ACR Electronics RLB-37 2842 Product Support Manual

Also see for GlobalFix Pro RLB-37: Product support manual

Contents

Y1-03-0242 Rev. D 25APPENDIX A - USING AND TESTING THE GPS SYSTEMS1. Internal GPS position systemThe GlobalFix™ PRO is fitted with an internal GPS receiver that willdetermine the coordinates (latitude and longitude) of the beacon’s position onthe globe, to be transmitted to the Cospas-Sarsat emergency system.When the beacon is turned on, the internal GPS is immediately turned on andit attempts to acquire positional coordinates. GPS coordinates can beacquired any time that the GPS is on, but only valid data is saved. Once thebeacon acquires valid coordinates, the data is included as part of the nexttransmitted 406 MHz digital message.The internal GPS operates on a schedule during which the beacon is on for atime, actively acquiring coordinates, and off for a time, in a resting state. Theschedule is designed to conserve battery but, at the same time, assure thatnavigational coordinates are regularly updated.2. LED indication of GPS fixWhen the beacon is activated and valid coordinates are acquired, the data isincluded in the digital message of the next 406 MHz transmission. The LEDblinks green when GPS coordinates are sent.If a time period of 4 hours passes without the internal GPS receiver beingable to update the last good set of navigational coordinates, the messagetransmitted by the beacon will revert back to default data. At this point thegreen LED will stop blinking and the red LED will flash. The internal GPS willcontinue to seek coordinates and when successful the green LED will flash.This new data will be transmitted in the next message burst and the greenLED will continue to flash.