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Power and Grounding Requirements
5-3
DMS-MTX DualMode Metrocell Cell Site Description
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
transmitting at full RF output power
75 Adc
Metro RF Frame power distribution voltage drop (from the
feed input at the RIP to any module)
0.65 Vdc
Metro RF Frame power distribution resistance (from the
feed input at the RIP to any module)
40
MOhms
Metro RF Frame operating voltage range (measured at the
RIP power feed input)
29.00 Vdc 27.00 Vdc 21.60 Vdc
Metro RF Frame minimum voltage to guarantee maximum
PA RF power is available (measured at the RIP power feed
input)
26.20 Vdc
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
#1/0 AWG or Welding Copper Wire
60 feet
47 feet
Absolute maximum voltage (no damage, non-operational,
applied continuously)
30.50 Vdc
Transient voltage immunity (Metro RF Frame modules) for
300
µ
s
40 Vdc
Noise from battery (system and module immunity)
into 600 Ohms
from 10 kHz to 20 MHz in 3 kHz BW into 50 Ohms
from dc to 100 MHz into Hi-Z
56 dBmC
100 mV
(rms)
250 mV
(p-p)
Noise to battery (system and module emissions)
from 300 Hz to 10 kHz (where Ip is the steady state
dc current draw)
from 10 kHz to 1 MHz
Broadband noise
9+10logIp
dBmC
Ip**0.5 mV
(rms)
250 mV
(p-p)
Battery step (system and module immunity) within nominal
operating range with 1 V/ms maximum rate of change)
±
3 Vdc