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When mounting your wireless transmitter, care should be taken to make
sure it is as far away from any metal objects. Otherwise, it has the potential to
interfere with the way the unit radiates and may cause signal lose or possibly
even the inability to communicate at all with your receiver.
When installing your wireless transmitter it is important to position your
device in such a way as to optimize the antenna location within what's known
as the "Fresnel Zone".
The Fresnel Zone can be thought of as a football-shaped invisible tunnel
between two locations that provides a path for RF signals between your
transmitter and receiver.
TRANSMITTER
In order to achieve maximum range, the football-shaped path in which radio
waves travel must be free of all obstructions. Obstacles in the path (especially
metal) will decrease the communication range between your transmitter
and receiver. Also, Transmission over half of the Fresnel zone ends up being
obstructed by the earth resulting in significant reduction in range. To avoid
this problem, the transmitter should be mounted high enough off of the
ground so that the earth does not interfere with the central diameter of the
Fresnel zone.
FRESNEL ZONE
It is important to understand that the environment may change over
time due to new equipment or machinery being installed, building
construction, etc. If new obstacles exist between your transmitter and
receiver, the devices can be raised on one end or on both ends to
hopefully clear the Fresnel Zone of obstructions.
No co-location with other radio transmitters is allowed. By definition,
co-location is when another radio device or it's antenna is located
within 20 cm of your receiver/transmitter and can transmit
simultaneously with your unit.
Never install the WRS232 wireless transmitters within 20 cm or less
from each other.
RECEIVER
Figure 2-9 Fresnel Zone
NOTE:
NOTE:
NOTE:
Setup and Configuration
2
2-6
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