Product Info

Y1-03-0174 Rev. A Draft
6
in the beacon via the GPS I or GPS O the red LED will turn off and the green LED will take over
flashing once every 2 seconds.
The TerraFix™ 406 GPS (model 2798.4 only) is equipped with an internal GPS engine. If no
external GPS interface receiver is found, upon activation, the TerraFix™ 406 onboard GPS engine
will search to find you’re LAT/LON and incorporate it into your 406 MHz signal. In the case when
external and internal GPS are present, the internal GPS data will have priority at activation.
When the TerraFix™ 406 GPS is turned ON, the GPS engine is also immediately turned ON and
will immediately begin acquiring data. Initially the red LED flashes once every 2 seconds to indicate
the TerraFix™ 406 GPS is turned ON and operating. As soon as the GPS receiver acquires good
internal navigational data the red LED stops blinking and the green LED flashes once every 2
seconds. Once good navigational data has been obtained, the GPS receiver waits for 20 minutes
before looking for new navigational data again. If for any reason a time period of 4 hours passes
without the GPS receiver being able to update the last good set of navigational data, the message
transmitted by the TerraFix™ 406 GPS will revert to default data. At this point the green LED will
stop blinking and the red LED will flash once every 2 seconds. If at any time after this, good
navigational data is obtained, this data will be transmitted, the red LED will stop blinking and the
green LED will begin flashing again.
Figure 2 Antenna Position
Unlock and
position
upright
X
Y
Z
Figure 3 Key pad cover
Open the key pad cover for access to
Test or activate the beacon
Figure 4 Activation
Press both test buttons simultaneously for
more than ½ second and no longer than 5
seconds