User Manual

August 6, 2003 Part 004071A revision 00b 29
Chapter 2: Site Preparation
Electrical Requirements
Before you begin installing the NPM basestation, read the following
requirements. Ensure that each requirement is met before proceeding with the
installation and consult your MOPs for procedures concerning power,
grounding, and high-risk cut-over activities.
Main Power
The NPM basestation requires a +24V DC power supply. See your field
engineering package (FEP) for the recommended settings of your power supply.
The minimum DC input voltage at the PDP is 22.6V; the maximum DC input
voltage at the PDP is 29.2V. The input power noise level should not exceed a
maximum of 100 mV peak-to-peak, DC to 20 MHz.
NOTE: The minimum gauge for the wires connecting the
basestation to the main power source is #2 AWG. The maximum
loop length of #2 AWG wire is 19.8 m (65 feet). #2 AWG wire that
is less than this length will not be damaged or overheat in the
event of a current overload or short-circuit condition.
Table 2.8 shows the power consumption for the different configurations of the
MMDS basestation when receiving +28V DC at the PDP.
NOTE: Each RFSS module draws 16.1A at +28V DC.
!
WARNING: Failure to meet the following requirements may result in
personal injury and cause damage to or destruction of the NPM basestation
and surrounding equipment.
Configuration Radio Rack (A) RF Rack (A) Total (A) Total (W)
6 sectors 79.8 201.6 281.4 7035
3 sectors 48.8 105 153.8 3845
1 sectors 28.2 40.6 68.8 1720
Table 2.8 Power Consumption Values
installation.book Page 29 Wednesday, August 6, 2003 6:06 PM