User's Manual

Table Of Contents
ADAM-2000 Series User Manual 6
1.2.3 Wireless Communication Range
Thought the wireless technology brings the advantage of flexibility, cost-effective wir-
ing and easy deployment, but users must understand its limitations to enjoy the ben-
efits of the wireless technology.
The Link Quality Indicator (LQI) of the ADAM-2000 displays how the facts below
affect the wireless signal. Its indicator represents the Received Signal Strength Indi-
cation (RSSI) and the retransmission times of a packet. The better the LQI, the better
the wireless data packet transmission quality. The limitation of the wireless communi-
cation range depends on following factors:
1.2.4 Selecting Topology
Usually, when building a network solution, the user has to take into consideration the
topology that will be used since different topologies have different characteristics.
The ADAM-2000 series provides start, tree and mesh topologies. No further configu-
ration is required, the ADAM-2000 series will automatically associate the network by
the locations of the ADAM-2000 series units. Users may select the correct topology
and install ADAM-2000s for their application systems. See the image below and
Table 1.2 provide the illustrations and characteristics comparison table of the three
topologies.
Transmission power Receiver sensitivity
Interference Line of Sight
Antenna Performance Shelter
Altitude above Ground Free Space Loss
Note! For more information on these factors, contact your supplier.
Table 1.3: Topology Comparison Table
Topology Star Tree Mesh
Power Consumption
Low Medium High
Installation Fee
Low Medium High
Network Coverage
Small Large Large
Network Capability
Small Large Large