User's Manual

SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
The ARINC 429 Sign Status Matrix Bit definitions for Binary data and
Binary Coded Decimal data are shown in Table 4-10 and Table 4-11
respectively.
Table 4-10: Sign Status Matrix (SSM) (BNR)
BITS
Meaning
30
31
0 0 Failure Warning
0 1 No Computed Data
1
0
Functional Test
1
1
Normal Operation
Table 4-11: Sign Status Matrix (SSM) [BCD]
BITS
Meaning
30 31
0 0 North/Plus
0
1
No Computed Data
1
0
Functional Test
1
1
Undefined
ARINC 429 inputs are classified as one of the following: high-speed (H),
low-speed (L) or either (H/L). The A429 receivers are capable of
receiving high- or low-speed data. The ports are designated H or L if they
are designated for a function with a known bus speed, otherwise H/L is
assigned (there is no hardware difference between the H, L or H/L ports).
ARINC 429 outputs are also classified as either high-speed (H), low-
speed (L) or selectable (H/L). A429 outputs designated as H/L speed are
capable of operating in either high- or low-speed modes, selectable by
the APM or program pins through the ASDB database.
(b) Ethernet 10 Base-T Signals
Ethernet 10 Base-T is specified in IEEE Standard 802.3 Ethernet 10
Base-T provides communication at a data rate of 10 MBPS over two
pairs of wires, where one twisted pair is used to receive data and the
other twisted pair is used to transmit data. Segments of approximately
100 meters in length can be constructed when twisted pair wire that
meets the EIA/TIA Category 3 wire specifications is used.
4-110
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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