Digital Data Transmission

What is the primary purpose of the wiring used to transmit data?

To switch a transistor ON or OFF

What is the ideal current flow on a digital data line?

No current flow

What is the typical voltage of the electrical signal transmitted over data bus lines?

5-V DC

What does the digital signal transmitted over data bus lines represent?

Encoded data as 1s and 0s Signup and view all the answers

What is the shape of an ideal digital waveform?

Square wave Signup and view all the answers

What is the purpose of the computer processors at either end of the data transmission?

To decode and utilise the data to produce the desired outputs Signup and view all the answers

What is the maximum number of data words that can be sent in the BC-RT message?

32 Signup and view all the answers

What is the response of the remote terminal after validating the command word and all data words in the BC-RT message?

It issues a status word indicating the message was received and was valid Signup and view all the answers

What is referred to as a transmit command in the RT-BC message?

The remote terminal sending data to the bus controller Signup and view all the answers

What is the purpose of the RT-RT command?

To allow a terminal to transfer data directly to another terminal Signup and view all the answers

What is the primary benefit of using ARINC 429 for avionics equipment manufacturers?

To produce standard products that can be used in various aircraft Signup and view all the answers

What is the word size of the ARINC 429 data bus?

32 bits Signup and view all the answers

What type of encoding does the ARINC 429 data bus use?

Bipolar return to zero Signup and view all the answers

What is the maximum number of receivers allowed on an ARINC 429 data bus?

20 Signup and view all the answers

What is a characteristic of the ARINC 429 data bus?

Simplex data bus with one transmitter and multiple receivers Signup and view all the answers

What is the primary function of the label in an ARINC 429 message?

To determine the data type and parameters associated with it Signup and view all the answers

What is the purpose of the Source/Destination Identifier (SDI) in an ARINC 429 message?

To identify the source and destination of the transmission Signup and view all the answers

How many receivers can be connected to a single ARINC 429 transmission?

Up to 20 receivers Signup and view all the answers

What is the format of the label in an ARINC 429 message?

Octal number Signup and view all the answers

What is a characteristic of ARINC 429 data formats?

Some formats are non-standard Signup and view all the answers

What is the maximum number of word strings a message can have in the ARINC 629 system?

31 Signup and view all the answers

What is the function of the Pre-Sync Sync Pulse (PSSP) in the ARINC 629 system?

To synchronize the sender and receiver Signup and view all the answers

What is the structure of a label word in the ARINC 629 system?

12-bit label field, 4-bit label extension, a single parity bit, and a 3-bit time hi lo sync pulse Signup and view all the answers

What is the purpose of the Terminal Gap (TG) in the ARINC 629 system?

To separate messages Signup and view all the answers

What is the structure of a data word in the ARINC 629 system?

20-bit word Signup and view all the answers