Adcon A720 Betriebsanweisung PDF herunterladen (Seite 15)

CHAPTER 2

Installation

sight” distance an addIT can communicate is 800 m

(approximately half a mile). This is valid if the partner device is

mounted on a 3 m mast (9 ft) and the addIT is mounted on a 30 cm

mast (1 ft).

The above figures are estimates based on a great deal of

experience with installing this kind of equipment and assume a

typical height of 3 m (9 ft) for the antennas of the remote

measuring stations. Similarly, ideal physical conditions are

assumed for the terrain including a flat, open, non-urban

environment.

What conclusions can be drawn from Table 1? Primarily, you can

see the importance of having the base station antenna as high as

possible. To gain antenna height, you have several options:

• Build a mast directly on the ground; however, a 30 m (100 ft)

mast may not be a practical option.

• Set up a mast on a tall building (of course, it has to be the

building where you want to have the base station).

• Install the base station in a building that is situated on a hill.

Note that the cable for the outdoor unit delivered with the system

is 30 m long (about 100 ft). This means you must locate your

indoor unit no more than 30 m from the outdoor unit. Extending

the cable is not recommended, because the signal strength loss is

significant.

To use the telemetry gateway and wireless modem, you need to

do the following:

• Install the outdoor unit.

Table 1. Communication Between Base Station and

A730MD/A733

Receiving antenna

height

Typical distances

achieved

6 m (18 ft) 5 km (3 miles)

10 m (31 ft) 8 km (5 miles)

20 m (62 ft) 16 km (10 miles)

30 m (92 ft) 24 km (15 miles)

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Adcon A720 Betriebsanweisung Seite 15