Watkins-Johnson Company R1910, Руководство пользователя

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Repeater Installation
2-3
2-5.1 Donor Antenna Installation
The Donor antenna will be mounted outside. The antenna should be installed so that it is in line-of-
sight of the base station and is pointed directly at it. If there is an arrow or polarity marking indicated
on the antenna, ensure that it is pointing up. Be sure that the antenna or mast is properly grounded
with a grounding strap. For clearances, grounding and mounting requirements please refer to Article
810 of NEC handbook.
For the R1910, determine where the RF cable will enter building and drill hole if necessary. A
lightning suppressor is highly recommended. Install suppressor inside building where cable entry is.
Attach grounding strap to lightning suppressor. Measure distance between antenna connection and
lightning suppressor. Be sure to add some length for drip loop and cut cable. When routing cable, be
careful not to kink, cut or damage cable. Install connectors on cable using the appropriate tool and
connect to antenna and lightning suppressor connector labeled “Surge”.
2-5.2 Server Antenna Installation
The Server antenna should be located in an open area free from metallic obstruction if possible and in
a location such that mobiles will always be at least 2 meters away. Mount antenna and route cable
from antenna to R1910 location. When routing cable, be careful not to kink, cut or damage cable. No
lightning suppression is needed if the antenna is indoors or under an overhang. Install connector using
the appropriate tool and connect to antenna. For clearances, grounding and mounting requirements
please refer to Article 810 of NEC handbook.
2-5.3 Proper Weather Sealing of RF Connectors.
It is important to properly weather-seal mated connectors against water migration into the RF
connectors and coaxial cables. Water migration into the jumper cable will cause considerable signal
attenuation and poor return loss. There are several commercial products available for this purpose.
The following guidelines should be followed when weather sealing antennas:
•
Make sure the connector and cable to be sealed are clean and dry.
•
Wrap the sealant to ensure a continuous seal around the connector body and the coaxial cable. If
you pre-wrap the connection with vinyl tape, be careful to leave extra space for the sealant to
contact the connector body and the cable directly.
•
After the entire connection has been covered with the manufacturer's recommended amount of
sealant, mold and form the sealant by hand to ensure good contact and to force out trapped air.
•
Carefully inspect the seal to make certain that all joints and openings are covered and sealed.
•
Wrap the sealant with UV stabilized vinyl tape for additional protection.
2-5.4 R1910 Installation