Chapter
Error! Style not defined.
Error!
Style not defined.
13-11
connector. Wrap the waterproof self-adhesive tape with an insulating tape longer
than the waterproof self-adhesive tape.
6. All outdoor jumper connectors should receive waterproof sealing treatment and
a jumper should be equipped with a waterproof bend.
13.15 Installation and Check of an Antenna
Requirements:
1. An antenna support and a tower should be connected in a reliable and firm way.
2. Check the model of the antenna in use to make sure that it conforms to
networking planning.
3. The hanging height of an antenna refers to the distance between the ground and
the middle of the antenna. It is required that the actual hanging height of an
antenna conforms to network planning, and the antenna should be installed as
designed.
4. The RF antenna and the GPS antenna should be included in the protection area
of a lightning arrester (the area within the downdip of 45º from the lightning
arrester).
5. Measure the azimuth of an antenna. In case of a unipolarization directional
antenna, each antenna should be measured. The actual azimuth of an antenna
conforms to network planning and two antennas within the same sector goes in
the same direction. The azimuth error of the directional antenna is no more than
±5º.
6. Measure the actual mechanical downdip of an antenna with an angulometer. In
case of a unipolarization antenna, each antenna should be measured. An omni
antenna will not be checked and a directional antenna should have the azimuth
error of no more than ±0.5º. The actual mechanical downdip of an antenna
conforms to network planning and two unipolarization antennas have consistent
downdip.
7. The electrically controlled pointer antenna is adjusted with a spanner, and the
electrically controlled digital antenna is controlled with key input in the
equipment room. Note that the control line connected with the antenna is
vulnerable. In the case it is broken, it has to be directly adjusted with a spanner
