5700/5800 GPS Receiver User Guide 55
General Operation 4
5700 Operation
The external power source is always used in preference to the internal
batteries. When there is no external power source connected, or if the
external power supply fails, the internal batteries are used. The
internal batteries are drained in turn, and the receiver automatically
switches to the full battery when the first battery is drained.
If no external power is supplied and both internal batteries are drained,
none of the data that you have logged is lost. When internal or external
power is restored, the receiver restarts in the same state as when power
was lost. For example, if the receiver was logging data, the data file is
not corrupted, and when power is restored the receiver resumes
logging with the same settings as before.
The power supply that is supplied with the 5700 receiver charges the
receiver’s internal batteries while they are still in the receiver. To do
this, connect the power supply to the power/serial data cable, connect
the cable to Port 2 on the receiver, and connect the power supply to an
AC power source, as shown in Figure 4.2.
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