Wireless Communication Range - Advantech ADAM-2000 Series User Manual

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:
Transmission power

 Interference
 Antenna Performance
 Altitude above Ground
1.2.3.1 Line of Sight
The distance of each node is defined as the clear path between the antennas which
known as line of sight. Anything within the path will interrupt the radio transmission
that interference the communication. Beware of the trees, buildings, moving objects,
or other obstacles in between the antennas.
Receiver sensitivity

 Line of Sight
 Shelter
 Free Space Loss
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