Trimble Inc. 6248192-B1 Benutzerhandbuch

SPSx80 Smart GPS Antenna User Guide     

Setup Guidelines     

For good performance, observe the following base station setup guidelines:

Place the GPS receiver in a location on the jobsite where equal range in all 
directions provides full coverage of the site. This is more important on larger 
jobsites, where the broadcast range of the base station radio may limit the 
operations of the GPS system.

Place the GPS antenna in a location that has a clear line of sight to the sky in all 
directions. Do not place the GPS antenna near vertical obstructions such as 
buildings, deep cuttings, site vehicles, towers, or tree canopy.

Place the GPS and radio antennas as high as practical. This minimizes 
multipath from the surrounding area, and enables the radio to broadcast to the 
maximum distance. 

Choose the most appropriate radio antenna for the size and footprint of the site. 
The higher the gain on the antenna, the longer the range. If there is more focus 
on the transmission signal, there is a reduced coverage area. A 3 db or 5 db gain 
antenna provides a mix of good range and reasonable directional coverage.

Make sure that the GPS receiver does not lose power. The GPS receiver has an 
integrated battery, which has to be charged. To operate for the full day without 
loss of power at the base station, provide external power. Sources of external 
power include:

–

AC  power

–

12 V car or truck battery

–

Trimble custom external battery pack

–

Generator power

–

Solar  panel

When you use an external power supply, the integrated battery provides a 
backup power supply, enabling you to maintain continuous operation through a 
mains power failure. 

When the GPS receiver is connected to a power source greater than 15 V, the 
integrated battery is continuously charged from the connected power source. 
This helps to ensure that the battery stays charged (SPS770 and SPSx50 only).

Do not locate a GPS receiver, GPS antenna, or radio antenna within 400 meters 
(about 1312 feet) of: 

–

a powerful radar, television, or cellular communications tower

–

another  transmitter

–

another GPS antenna