Motorola PMP 320, Установка оборудования

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PMP320HDW2v1 3-29
Preliminary
JUL 2010
GPS Coax Cable Chapter 3: CMM4 Hardware Installation
Procedure 3-1 Mounting the GPS Antenna
1
Ensure that the mounting position:
•
has an unobstructed view of the sky to 20º above the horizon.
•
must not be the highest object on the tower. (The GPS antenna does not
need to be particularly high on a site, which would give it more exposure
to lightning. It just needs to have an unobstructed view of the southern
horizon.)
•
is not further than 100 feet (30.4 meters) of cable from the CMM.
2
Select a pole that has an outside diameter of 1.25 to 1.5 inches (3 to 4 cm) to
which the GPS antenna bracket can be mounted.
3 Attach the GPS unit to the bracket using 4 screws.
4 Place the U-bolts (provided) around the pole.
5
Slide the GPS antenna bracket onto the U-bolts.
6
Slide the ring washers (provided) onto the U-bolts.
7
Slide the lock washers (provided) onto the U-bolts.
8 Use the nuts (provided) to securely fasten the bracket to the U-bolts.
9 Connect the GPS coax cable to the female N-connector on the GPS antenna.
See the section GPS Coax Cable for additional details on the length and type
of coaxial cable needed.
10
Use water type tape and electrical tape to seal the connector.
GPS Coax Cable
The operator provides the GPS antenna coaxial cable between the CMM4 and the GPS antenna.
It must be engineered to length, and is not included with the CMM4. In most cases, the cable
length from the CMM4 to the GPS antenna must be less than 30 m (~100 ft).