Topcon AGA5495, Operator'S Manual

Page: 48 / 144

5.2. Setting up GPS
30
after the vehicle is turned off. The Keep Alive Time determines how
long the receiver remains powered.
Keep alive time
Note
: This feature is only available if Use Ignition Line is set to
Enabled
.
(AGI-4 only) Keeps the GPS receiver active after the system has been
shut down. This is useful to retain accurate positioning information
(satellite convergence). For example: To keep the receiver on for 1
hour after the system is shut down, enter 60.
Load OAF file
Loads an Options Authorization File to the GPS receiver. This is
normally done prior to receiver installation, but the file can be
updated in the field via USB (if required).
Baud rate
The data transmission rate for modems. GPS receiver baud rate can be
changed from the default value. This setting should not normally be
altered. If the setting does need to be changed, refer to the manual
supplied with the modem.
5.2.2. Correction setup
GPS correction sources are used to increase the accuracy of the GPS
position.
To set up the GPS correction source:
1. Select
System
/
GPS
/
Correction
.
2. Select the required
CORRECTION SOURCE
.
Note
: The available correction sources are defined below. The extra
options that must be defined vary depending on the correction source
selected, refer to Correction source options, page 32.