User's Manual

Appendix A - Antenna Configurations Antenna Down-Tilt Guidelines
4Motion 687 System Manual
A.3 Antenna Down-Tilt Guidelines
Antennas may support mechanical down tilt (MDT), electrical down tilt (EDT) and
remote electrical tilt (RET). Typical adjustment ranges for MDT and EDT are 0 to
-10 degrees.
As a ground rule it is recommended to minimize the usage of MDT, preferring EDT
instead.
The degree of tilt to be used is highly dependant on sector configuration and
specific environment considerations and conditions. It also depends on network
rollout stage - in the initial stage, when not many sites are deployed in a specific
area, a certain tilt is be applied to maximize the coverage footprint of the existing
sites, and at a later stage, when more sites are built, the degree of tilt per sector
may be increased to control the inter-site interference.
Table A-1 shows typical numbers provided only as a reference for initial site
deployment.
Table A-1: Typical EDT Values
Environment EDT (degrees)
Dense urban 6
Urban 6
Suburban 4
Rural 2