All:
First of all, is this the correct list to ask this question? If it is not,
please direct me to the correct list.
Here's the real question:
Background
I have a new tower to install. There is no equipment on the
tower yet.
The tower is 1000 ft tall, buy I will be mounting equipment at
200 ft.
There is a 100 ft bridge from the base of the tower into the
head end where my cabinet is located.
200 ft + 100 ft = 300 ft
I will mount 6 x ePMP 1000 on 3 x KP Performance antennas.
I have a CMM4 to mount on the tower as well. The CMM4 will provide timing
and power to the 6 x ePMP 1000's.
I have a 1500 kva UPS in my cabinet in the Tower headend that I want to use
to provide back up power to the CMM4 and the 6 x ePMP 1000s.
Questions
What should my power supply solution be for the CMM4? It came
with a 120 VAC to -56 VDC power supply, but
I am flirting with the distance limitation of 330 ft for the
Ethernet, so I will just run fiber up the tower to the CMM4 and solve that
problem, but what about my power? How do I size the wire, whould I try to
push -56 VDC power up the tower or am I better trying to get 120 VAC up the
tower? If I get 120 VAC up the tower, how can I put that on my UPS? Any
ideas on my wire gauges?
Thanks in advance!
Lorell Hathcock
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