Installation Manual Part 3

PRELIMINARY
6-20
BWX 8415 Basestation Installation and Commissioning Guide
OL-19519-01
Chapter 6 Installation
6.4 Power and Ground Cabling
Figure 6-20 Magnetic Declination Chart – Example
Note It is better to convert the “true” azimuth (which way the antenna should point in the horizontal plane) as
required by the RF Plan to the magnetic value that will be read on the compass before sending the
installer to the field. This way the installer will go by the reading on the compass, not having to worry
about magnetic declination corrections.
6.4 Power and Ground Cabling
6.4.1 Overview
The BS will operate at an input voltage of - 48 V DC, as measured at the input terminals to the BS.
General power and grounding information was covered in Chapter 5, “Pre-installation.” Please refer
there for information about power and ground cabling.
6.4.2 System Ground Cabling
The BS must be grounded prior to connecting power.
Warning This equipment must be externally grounded using the supplied ground wire before power is applied.
Contact the appropriate electrical inspection authority or an electrician if you are uncertain that
suitable grounding is available. Statement 366
 Use a compass to determine the magnetic East
 Use a Magnetic Declination chart to correct the compass reading
and determine the true geographic East
World Magnetic Declination Chart - Year 2000
Unit:Degrees
World Magnetic Declination Chart - Year 2000
Unit:Degrees