User's Manual

26 82819_UM_ 40SMkII_E
4. Release the switch and put the EPIRB back into the bracket. What the self-test actually does is
first to wait app. 15 seconds to allow the reference oscillator inside the EPIRB to warm up. Then
a short burst is transmitted by the 121,5 MHz transmitter, while the output level of the
transmitter is checked. Finally, a test signal is transmitted by the 406 transmitter. During this test
signal the battery voltage, output power and frequency is checked.
While testing the 406 MHz transmitter a test message is transmitted, this test message is coded
with a special synchronisation code and will not be detected by the COSPAS/SARSAT satellites.
The purpose of this test message is to control the actual coding of the EPIRB. This can be done
with the Jotron AS test unit Tron DEC/UniDEC or an other EPIRB tester.