Operation, A. position data processing, B. 24-bit address reprogramming – ACR&Artex ELT to Nav Interface User Manual
Page 27
25-69-10
Page 27 of 58
APR 30/12
ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
453-6500
TASK 25-69-10-870-803
3. Operation
SUBTASK 25-69-10-870-001
A. Position Data Processing
(1)
Operation of ELT/NAV Interface position data processing (i.e., receive, convert, and transmit)
is automatic and requires no operator interface other than activating the +28 VDC power
source.
(2)
The following conditions must be true for ELT/NAV Interface position data processing to
function:
(a)
+28 VDC aircraft power must be applied to the unit (i.e., the power source must be
switched on).
(b)
The aircraft navigation system must be on and transmitting position data to the ELT/
NAV Interface.
(3)
Once the ELT is activated, it stops receiving position data; however, the ELT/NAV Interface
continues to transmit as long as it has power and is receiving position data.
SUBTASK 25-69-10-870-002
B. 24-Bit Address Reprogramming
(1)
Operation of the ELT/NAV Interface 24-bit address reprogramming function is automatic and
requires no operator interface other than activating the +28 VDC power source.
(2)
When +28 VDC power is applied to the ELT/NAV Interface, it reads the ELT 24-bit address
data and compares it to the 24-bit address data hard wired to the ELT/NAV Interface.
(3)
If a difference in 24-bit address programming is found, the ELT/NAV Interface reprograms the
ELT to the data read from the hard wired installation.
(4)
When the two sets of 24-bit address data are identical, the ELT/NAV Interface takes no action.
(5)
If the ELT is programmed with a protocol other than 24-bit address, the ELT/NAV Interface
attempts to reprogram the ELT with new aircraft identification data and fails.
(a)
If P1 (i.e., 24-bit address) is connected to the ELT/NAV Interface and the ELT is
programmed with a protocol other than 24-bit address, an error will be displayed by the
ELT and remote switch LEDs.
(b)
See SUBTASK 25-69-10-750-002, on page 36, and Table 6, on page 38.