Nortel Networks 411-2021-111 manual Power and Grounding Requirements

Power and Grounding Requirements 5-3

Table 5-1

Metrocell DC Power performance requirements

Description		Requirements
	Maximum		Nominal	Minimum
Module or unit level operating voltage range	29.00 Vdc		27.00 Vdc	21.00 Vdc
Metro RF Frame current draw per feed (A or B) with all PAs	75 Adc
transmitting at full RF output power
Metro RF Frame power distribution voltage drop (from the	0.65 Vdc
feed input at the RIP to any module)
Metro RF Frame power distribution resistance (from the	40
feed input at the RIP to any module)	MOhms
Metro RF Frame operating voltage range (measured at the	29.00 Vdc		27.00 Vdc	21.60 Vdc
RIP power feed input)
Metro RF Frame minimum voltage to guarantee maximum				26.20 Vdc
PA RF power is available (measured at the RIP power feed
input)
Power Plant normal operating "Float" voltage range	27.60 Vdc		27.25 Vdc	27.00 Vdc
Power Plant "Equalize" voltage (one to two days)	29.00 Vdc
Power Plant voltage drop	0.25 Vdc
Maximum power feed length (measured from Metro RF
Frame RIP to Power Plant breaker
#2/0 AWG or Welding Copper Wire	60 feet
#1/0 AWG or Welding Copper Wire	47 feet
Absolute maximum voltage (no damage, non-operational,	30.50 Vdc
applied continuously)
Transient voltage immunity (Metro RF Frame modules) for	40 Vdc
300 ∝s
Noise from battery (system and module immunity)
into 600 Ohms	56 dBmC
from 10 kHz to 20 MHz in 3 kHz BW into 50 Ohms	100 mV
	(rms)
from dc to 100 MHz into Hi-Z	250 mV
	(p-p)
Noise to battery (system and module emissions)
from 300 Hz to 10 kHz (where Ip is the steady state	9+10logIp
dc current draw)	dBmC
from 10 kHz to 1 MHz	Ip**0.5 mV
	(rms)
Broadband noise	250 mV
	(p-p)
Battery step (system and module immunity) within nominal	±3 Vdc
operating range with 1 V/ms maximum rate of change)
DMS-MTX DualMode Metrocell Cell Site Description