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B2 MODULE 5 > Subsection 04 Data Buses > Flashcards

Subsection 04 Data Buses Flashcards

1
Q

A bus which supports the transfer of data in both directions is referred to as?

A

Bidirectional

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2
Q

A current mode coupler contains an E-core assembly, the purpose of the E-core is?

A

To couple the signal to the data bus

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3
Q

A data frame on an ethernet system contains?

A

Both source and destination addresses

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4
Q

A deterministic ADN used on a certified integrated modular avionic system must have a BIT error rate ( BER) of no more than?

A

1 in 10 to the -12

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5
Q

A group of BITS transmitted at the same time is?

A

Parallel data

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6
Q

A signal in an ARINC-629 system uses?

A

A twisted pair of wires or fibre optics

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7
Q

A simplex system has?

A

1 transmitter and multiple recievers

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8
Q

A simplex system has 1 transmitter and ?

A

Many recievers

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9
Q

A terminal controller will transmit?

A

Only once during each transmit interval

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10
Q

A virtual link in an ADCN is?

A

Unidirectional

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11
Q

An active AFDX subscriber, connected to an AFDX network to communicate with other subscribers respecting AFDX rules is called?

A

An end system

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12
Q

An aircraft databus system can use both ARINC-629 and ARINC-429 via?

A

System card files and signal gateways

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13
Q

An ARINC-429 BCD word occupies BITS 11-29, if 11-15 are filled with padders then the LSB of the word will be?

A

16

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14
Q

An ARINC 429 binary coded decimal (BCD) word occupies word bits?

A

11-29 (BCD is 11-29 BINARY is 11-28)

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15
Q

ARINC-429 bus uses?

A

A twisted shielded pair of wires

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16
Q

An ARINC-429 system uses a 32 word over?

A

A twisted pair of wires

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17
Q

ARINC 429 word label format is?

A

OCTAL

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18
Q

ARINC 573 data buses are used to input a?

A

DFDR

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19
Q

ARINC 629 bus cable is a twisted pair of wires with?

A

A 130 ohm resistor at each end

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20
Q

ARINC 629 characteristics is that data can transmit?

A

In both directions down the data bus

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21
Q

ARINC 629 data word has?

A

Only 20 BITS

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22
Q

ARINC 629 Label word is?

A

12 BITS

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23
Q

An ARINC 629 LRU can?

A

Transmit and receive on one data bus

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24
Q

An ARINC 629 stub cable connects bi-directional data between?

A

The LRU and the current mode coupler

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25
Q

An ARINC data word is BITS 11-29, if BITS 11-18 are patched which of the following would be the LSB BIT?

A

19

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26
Q

An avionics data communications network (ADCN) uses ?

A

Two active parallel identical networks

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27
Q

An in-series ARINC 429 system transmits using?

A

Time division multiplexing

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28
Q

ARINC 429 data bus systems use?

A

Binary coded decimal BCD

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29
Q

ARINC 429 has low BIT rate of?

A

80 milliseconds

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30
Q

ARINC 429 is?

A

SIMPLEX

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31
Q

ARINC 429 is a?

A

Single source multiple sink system

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32
Q

ARINC 429 null state is represented by a voltage of?

A

0v

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33
Q

ARINC 429 SDI word format is at BITS?

A

9-10 ( source destination ident )

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34
Q

ARINC 429 slow speed transmission is?

A

80 microseconds

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35
Q

ARINC 573 is related to the?

A

FDR system

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36
Q

ARINC 629 current mode couplers are?

A

INDUCTIVE

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37
Q

ARINC 629 databus cables are terminated using?

A

130ohm resistors

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38
Q

ARINC 629 is

A

One bus, bi directional flow

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39
Q

ARINC 629 is two cables..

A

Bi-directional

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40
Q

ARINC 629 is transmitted using?

A

Fibre optics or twisted wire pair

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41
Q

ARINC 629 is used for?

A

Normal flight

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42
Q

ARINC 629 is

A

Half duplex data bus

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43
Q

ARINC 629 LRU’s transmit when?

A

Terminal gap is sensed

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44
Q

ARINC 629 periodic mode is used for?

A

Normal operation

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45
Q

ARINC 629 runs at a Baud rate of?

A

2000 kband

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46
Q

ARINC 629 terminal transmit interval is?

A

Common to each terminal

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47
Q

ARINC 629 Aperiodic mode is used for?

A

Database loads

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48
Q

Avionics full duplex switched ethernet (AFDX) utilises?

A

Commercial off the shelf hardware

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49
Q

AFDX data rates are?

A

10-100 Mpbps

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50
Q

AFDX is?

A

Full duplex

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51
Q

AFDX uses a ?

A

Star topology network

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52
Q

AFDX uses ?

A

Copper or fibre optic TX medium

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53
Q

Can an LRU TX and RX on more than one 629 bus?

A

YES

54
Q

Care must be taken when installing ARINC 629 into bus panels, damage to cables can cause?

A

Corrosion of the conductor

55
Q

Communication between an aircraft computer and display symbol generator would use a?

A

Serial bus architecture

56
Q

Data is transferred on the MIL-STD-1553B by?

A

Manchester Bi-Phase

57
Q

Deterministic performance of an ethernet system used for an integrated modular avionic system network is provided by the use of ?

A

Virtual links within the ethernet network system

58
Q

Fibreoptic databus links are?

A

Bi-Directional

59
Q

How are communications controlled on a MIL-STD-1553 databus?

A

Terminals only output data when commanded to do so by the bus controller

60
Q

How are engine indications sent to the FDR?

A

ARINC-573

61
Q

ARINC 629 transmit and receive information by?

A

Inductive coupling

62
Q

How does MIL-STD-1553 put data onto the buses?

A

Through a databus controller

63
Q

How is ARINC 429 bi-directional data transfer achieved?

A

By using two data buses

64
Q

How is data coupled to an ARINC-629 bus?

A

By inductive pickup

65
Q

How is data transmitted on an ARINC 429 bus?

A

Asynchronous and serial

66
Q

How is the word label 206 written in ARINC 429?

A

OCTAL 01100001

67
Q

How many LRU’s can be connected to an ARINC 429 bus?

A

20

68
Q

How many voltage levels does ARINC 429 have?

A

3

69
Q

If an ARINC system uses ODD BIT parity then the binary number 101000111 would be given a parity BIT of?

A

0

70
Q

In aircraft use fibre optic cables should comply with?

A

ARINC 636 standard

71
Q

ARINC 429 digital data word, the source/destination identifier is made up of two BITS positioned at?

A

9-10

72
Q

ARINC 429 Digital word BIT 32 is used for checking?

A

Parity

73
Q

ARINC word label representing heading 320 this is represented in BITS 1-8 as?

A

00001011

74
Q

In an ARINC 429 word what data occupies BITS 9 and 10?

A

SDI ( source destination identifier )

75
Q

ARINC 429 wordstring bits 1-8 represent the?

A

Monitored parameter

76
Q

ARINC 429 data field is BITS 11-28, if bits 11-18 had pad bits the LSB of the data word would be?

A

19

77
Q

ARINC 629 aperiodic mode, LRU’s transmit in order of?

A

Shortest to longest terminal gap

78
Q

In ARINC 629 LRU’s are programmed to transmit?

A

One at a time

79
Q

ARINC 429 digital information transfer system, data may travel in?

A

One direction only

80
Q

Manchester II encodes Logic 1 with a voltage transition from?

A

A high to low state

81
Q

MIL-STD-1533 is a data bus for?

A

Digital information transfer syatem

82
Q

MIL-STD-1533B uses Manchester bi-phase encoding which makes it suitable for?

A

Transformer coupling

83
Q

Normal transmission order of ARINC 629 LRU’s in periodic is in the order of?

A

Power up

84
Q

On an ARINC 629 bus the max amount of current mode couplers per data bus is?

A

120

85
Q

On ethernet EMI can cause?

A

Jitter

86
Q

One of ARINC 429 formats is?

A

BCD

87
Q

Parity BIT for data checking ARINC 429 is on the?

A

LEFT

88
Q

Reliability of data transmission via AFDX is guaranteed by the use of?

A

Virtual links

89
Q

RZ bi polar modulation consists of BIT’s which are?

A

One of three states

90
Q

Terminal gap in ARINC 629 is changed by adjusting the?

A

RX/TX software

91
Q

ARINC 429 data bus word systems use?

A

Binary coded decimal

92
Q

ARINC 429 data word is?

A

32 BITS long

93
Q

The ARINC 429 low rate transmission is 12-14 Kbits/second with a high of

A

100 kbits/second

94
Q

ARINC 429 Low speed data bus transfers data at a rate of?

A

12Khz

95
Q

The ARINC 429 standard uses?

A

ODD parity checking

96
Q

ARINC 429 uses which of the following systems to transfer data?

A

Bi-Polar return to zero

97
Q

ARINC 629 synchronisation gap (SG) is a time period to all users where each transmitter must wait for the SG to elapse before?

A

Making a second transmission

98
Q

The BCD data field of ARINC 429 is contained within BIT’s ?

A

11-29

99
Q

The data format used to transmit a signal to the FDR is?

A

Harvard bi-phase 12 bit

100
Q

Defined standard for deterministic data transfer in a network for safety critical IMA applications is?

A

ARINC 664

101
Q

General arrangement of ARINC 629 includes?

A

Data bus cable, current mode coupler and stub cable

102
Q

The Maximum data rate supported by the FDDI bus is?

A

100Mbps

103
Q

Max data rate supported by MIL-STD-1553 is?

A

1 Mbps

104
Q

Max number of terminals connecting to a MIL-STD-1553B is

A

31

105
Q

The most significant BIT of ARINC 429 word is to the?

A

Left

106
Q

The number of LRU’s which TX/RX on ARINC 429 is dependant upon?

A

Parallel input impedance

107
Q

The output voltage of ARINC 429 signal is?

A

+10v to -10v

108
Q

The parity BIT in digital information is used to?

A

Check the validity of data information

109
Q

The technology used in an integrated modular avionics system to provide the standard of ADCN is called?

A

AFDX

110
Q

The TX/RX of ARINC 629 is?

A

Multiplex/demultiplex

111
Q

ARINC 429 low speed data bus transfers data at a rate of approx.?

A

12 khz

112
Q

To connect an LRU to an ARINC 629 data bus a?

A

Current mode coupler, serial interface module and terminal controller is required.

113
Q

To create a Bi-directional COMS link within a ARINC 429 system?

A

Two data buses are required

114
Q

What are the 3 types of words in the MIL-STD-1553B?

A

Bus command, Status and Data

115
Q

What connects an LRU to the bus coupler in an ARINC 629 bus?

A

A stub cable

116
Q

What is a parity BIT used for on an ARINC 429 bus?

A

Fault/Self check

117
Q

What is ARINC 561 used for?

A

Inertial navigation systems

118
Q

What is ARINC 561 used for?

A

To specify inertial nav data bus

119
Q

What is the encoding method used in ARINC 429?

A

Bi polar RZ

120
Q

What is the highest speed of ARINC 429?

A

100Kbps

121
Q

What is the lower rate “ BIT TIME “ for ARINC 429?

A

80 Microseconds

122
Q

What is the parity bit for on ARINC 429?

A

Checks for corruption during transmission of a word

123
Q

The purpose of intermediate production breaks on ARINC 429/629 cables is to?

A

Allow maintenance personnel to divide LH and RH buses for easy removal/installation

124
Q

What is the purpose of parity bit on ARINC 429?

A

To indicate to the Receiver that the data is valid

125
Q

The slowest speed for ARINC 429 is?

A

12.5Kbps

126
Q

What is used in an ARINC 429 word to check for correctness of sent data?

A

PARITY BIT

127
Q

What limits the number of ARINC 429 receivers on a bus?

A

The parallel input impedance

128
Q

What system uses base 8?

A

ARINC 429

129
Q

Where is the Parity bit installed in a data word?

A

the END MSB

130
Q

Where is the PASS and FAIL of an ARINC 429 code indicated?

A

SSM field

131
Q

Why does ARINC databuses send data to LRU’s in series?

A

Saves weight

B2 MODULE 5 (17 decks)

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