The business whose parking lot we are in, bought the house where our
tower was. Left the tower alone, tore down the house and put up a
store. We provide them fiber from the pole and link to our other
subscribers with wireless links. It's not a good relationship, they'd
rather be on our provider fiber circuits than us. They could be F'n us,
I'm just not finding the source for proof. There's still issues I'm
seeing with the radios that's puzzling.
For one, the AP was originally a link just for one customer, so we used
a litebeam m5 at both ends. It was in auto, the link was easy to
install and it was all we had for choices at the time. Well, the house
next door to #1 wanted internet, so another m5 got used, then later
another neighbor customer got added. So now we have 3 customers off a
litebeam m5 used as an AP. Everything seemed to be fine for a couple
months and then we had a big storm and the power went out for a couple
days. Then we noticed the food truck, the low capacity for traffic and
are attempting to find out what's going on.
After asking our provider to check their part of the system, they denied
anything wrong with it (expected)(nothings ever wrong, right). The
service has improved, just not as good as it used to be.
On 1/9/23 15:29, Chuck McCown via AF wrote:
Maybe they are causing enough voltage drop to noise up your power
supplies.
Have you checked the AC voltage?
*From:* Jan-GAMs
*Sent:* Monday, January 9, 2023 3:50 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] backup power for small tower
We are already using shielded ethernet cable. The truck is parked
about 40ft from the pole with two heavy guage extension cords plugged
into outlets at the base of the pole and about a 90 degree angle from
the beam direction of one radio and 180 degrees from the other radio,
They would have to be purposefully jamming with higher power from
inside the truck. Of course these are ubiquiti plastic radios, not
metal housings.
I'm trying to get my hands on some line-conditioners to see if that
will make a difference.
On 1/9/23 08:37, Forrest Christian (List Account) wrote:
I'm suggesting on the AC line if that's where the noise is coming from.
My guess is one of two things:
1) somehow the truck is generating rf noise. For example they have a
mobile Hotspot or signal booster or something like that. Or some
other non obvious source.
2) the truck is generating noise on the electrical system. Check
for bad grounds, apply filtering, and so on. Changing the shielding
arrangement on the cat5 cable might help. That is add/remove
shield, try
connecting/grounding the shield on both ends or just the top, or
just the bottom. And try grounding the shield without connecting it
to the radio.
The question here is where is the noise coming from. One way to
isolate the power as an option is to try running off a generator.
Or have the truck run off the generator.
On Mon, Jan 9, 2023, 9:06 AM Josh Luthman
<j...@imaginenetworksllc.com> wrote:
I had a 0% success rate with ferrite.
I have a 100% success rate with fiber (up the tower).
On Mon, Jan 9, 2023 at 10:57 AM Forrest Christian (List Account)
<li...@packetflux.com> wrote:
Agreed. And if it's on the ethernet side, just adding some
ferrite chokes to the power line might fix the problem. Or
switching to shielded cable.
On Mon, Jan 9, 2023, 7:52 AM Josh Luthman
<j...@imaginenetworksllc.com> wrote:
Step 1 is to figure out where your packet loss is coming
from. If it's interference on the RF side, changing to a
DC plant is a complete waste of time/money.
On Mon, Jan 9, 2023 at 9:21 AM <dmmoff...@gmail.com> wrote:
Usually when people say "DC plant" they mean a
rectifier. A charger + inverter like you proposed
would probably also count as having DC power plant.
I used one of these once:
https://www.aimscorp.net/12-Volt-Pure-Sine-Inverter-Chargers/
Worked fine, but no remote management. I'm sure there
are a dozen options out there to pick from.
An isolation transformer might be a less intrusive
change. Tripp Lite makes some affordable ones. On
the trip lite ones I had the hot and neutral were
isolated, but the ground passed straight through.
Depending on where the noise is coming from that
might not fix it, but you can test an isolated ground
by snapping off the ground prong on the transformer
or using a 2-prong adapter. I say "test" because you
shouldn't run without a ground permanently.
-----Original Message-----
From: AF <af-boun...@af.afmug.com> On Behalf Of Jan-GAMs
Sent: Sunday, January 08, 2023 3:41 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] backup power for small tower
It's in a parking-lot of a business and they started
plugging their food truck into the power-source. So
what do you mean by "DC plant"?
On 1/8/23 12:20, Bill Prince wrote:
> If your site is 100% DC-powered, the batteries
should provide all the
> isolation you need. My suggestion is to just switch
to DC plant.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 1/8/2023 11:21 AM, Jan-GAMs wrote:
>> Ever since a food truck started plugging their
truck into the same
>> power source we use we've been experiencing severe
packet loss
>> through it. Possibly electrical motor-hum?
Anyway, I'm wondering
>> what is available or suggested to use to place a
better electrical
>> isolation for a battery backup in the box on the
tower.
>>
>> We're using two ubiquiti radios one cheap ubiquiti
router and a Cisco
>> fiber to ether-net router. We have a cyberpower
450va that provides
>> power for less than an hour when we have a power
outage. It would be
>> better if we could use something more hefty. The
NEMA box is 2ft x
>> 2ft x 8in. Inside is 2ft x 2ft x 6in. So there
isn't much room.
>>
>> I'm thinking maybe a stack of batteries, a charger
and a sine-wave
>> invertor? Unless someone knows of a product that
would do what's
>> needed?
>>
>>
>
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