Huawei iSiteC BTS3601C Installation Manual page 53

Installation Manual
iSiteC BTS3601C CDMA Base Station
Sector 3
Figure 3-26 Correspondence between directional antenna azimuth and sector
4) Tighten up the lower fixing clip of the antenna till it cannot be moved by hand.
5) Adjust the antenna pitch angle: For the directional antenna whose mounting hole
corresponds to its pitch angle, install it via its mounting hole directly. Make sure the
supporting post of its support is kept strictly perpendicular to the ground during the
installation. Adjust the pitch angles of other antennae in the following way:
Determine the antenna pitch angle using an inclinometer.
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Turn the antenna slightly and adjust the pitch angle till it satisfies the engineering
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design index value. Generally the error of the pitch angle should be Ÿ0.5°.
Tighten up the upper fixing clip of the antenna till it cannot be moved by hand;
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Use the inclinometer in the way as shown in Figure 3-27 and Figure 3-28.
Figure 3-27 Pitch angle of the antenna before being adjusted by the inclinometer
North
Sector 1
120 ˙
120 ˙
Sector 2
3-21
Hardware Installation
3 Installing RF Antenna and Feeder System