User Guide

Y1-03-0180 Rev. A
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4.7 Full functional Self Test
Please read all instructions before performing any of the tests. Be prepared to record data from
the test.
4.7.1 The ThunderBird SSAS can be tested in or out of the release bracket. A Self Test is initiated by
lifting the thumb switch to a vertical position and holding it in this position for at least one
second. The initiation of the test is indicated by the simultaneous and brief lighting of the green
and red LED's.
The sequence of tests is:
1. Check Data Integrity.............................................Beep and lights up LED if passed
...................................................................................Stop if failed
2. Check 406 MHz Synthesizer ................................Beep and lights up LED if passed
..................................................................................Stop if failed
3. Check RF Power/Battery ......................................Beep and lights up LED if passed
..................................................................................Stop if failed
4. GPS Header...........................................................Beep and lights up LED if passed
..................................................................................Stop if failed
If all of the above occurs, the test has been successful.
4.7.2 It is strongly recommended to test the ThunderBird SSAS on a Monthly basis.
4.8 External GPS Interface
4.8.1 External GPS Interface Requirements:
In order to be compatible with the ThunderBird SSAS an
external GPS receiver must provide location information according to the following requirements:
• NMEA 0183, Version 1.5 or higher
• Baud Rate: 4800
• Talker Device Identifier: GP (GPS Receiver)
• Sentence Format: GGA (GPS Fix Data)
4.8.2 Using the GPS Interface: Once a compatible operating GPS receiver is connected to the Beacon,
the beacon will store GPS data for incorporation into the emergency message, which is
transmitted to the satellite. This can provide more accurate positioning data to the National
Authority and may lead to faster response. Since the last valid GPS position data is always kept in
the memory of the Beacon, the user should take care to make sure that the GPS position data
Battery connection Plug