Hytera PD70X Series, Руководство по планированию систем

Страница: 52 / 182

Hytera DMR System Planner
48
account before setting the RSSI threshold. Generally, the following four site
configurations are available for your reference.
2.7.2.1 Overlapping coverage
This scheme is designed for a large city or an area where a large population is
present. It involves a number of sites and much overlapping coverage. In the
overlapped areas, multiple frequencies are used, while the non-overlapped areas
share frequencies, but different color codes are required for roaming service. In
some cases, a user may be within coverage of three to four sites at the same time,
and it takes about 10 minutes to move from one site to another.
TX=F1
RX=F2
CC=4
TX=F5
RX=F6
CC=2
TX=F1
RX=F2
CC=1
TX=F3
RX=F4
CC=3
TX=F1
RX=F2
CC=4
TX=F5
RX=F6
CC=2
TX=F1
RX=F2
CC=1
TX=F3
RX=F4
CC=3
Figure 2.7.2.1-1 ： Overlapping Coverage
2.7.2.2 Non-overlapping coverage
This scheme is designed for the countryside or a single part of a small city. It
involves multiple separate sites and no overlapping coverage is present. The
non-overlapped areas share frequencies, but different color codes are required for
roaming service. With this scheme, a user may be within coverage of one site at the
same time, and it takes several hours to move from one site to another.