User's Manual

Trimble R7/R8 GPS Receiver User Guide 121
General Operation 14
Trimble R8 GPS Receiver Operation
To begin internal logging, you must use a Trimble controller, or the GPS
Configurator software. The Trimble R8 receiver does not have an
internal clock, so you can only conduct timed survey sessions if the
receiver has a continuous power supply.
When the internal memory is full, the receiver stops logging data, and
the Logging/Memory LED switches off. Existing data files are not
overwritten. You can use the Auto-delete option to override this action
and automatically delete the oldest files when the receiver memory is
full. However, you should use this option with caution because it can
lead to data loss.
Table 14.2 shows approximate storage requirements for different
logging rates. The values shown are for a one-hour logging session with
six satellites visible.
144.2 Logging to a Trimble controller
When the Trimble R8 receiver is connected to a Trimble controller, you
can log GPS data from the receiver to the controller, or to a PC card
inserted in the controller. When you use a Trimble controller, you do
not use the receiver’s controls. Instead, you use the controller functions
to set logging options, specify filenames, and control when logging
occurs.
Data is stored in job files, which can be transferred to your office
computer using Trimble’s Data Transfer utility.
For more information on logging data from a receiver using a Trimble
controller refer to the user guide for your particular controller.
Table 14.2 Storage requirements
Logging rate Memory required
10 Hz 2,588 KB
1Hz 335 KB
5 seconds 87 KB
15 seconds 37 KB