF
signals. Once you install any equipment like that outside the
parameters the gear was certified under, you become liable for the fines.
As mentioned by others fix the problem, if they call the FCC you will
be screwed plain and simple.
The school is not SOL because of your gear, you are. You are an
unlicensed system radiating on their frequencies…… it is your
responsibility to eliminate that interference as soon as you are
notified and it is shown to be your equipment causing the problem.
Thank You,
Brian Webster
www.wirelessmapping.com <http://www.wirelessmapping.com>
www.Broadband-Mapping.com
*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *George Skorup
*Sent:* Wednesday, June 07, 2017 7:56 PM
*To:* af@afmug.com
*Subject:* Re: [AFMUG] Interference on a repeater at 149 MHz
We have a local school district co-located with us on a water tower
and they're complaining about noise on their input. I pretty much told
them they're SOL until we need to add or replace cables since they're
all in an 1-1/4" PVC. So we'll have to run temp cables up, rip all the
cables out of the pipe and pull new ones. The village said we have to
be in conduit. And we do have a couple cables in use that aren't
shielded. They didn't offer to pay for it, so too bad.
They're running a Kenwood repeater in an outdoor cabinet. Maybe 12U.
Obviously that's not going to fit the proper large can cavity duplexer
like a Sinclair. Plus they have >4.5MHz split, so no doubt that let
them use a smaller rack-mounted duplexer.
So I'd be curious to know what the setup is on this 149MHz repeater.
Are they using a small crappy duplexer with a large split, too?
On 6/7/2017 5:55 PM, Lewis Bergman wrote:
I don't think so. I am assuming they probably didn't install some
connectors correctly. Unless they are using some extremely crappy
gear the RF portions of all half decent repeaters are shielded
very well. Unless they modified the repeater leaving some
shielding off the connectors are the most likely source. I guess
there could also be punctures or some such in the coax as well.
On Wed, Jun 7, 2017 at 5:51 PM Jaime Solorza
<losguyswirel...@gmail.com <mailto:losguyswirel...@gmail.com>> wrote:
Lewis. You are assuming the VHF gear was properly
installed...few folks do right first time... someones laziness
or lack of knowledge is another's opportunity to make some cash
On Jun 7, 2017 4:41 PM, "Lewis Bergman"
<lewis.berg...@gmail.com <mailto:lewis.berg...@gmail.com>> wrote:
Has anyone checked their connectors/connections between all RF
points? Antenna to cable, cable to duplexer, duplexer TX/RX to
repeater.
Most of the time I have seen Two Way equipment either be
interfered with or interfere with someone else it is a
connector issue. The only other case I have seen issues should
be able to be determined by an intermod study. I doubt it has
anything to do with intermod. My bet is a faulty connector. I
would assume it is the RX side so I would check the RX
Repeater port to the RX port on the duplexer and then the rest
of the connectors.
Not saying it can't be the the CAT5, just that if all is good
on the antenna system I haven't ever seen an issue and I have
a lot of sites with both two way and 900, 2.4, and 5GHz
operating on all kinds of speeds both POE and not.
