Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Mod 5 > 5.4 > Flashcards

5.4 Flashcards

1
Q

What data rate does the ARINC 629 data bus have?

A

2 megabits per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How much faster is a ARINC 629 compared to the ARINC 429?

A

The ARINC 629 is 20 times faster

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many terminals can the ARINC 629 data bus handle?

A

120

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How many terminals can the ARINC 429 data bus handle?

A

20

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Explain Simplex?

A

transmission can only flow in one direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Explain half duplex?

A

One transmitter one receiver, transmission can flow in both directions but ONLY one at a time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Explain full duplex

A

One transmitter, one receiver and the transmission can flow in both directions at the SAME time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What type of bus is an ARINC 429?

A

It is a simplex bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are other names for ARINC 429?

A

Shout or broadcast bus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A twisted, Shielded pair of wires carries the ARINC signal, transmitting info at periodic intervals, true or false?

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What indication is used for error detection and accurate data reception for ARINC 429 buses?

A

Odd Parity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How many transmitters and receivers can an ARINC 429 databus have?

A

1 Transmitter and up to 20 Receivers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A receiver is allowed to respond on the same bus where a transmission has occurred, True or false?

A

False, A receiver is NEVER allowed to respond on the same bus where a transmission has occurred

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

An LRU on the ARINC 429 bus does not have an address, True or False?

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the advantages of serial transmission?

A

Only a single line is required for transmission.
Only one set of digital circuitry is needed to process the data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is slower? Parallel transmission or Serial transmission.

A

Serial transmission is slower than Parallel transmission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What are the two different transmission speeds for ARINC 429?

A

Low-Speed (LS BUS) (12-14 kbit/s)
High-Speed (HS BUS) (100 kbit/s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How many bits words does an ARINC 429 produce?

A

32 Bit words

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How do bit words in an ARINC 429 get separated?

A

They are separated by at least four bit times of null (Zero volts)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is Binary Coded Decimal (BCD) data used for and how often is it transmitted?

A

Used for displays ONLY and transmitted twice per second on average

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Binary (BNR) is processed by other LRU’s, how often must it be transmitted?

A

6 to 20 times a second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are the five parts of the ARINC 429 Data word format?

A

Eight-bit label, which is encoded to represent the type of information the word contains

Source/Destination Identifier (SDI), comprised of bits 9 and 10

Sign/Status Matrix (SSM) – comprised of bits 30 and 31 for BCD data words, and bits 29, 30, and 31 for BNR data words

Parity check for the odd parity bit

Date field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

In which bit can you find equipment identifiers?

A

In bits 9 and 10

24
Q

The Most Significant Bit (MSB) of the actual label is in the Least Significant Bit (LSB) of the ARINC 429 word and is transmitted last onto the bus ,True or false?

A

False, The Most Significant Bit (MSB) of the actual label is in the Least Significant Bit (LSB) of the ARINC 429 word and is transmitted first onto the bus

25
How many bits of a word does a label take and how is it coded?
A label takes the first eight bits and is Octal coded
26
What is the source destination identifier function?
When it is necessary to indicate the source of information. When the information is directed to a specific location
27
The signal carried by each word is accompanied by two other pieces of information?
Validity and Complementary information
28
What is a parity check?
The receiver uses a parity bit to ensure the different bits forming the word have all been completely and correctly transmitted.
29
What is the purpose of a parity check?
It is used to increase transmission security
30
In a Parity check After the rest of the word has been assembled, the total number of 1s is counted, if the number of 1's is even, bit 32 is set as what?
1
31
In a Parity check After the rest of the word has been assembled, the total number of 1s is counted, if the number of 1's is odd bit 32 is set as what?
0
32
ARINC 629 allows how many devices to share a bi direction serial data bus?
120
33
How long can a ARINC 629 be?
it can be up to 100m long
34
What two forms can an ARINC 629 databus be in?
The data bus can be either a twisted pair or a fibre-optic cable.
35
What components are included in all LRUs?
Serial interface modules Terminal controllers
36
What Characteristics does the ARINC 629 have?
LRUs send data one at a time, in sequence LRUs receive data at the same time
37
What is the Serial interface Module (SIM) used for?
The SIM makes the transmit and receive channel selection
38
In an ARINC 629 message how many word strings can it have?
Up to 31 word strings
39
what is the time gap between each word string in an ARINC 629 message?
There is a four bit time gap between each word string
40
A word string begins with what?
A label
41
A word string has up to how many words?
256
42
The minimum length message has one label and no data words, The maximum length message has 31 labels with 256 data words following each label, and 30 time gaps of four bits each. True or False?
True
43
What are the disadvantages of ARINC 429?
Uses point to point which means each LRU needs a separate wired connection to every other LRU it communicates, which increases the weight. When a new system is installed it requires new wiring to connect to all other systems with which it needs to communicate.
44
What can get rid of the disadvantages of ARINC 429 and how?
Basic Ethernet solves it and can transfer data up to 10 Mbit/s, it has a main bus cable to which each LRU connects via stub cables
45
What is an ethernet advantage?
It has a multiaccess structure meaning any LRU can communicate with another along the same bus.
46
47
ARINC 429 and 629 do not have addresses, True or False?
True
48
What is Carrier sense?
The carrier sense ensure that before any LRU transmit data it listens to the data bus to ensure no other LRU is transmitting
49
Multiple access what is it?
Any LRU can communicate with any other LRU along the same bus
50
CSMA is what?
It’s how the Ethernet protocol regulates communication across the nodes
51
In regards to Basic Ethernet with Carrier sense multiple access with collision detection what happens if a large number of computers are connected on the network?
Increases delayed and therefore slows the transmission rates due to having to wait for the data bus to be free to transmit
52
How can delay problems be prevented?
Through a switched Ethernet topology by controlling data transfers using routers and switches. The routers and switches are programmed to know which LRUs are connected to them.
53
Does the ARINC 429 have an address?
No
54
LRUs have equipment numbers which are further grouped into equipment or system types, true or false?
True
55
Is ARINC 429 a parallel or serial transmitter?
Serial
56

Mod 5 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions