About The Influence Of Surrounding Radio Waves - Patlite WD PRO Series Instruction Manual

Wireless Data Communication System - WD PRO Series Instruction Manual

6.2.2 About the Influence of Surrounding Radio Waves

If the WD wireless network is affected by radio interference from electronics, microwave ovens, or other
manufacturing equipment, normal operation may not be possible. Check the radio wave environment before
installation and confirm there is no radio interference on the wireless radio bands you are planning to use.
Causes of Radio Interference
Other wireless devices
Noise from other equipment
Noise from the surroundings
Surrounding obstacles*
*Various obstacles (wall, floor, ceiling, pillar, equipment) may exist in the installation environment. The reception of radio
waves changes depending on the relationship between the position of each device (WDR, WDT), obstacles, and the
surrounding environment. As shown in the figure below, radio waves transmitted from a single point are delivered to each
device (WDR, WDT) from multiple directions, such as when radio waves travel in a direct line, and when radio waves
reflect off obstacles. Radio wave interference could be caused by this scenario, and operation may not be possible due to
canceling radio waves.
WDT
When wireless LAN and in-house PHS access points are installed in the surrounding environment, install WDR so
they are 5 to 10 m or more away from access points.
Wireless devices using the same frequency or frequencies in
the same neighborhood.
Noise caused by power supply circuits, electronic circuits, or
oscillators.
・Noise from motors and engine equipment
・Noise from transmission lines, power supply equipment,
・Noise from microwave ovens and fluorescent lamps.
Interference caused by phasing with own radio waves.
Direct Wave
Reflected Wave
(Opposite phase)
Received Wave
The two radio waves cancel each other out
Direct
Obstacles (wall, floor, ceiling, pillar, building)
21
Description
and industrial equipment.
+
Receive
WDR
6. Installation