68
Appendix
WAGO-I/O-SYSTEM 758
758-915
Bluetooth
®
ETHERNET Gateway
Manual
Version 1.1.0, applicable from FW/HW Version 01/01
Table 32: Radii to be kept clear
Distance
Radius for 1st Fresnel zone
100 m
1.7 m
200 m
2.5 m
300 m
3.0 m
400 m
3.5 m
Range can be affected by other wireless systems!
Other range-influencing factors that are difficult to detect and rule out exist in the
spurious irradiation from other wireless systems and/or in a temporal change of
the radio channel, for example when the subscriber moves (swaying of the mast in
strong wind), or other changes in ambient conditions (vehicles, movement of
stored goods, pedestrians). These factors can make a precise prediction of the
maximum range extremely difficult.
Effective path of radio waves is more significant than the actual distance!
Overcoming of maximum distances for a line-of-sight link is a scenario
completely different from use inside rooms or in the direct vicinity to competing
wireless technologies. In these types of scenarios the decisive factor is frequently
not the actual distance between the devices, but, rather, the effective path taken by
the radio waves for multipath propagation, along with the actual interference
present at the exact installation location. Under some circumstances, signal
quality may even be enhanced by increasing the distance between the devices.
