Contec FX-DS110-APE, Руководство пользователя, Страница: 51 / 132

Installation Method
FX-DS110-APE
40
Operating Environment and Radio Waves
When using this product to construct a network, install and operate
it considering the radio environment to optimize the performance.
Is allowed to use radio equipment at the installation location?
In some medical institutions and laboratories, radio-sensitive
precision instruments are used and it may be prohibited to use radio
equipment.
Radio waves are attenuated.
Although a radio wave is attenuated naturally as it travels from its
transmission source, it may also be attenuated by an object existing in
its way. Major obstacles that attenuate radio waves are as follows:
- Concrete wall
- Metal surfaces in the vicinity of the antenna
Obstacles blocking radio waves include metal walls and walls
containing a metal firewall.
Strictly speaking, nearly all objects in the path of the radio waves
(such as partitions or people) cause some attenuation but these do
not have a significant impact on network performance.
RSSI (Receive Signal Strength Indication) utility is available as a
means of knowing the signal strength of an incoming radio wave.
Placing this product for a greater RSSI value makes the
communication state more stable. If the RSSI value is small and
slightly moving the position of the product does not increase the
RSSI value, it indicates radio wave attenuation either to the distance
or by an obstacle.