Navigation system interface requirements, A. arinc 429 latitude and longitude data input, B. rs-232 latitude and longitude data input – ACR&Artex ELT to Nav Interface User Manual
Page 26
ARTEX PRODUCTS / ACR ELECTRONICS, INC.
DESCRIPTION, OPERATION, INSTALLATION AND MAINTENANCE MANUAL
453-6500
25-69-10
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APR 30/12
TASK 25-69-10-870-802
2. Navigation System Interface Requirements
SUBTASK 25-69-10-870-001
A. ARINC 429 Latitude and Longitude Data Input
(1)
The ELT/NAV Interface will accept signals “A” and “B” from any ARINC 429 navigation system.
(2)
The interface looks for labels “310” (latitude) and “311” (longitude), which contain position
data.
(3)
The interface accepts data at:
(a)
High speed,
(b)
Low speed,
(c)
GAMA high speed, or
(d)
GAMA low speed.
(4)
ARINC 429 output speed must not change during ELT/NAV Interface operation.
(5)
The interface automatically detects output speed after turn-on and locks on after 20 seconds.
(6)
ARINC 429 is the preferred output for navigation systems that support both ARINC 429 and
RS-232 output.
SUBTASK 25-69-10-870-002
B. RS-232 Latitude and Longitude Data Input
CAUTION:
DO NOT CONNECT ARINC 429 AND RS-232 INPUTS AT THE SAME TIME.
(1)
For navigation systems that output only RS-232, the ELT/NAV Interface accepts the following
RS-232 format only.
(a)
Baud Rate (fixed): 9600
(b)
Parity: None
(c)
Data Bits: 8
(d)
Stop Bits: 1
(2)
The RS-232 format must have:
(a)
Start of Text (STX),
(b)
“A” identifier for latitude,
(c)
“B” identifier for longitude, and
(d)
End of Text (ETX).
(3)
The RS-232 format expects carriage returns, but will not operate if there are line feeds.