ARINC

Question 1

This code uses groups of four bits to represent ten symbols.

Answer 1

Binary Coded Decimal (BCD).

Question 2

Octal notation numbers is comprised of a series of ______ groups.

Answer 2

three-bit groups.

Question 3

Hexadecimal notation numbering system is comprised of a series of ______ groups.

Answer 3

four-bit groups.

Question 4

One of the most important facets of ARINC; from a technician’s point of view, would have to be:

Answer 4

the standards set for various systems.

Question 5

What does (GAMA) stand for?

Answer 5

General Aviation Manufactures Associations

Question 6

The data bus standard applies only to the data transferred on the external data bus, not to:

Answer 6

the data manipulated inside the LRU.

Question 7

Each data bus is dedicated to a specific data format. For instance, a technician will never find a data bus that:

Answer 7

transmits ARINC 429 data and then changes format to transmit ARINC 629 data.

Question 8

Many data bus systems are _____ ______ and very important that the two conductors never be switched.

Answer 8

polarity sensitive

Question 9

Avionics Standard Communication Bus (ASCB) is manufactured by:

Answer 9

Honeywell

Question 10

The Commercial Standard Digital Bus (CSDB) format is used on aircraft that employ systems manufactured by:

Answer 10

Rockwell Collins Avionics

Question 11

• The ASCB is a bi-directional data bus operating at:

Answer 11

667 KHZ

Question 12

When a portion or portions of the data signal are completely lost during transmission it is determined that during transmission that:

Answer 12

a dropout has occurred.

Question 13

Also if the digital waveform contained heavily rounded corners it would be considered that the:

Answer 13

signal is attenuated.

Question 14

ASCB cable
Maximum impedance Max Z:

Answer 14

125 ohm +/- 2 ohms.

Question 15

ASCB Cable
Maximum capacitance is equal
to Max C =

Answer 15

12pf +/- 2
picofarads.

Question 16

CSDB is a one-way data bus system between:

Answer 16

one transmitter and maximum of 10 receivers

Question 17

The commercial standard bus system operates at a high speed of:

Answer 17

50.0 Kbits/second

Question 18

Manchester code is:

Answer 18

self-clocking.

Question 19

ARINC 429 shows that each bit actually consists of:

Answer 19

two voltage values, data signal +10 Volts or
-10 Volts and the null signal.

Question 20

Using the RZ (return to zero) format allows ARINC 429 to be:

Answer 20

“self-clocking”

Question 21

ARINC 429 is also a bipolar format. Bipolar means the data signal actually:

Answer 21

reverses polarity (two-polarity) when it changes from binary 1 to binary 0.

Question 22

ARINC 429 Transmitter voltage tolerance is as follows:

Answer 22

Binary 1 is equal to +10 Volts +/- 1 Volt, Binary O is equal to - 10 Volts +/- 1 Volt and Null voltage is 0 Volts +/- 0.5 Volt.

Question 23

ARINC 429 high speed is =

Answer 23

100 Kbits/second

Question 24

ARINC 429 Low Speed is =

Answer 24

(Low Speed = 12.0 to 14.5 Kbits/second).

Question 25

429 can handle _____ receivers for 1 ARINC 429 transmitter

Answer 25

20

Question 26

To eliminate confusion, remember the four formats (BNR, BCD, AIM, & Discrete) are comprised of a ____ word.

Answer 26

32-bit

Question 27

An SDI that is set to “00” represents an:

Answer 27

“All Call” situation / all receivers “listen”

Question 28

• AIM format is used for systems that require:

Answer 28

large amounts of data transfer.

Question 29

Discrete word format is used to:

Answer 29

transmit the status of several individual components of a system or systems.

Question 30

The ARINC 629 data bus has several major improvements over other data bus systems.
For instance, there is substantial weight savings, bi-directional and can accommodate up to:

Answer 30

120 receiver/transmitters on each bus.

Question 31

ARINC 429
uses ____ for logic level changes

Answer 31

voltage

Question 32

ARINC 629
Faster speed at Speed =

Answer 32

2 megabits per second.

Question 33

ARINC 629
• Uses _____ for logic level changes

Answer 33

Current

Question 34

ARINC 629
Employs an inductive coupling unit to connect each LRU to the data bus which means:

Answer 34

easy connection, no broken wires thus improving bus reliability.

Question 35

Terminal Gap
TG determines the:

Answer 35

transmission priority for each LRU

Question 36

Synchronization Gap (SG) can be thought as a:

Answer 36

“reset” signal

Question 37

Transmit Interval (TI) inhibits a:

Answer 37

second transmission from the same user until after the TI time period

Question 38

First, each of the other transmitters on that bus are is inactive until the:

Answer 38

TG time for the transmitting transmitter is complete.

Question 39

Second, each LRU can only make one transmission then must:

Answer 39

wait until after the SG occurs before a second transmission can be made.

Question 40

Third, the LRU can only make one transmission per each TI, the LRU will not:

Answer 40

transmit until after the preset TI time has expired

Question 41

Attenuation occurs when the:

Answer 41

digital signal becomes weak or the transmitted voltage becomes too low.

Question 42

Interference occurs when an:

Answer 42

unwanted signal is induced into the bus wiring, inhibiting data transmission

Question 43

A bus analyzer is often used to capture a:

Answer 43

stream of data being transmitted between digital devices for evaluation.

Question 44

Fiber optic cable con:

Answer 44

1. Specialized tools required.

Question 45

The commercial standard bus system operates at a slow speed of:

Answer 45

12.5 Kbits/second.