Adcon A850 User Manual page 27

is used in combination with one or several Adcon Wireless
Modem(s) A440, the Base Station configuration will consist in an
indoor unit (the A850) and one (or several) outdoor unit(s), the
A440(s). You must consider several factors, some of them quite
contradictory, when choosing the location:
• From a radio perspective, the height of the receiving antenna
is essential: the higher the antenna, the greater the range of
communication. For the GSM-operated RTUs, this is not an
issue, but you must make sure you have good on-site
coverage from your cellular provider.
• The Base Station should be situated in the same building
where the people managing the Base Station work, or at least
spend some of their time.
• Places like cellars, near heat sources, or damp locations are
not suitable.
• Geographically, it is better to have the Base Station in the
center of the area where the RTUs will be installed (this does
not apply to A733GSM stations).
• If you plan to use the Base Station as a server to allow other
people to log in and get data, be sure that a telephone line is
available exclusively for this use.
• Adcon also recommends that you have a telephone
connection next to the PC for when you need technical
support.
The communication distance you can achieve is directly propor-
tional to the mounting height of the receiving antenna. The propa-
gation of the radio waves used by the Adcon Wireless Modem
corresponds basically to the line of sight. Due to the curvature of
27
CHAPTER 2
Installation