User's Manual

4 Setup Guidelines
38 SPSx50 Modular GPS Receiver User Guide
• To mount the modular receiver on a pole use the pole mounting brackets (2)
and a second tripod clip (P/N 571 204 300) as shown below.
Figure 4.1 Rod mount for modular receiver
To mount the modular receiver on a marine vessel use the receiver bracket
(P/N 56830-00). The receiver bracket allows two receivers to be mounted
together for marine moving base and heading applications (see chapter XXX
Page XXX)
• Make sure the rover receiver does not lose power. The rover receivers are
typically powered from their internal batteries all day. The batteries in the
SPSx80 receiver can be changed when flat. The battery in the SPSx50 receiver
cannot be changed, but it last longer than a day (see Chapter 10, Specifications).
If you do not use the rover receiver very often, ensure that it is charged at least
every three months. For vehicle operation or marine vessel operation, Trimble
recommends that you use an external power source so that the internal battery
can be saved for times when the receiver is being used off the vehicle or vessel.
• Avoid locating the receiver or antenna within 400 meters of powerful radar,
television, cellular communications tower, or other transmitters or GPS
antennas. Low-power transmitters, such as those in cell phones and two-way
radios, normally do not interfere with receiver operations. Cell towers can
interfere with the radio and can interfere with GPS signals entering the receiver.
High-power signals from a nearby radio or radar transmitter can overwhelm the
receiver circuits. This does not harm the receiver, but it can prevent the receiver
electronics from functioning correctly.
• Do not use the rover receiver directly beneath or close to overhead power lines
or electrical generation facilities. The electromagnetic fields associated with
these utilities can interfere with GPS receiver operation. Other sources of
electromagnetic interference include:
– Gasoline engines (spark plugs)
– Televisions and computer monitors
Rob to provide graphic.