Chapter
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13-13
19. When there is no tower, the GPS antenna should be installed on the building top
and equipped with a standalone lightning arrester.
13.16 Check of the Standing Wave Ratio of a Feeder
The standing wave ratio of a feeder is checked as follows:
1. Measure the standing wave ratio after antennas and all feeders are installed.
2. The terminal of the indoor 1/2" jumper to the rack is connected with a standing
wave ratio tester for testing. The standing wave ratio should be less than 1.5,
preferably 1.3.
3. Fill in a corresponding vswr value and provide vswr test-chart.
13.17 Check of Indoor/Outdoor Environment
The indoor/outdoor environment is checked as follows:
1. Any outdoor engineering waste should be cleaned. After the installation is over,
the outdoor work site should be recovered to what it was, without any cable
strap, stub, waste paper box, waste cable or waste plastic bag. The whole site
should be clean and tidy.
2. Put away indoor unused materials. The materials to be put in the equipment
room should be kept in order. Keep everything indoor clean and tidy. No
littering is allowed.
3. Under the raised floors at the rack bottom and around the rack, there should be
no cable strap, stub, desiccant and other engineering materials left.
4. The front door, rear door and side plate of the rack should be cleaned without
visible stains caused by hand touching. There should be no dirt inside and
outside the rack (dead angle) and inside the cabinet, there should be no cable
clip or sundries left.
5. There should be no fingerprint or other stains on the cabinet surface.
