ACR&Artex SLB406 ELT - Manual (Page 18)

ARTEX PRODUCTS / ACR ELECTRONICS, INC
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
SLB 406 ELT
Page 18 of 43
MAR 27/11
570-6700 Rev. B
Initial Issue DEC 19/2006
Normal Operation
After this initial Activate illumination, the red XMIT LED will blink every two seconds.
406.028 MHz Transmission
The 406.028 MHz transmission occurs approximately once every 50 seconds. This
transmission includes coded information including the beacon’s unique ID. During the
transmission, the red XMIT LED lights for the duration of the transmit pulse. There is a
50 second delay in the initial transmission after activation as required by Cospas-Sarsat.
The purpose of this delay is to minimize the occurrence of false alerts, as a person has
50 seconds to turn off a beacon that was mistakenly activated.
121.5 MHz Homing Transmissions
These homing transmissions operate continuously while the beacon is activated except
during the 406 MHz pulse transmissions.
Deactivation
The SLB 406 can be deactivated from either the Automatic or Manual Activation modes
by pressing and holding the OFF button for approximately two seconds. The red XMIT
LED will illuminate for 1 second prior to turning off to acknowledge the deactivation. The
red XMIT LED will stop blinking when the beacon is turned off. The SLB 406 can be
turned back on by simply pressing the ACTIVATE button for approximately two seconds.
If the beacon is deactivated without the Activation Lanyard installed, the batteries will
continue to discharge.
Self-Test
Self Tests are to be conducted only by second line maintenance
To conduct a self-test of the SLB 406, press the TEST button and hold for approximately
two seconds. The red XMIT LED will illuminate for approximately one second to
acknowledge.
The PASS LED (green) and the FAIL LED (red) will then illuminate together for
approximately 1 second to test these LEDs.
During the self-test process, the XMIT LED flashes in the following progression:
The XMIT LED illuminates solidly for approximately 1 second during the 406.028 MHz
and 121.5 MHz pulse tests.