User's Manual Part 2
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CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
4--17
Table 4--1. TT--950/951/952 T
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CAS Computer Unit Interface Description (cont)
Connector Pin
Designation
Functional Description
RBP--6B Data Loader Discrete Input No. 2
See RBP--6A.
RBP--6C Data Loader Discrete Input No. 3
See RBP--6A.
RBP--6D Data Loader Discrete Input No. 4
See RBP--6A.
RBP--6E, 6F ARINC 429 CFDS Output: [RBP--6E (A), RBP--6F (B)]
This differential pair output is a low speed ARINC 429 bus (12.5k bits/second nominal),
that transmits data to an onboard maintenance computer or a central fault display system.
RBP--6G, 6H ARINC 429 CFDS Input: [RBP--6G (A), RBP --6H (B)]
This differential pair input is a low speed ARINC 429 bus (12.5k bits/second nominal), that
receives data from an onboard maintenance computer or a central fault display system.
RBP--6J Spare Pin
RBP--6K Spare Pin
RBP--7A Audio Level Program Pin No. 1 (NO)
T wo synthesized voice outputs with programmable output levels are provided by the
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CAS computer unit. The output at RMP--2F and --2G supply high level (up to 8 Watts)
audio signals to an 8 Ohm speaker. The second output at RMP--3F and --3G supply low
level (up to 80 milliwatts) audio signals to a 600 Ohm audio distribution system. All aural
traf fic and resolution advisories can be annunciated over these outputs unless cancelled
by a Cancel Discrete (RMP--3D).
Listed below are the audio level program pin configurations and the resulting output
levels:
Program Pin
RBP--7A RBP--7B RBP--7C Low Level Output High Level Output
(MSB) (LSB) dBm mW dBm W
Open Open Open 16 40 6 4
Open Open Ground 13 20 3 2
Open Ground Open 10 10 0 1
Open Ground Ground 7 5 --3 0.5
Ground Open Open 4 2.5 --6 0.25
Ground Open Ground 1 1.25 --9 0.125
Ground Ground Open --2 0.625 --12 0.0625
Ground Ground Ground 19 80 9 8
RBP--7B Audio Level Program Pin No. 2 (NO)
See RBP--7A.
RBP--7C Audio Level Program Pin No. 3 (NO)
See RBP--7A.