Ameri-King AK-451-P-ELT User Manual
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Switch, alternate / alternate / momentary positions:
• "ON" Alternate position. Lift & flip the Switch to the ON position: PLB transmits immediately. ON LED light on the unit
flashes, 1 second ON, 4 seconds OFF.
• "OFF" Alternate position. Lift & flip the Switch to the ON position: The PLB is turned off.
• "SELF TEST" Momentary position. Lift & flip and hold the Switch to the SELF TEST position: PLB self-test is confirmed
after the switch is held for 25 seconds. If the self-test is passed, the ON LED light must be extinguished. The PLB system is fully
self-tested.
4.3.2 Transmitter Self-Test:
Lift & flip and hold the main switch, from the "OFF" position to the "SELF TEST" position. The ON LED light shall illuminate
for 4 seconds then extinguish. This is to allow coding programming during next 20 seconds window and self-test for 1 second
thereafter.
The PLB may be coding programming during the aforementioned 20 seconds window period. If no programming happened the
PLB will then enter the Self Test Mode for 1 second thereafter.
Self-test results after (4+20+1) =25 seconds, is:
If the self-test is passed, the LED is steadily extinguished.
If the self-test is failed, the LED flashes as shown below:
1 flash: Internal Data stored in Memory at fault.
2 flashes: Distress ID stored in Memory at fault.
3 flashes: Battery voltage is low < Useful Life Battery Voltage setting.
4 flashes: Vcc supplies for F3, F2, or F1 at fault.
5 flashes: F3 RF power level < 33 dbm @ 406.028 MHz
7 flashes: F1/F2 VHF RF power level < 17 dbm @ 121.5/243 MHz.
9 flashes: PLL locked in F3 or F1 or F2 at fault.
Continuous flash: no F3/F2/F1 RF output power, PLB shuts down completely.
NOTE:
The self-test mode that transmits a 406 MHz test code pulse monitors certain system functions before returning to the SELF TEST
mode. The 406 MHz test pulse is ignored by any satellite that receives the signal, but the PLB uses this output to check output power
and correct frequency.
•
Self-test is 520 ms long message burst on the 406 MHz signal. Synchronization pattern is 011 010 000.
•
Self-test is then 121/243 MHz (VHF) Continuous Wave during 1s.
The PLB may accept GPS/NAV position input by connecting the external GPS/NAV to the programming connector. The PLB can be
reprogrammed at Ameri-King’s service center to other Protocol, including nationality of registration.