Ameri-King AK-451-P-ELT - Manual (Page 6)

6
The PLB transmits the standard swept tone. The LED ON lights flashing, indicate when the PLB is activated. The ON switch allows
you to turn on the PLB manually.
The PLB unit is able to withstand extremely harsh environments. Units exactly like yours have been subjected to numerous 500 G
shock pulses; 1000 pounds crash weights and severe penetration tests, and continue to operate normally. Continued operation in a
temperature range of -20 degrees Celsius to +55 degrees Celsius is assured.
The AK-451-PLB supports the following protocols:
User Location Protocol (Long Message): This option is formed by coding bits 1 through 106 of the PLB as a User Protocol.
Standard Location Protocol (Long Message): This option uniquely identifies the PLB using a unique serial number allocated by either
the competent national authority or the beacon manufacturer accompanied with the Cospas-Sarsat beacon type approval certificate
number.
National Location Protocol (Long Message): This option uses a unique serial number allocated by the competent national authority to
uniquely identify the beacon.
Serial User Protocol (Non-location protocol) (Short Message): Coded with PLBs Unique Beacon Serial Number.
Note: PLB’s leave Ameri-King Corp. with Standard Location Protocol (Long Message), but can be reprogrammed at a
service center to other Protocol, including nationality of registration.
The PLB may accept GPS/NAV position input by connecting the external GPS/NAV to the programming connector
4.2 OPERATION
The AK-451-PLB, Personal Locator Transmitter, is a state of the art Micro controller technology, long lasting, solid state based
equipment. It is an extremely reliable, highest standard of quality, designed to meet TSO-C126 and TSO-C91a requirements for
critical application.
Upon selected ON, it transmits the standard swept tone on 243/121.5 MHz lasting until battery power is gone, 78 hours approximately.
@-20 deg C, end of battery life. This 243/121.5 MHz signal is mainly used to pinpoint the beacon during search and rescue
operations.
For the first 24 hours of operations, a 406 MHz signal is transmitted at 50-second intervals. This transmission lasts 520 ms and
contains identification data programmed into the beacon and is received by COSPAS-SARSAT satellites. The transmitted data is
referenced in a database (maintained by the national authority responsible for PLB registration) and used to identify the beacon and
owner.
Accuracy:
Doppler positioning is employed using both 121.5 MHz and 406 MHz signals. The Position accuracy of the 406 MHz signal is about
110 meters at 9.5 degree Cross Track Angle (found in Satellite Qualitative Test at a COSPAS-SARSAT approved Laboratory).
4.3
TRANSMITTER FUNTIONAL TEST
The PLB should be tested every month.
4.3.1 Switch ON / OFF / SELF TEST Operation:
The PLB has an "OFF" position. This allows the beacon to be handled or shipped without 'nuisance' activation. Care should be
taken when transporting or shipping the PLB not to move the switch or to allow packing material to become lodged such as to
toggle the switch.