For a simple setup like Steve's dual ODU, I'd probably cheat and do
something like a 4 or 5A fuse at the bottom, assuming about 80W per
radio. Plus they're on the same antenna, height, power supply, bonded
together, etc. For the single run scenario anyway. If it was dedicated
runs, then yeah, each would get their own fuse/breaker/whatever.
Are you talking the new Nova 436's? If it was me, I'd do a dedicated run
to the ground for each. Just because. Future and stuff. 8x8 eNBs
probably aren't too far off in the future. Gonna need more power.
But after a quick re-read, I assume you're talking the Nova 230. Say a
cluster of 4. Perfect scenario for a SM Base-II, 5ch PDU and a small
switch up top. What I would do, in case the switch locks up, is use the
cat6 in the bundle as ethernet and either primary or secondary power to
the base unit. i.e. use the blue and brown pairs for pwr1 or pwr2.
The thing that sucks with the Traco BCMU360 is that it's regulated 48
and you can't crank up the output voltage to 56VDC. The only thing the
pot does is adjust the battery voltage.
I remember Forrest was talking about doing a multi-port media converter
injector thingamajig. That would be cool, but now I think we're getting
to the point where the vendors are paying attention, so hopefully
bitching about DC+fiber is going to be a thing of the past.
On 12/18/2017 8:37 AM, Josh Baird wrote:
In this scenario - would you fuse each DC run from the small
top-enclosure (where your power/fiber breaks out) to the radio(s)?
I'm looking at doing something similar to power some Baicells eNBs.
TSP/BCM at the bottom, 14AWG DC/fiber up the tower to a small
enclosure where the power/fiber will break out to the eNB's and a switch.
What would you put at the bottom between the 48VDC rail and the run to
the top? A breaker? A large-ish fuse?
Josh
On Fri, Dec 15, 2017 at 2:48 PM, George Skorup
<[email protected] <mailto:[email protected]>> wrote:
Get the Shireen DFP-1246. That has a red and a black 12AWG. And 4x
single-mode fibers. You could do even one single run of that and
4x BiDi optics. Or a run for each radio if you're stuck with
duplex optics. The reel is 500', so I would just do two dedicated
runs. Bring it up to a small enclosure. Terminal strip or whatever
for your power. LC-LC couplers or a patch panel. Flexible conduit
from the radios to the enclosure. Use standard patch cables inside
from the radio to the coupler/patch panel.
Have your guy splice on some LC pigtails. Or go to FS.com and get
some mechanical LC connectors. As short as the run is, I would not
be concerned with mechanical connectors. This is single mode, so
you're going to have plenty optical budget.
That's my 2c anyway.
On 12/15/2017 10:52 AM, Steve Jones wrote:
We are putting our first fiber to the radio, I have no clue
the components. It appears this link will have 4 LC connectors
on single fiber.
Theres a conduit kit for the radio, looks like 2 to each radio
in 2+0 if im understanding correctly. I figure we will need an
enclosure at the top for these to enter to let the fiber pairs
split out.
The two big questions are
Can I get this cable in pre terminated patch cords affordably
and just cut the jacket back to get the pairs to the radios.
If its preterminated without running big pipe, conduit is kind
of out so is just something copper clad similar to BBDGE
recommended?
Neither of these are more than 120 feet
Our guy can splice at 70 bucks per, but im not sure how viable
that is in the air (these are grain elevators though)
Both these radios have existing cat5 BBDGE, can I use that to
run about 105 watts @ 48volts split out to two radios at 120 feet?
Im pretty excited to not have ethernet negotiation issues or
surges
