Chapter 10 Installing the Main Antenna Feeder System
10-11
Antenna pole f75mm
738 516
737 974
737 974
Connected via a short bolt and fixed with
two nuts for enhanced connection firmness
A short bolt connects the antenna and
the fastener; a spring washer and a flat
washer is added here; waterproof gasket
is in the inner circle of the nut
Pull the antenna top upward and
downward after initial
installation and fixation to adjust
the pitch angle of the antenna
Kathrein 650
directional
antenna
Pull the antenna leftward and rightward
after initial installation and fixation to
adjust the azimuth of the antenna
Scale 00~160
Fig. 10.4-2 Installing the Kathrein Antenna
4. Adjusting the pitch angle of the antenna
1) Adjust the pitch angle of the dip meter to the angle required by the engineering
design;
2) Turn the top of the antenna slightly, let go or hold fast the antenna at its top.
Adjust the pitch angle of the antenna till the bead is centered when the adjusted
dip meter is next to the directional antenna, as shown in Fig. 10.4-3;
3) After adjusting the pitch angle of the antenna, tighten the fastener 737974.
