User's Manual
CHAPTER2
Installingtheremotewirelessmodem
9
Installingtheremotewirelessmodem
Two views of the RA440 are shown in Figure 1 and Figure 2.
The following restrictions apply:
• In general, the typical “line-of sight” distance the RA440 can
communicate is 10 km (6 mi.). This is valid if both the ISM
antenna of the remote wireless modem and the antenna of its
partner device are mounted on a 3 m mast (9 ft.).
Figure 1. RA440 Remote Wireless Modem (bottom up)
Note: The results may vary under different conditions, and you can
sometimes achieve longer (or shorter) distances.
The above does not apply for the transmission between the RA440 and
the A850. In principle no distance limit exists for this transmission
type as long as your cellular provider covers the area where the
RA440 is installed.