3272-5 (5.5)

ARINC 629 is transmitted using. fibre optics or twisted pair of wires. SWG 28 wire. single wire for each transmitter.

A simplex system has. 1 transmitter and multiple receivers. 1 bus controller and 1 remote terminal. 1 bus controller and multiple receivers.

To create a bi-directional communications link within an ARINC 429 system. four databuses are required. only one databus is required. two databuses are required.

Why does an ARINC databus system send data to LRUs in series?. Saves weight. More information can be sent. Takes less time.

Can an LRU transmit and receive on more than one 629 bus?. Yes. Only if paralleled. No.

ARINC 629 LRUs transmit. when addressed. when signal gap is sensed. when terminal gap is sensed.

An ARINC 429 BCD word occupies bits 11-29, if 11-15 are filled with padders then the LSB of the word will be. 11. 16. 29.

A simplex system has. one transmitter, many receivers. a bus controller and separate controller. one transmitter, one receiver.

In an Arinc 429 Word label-representing heading is 320, this is represented in bits 1- 8 as. 01011001. 00001011. 01101000.

In ARINC 629 aperiodic mode, LRUs transmit in order of. longest terminal gap to shortest terminal gap. power up. shortest terminal gap to longest terminal gap.

How is ARINC 429 bi-directional data transfer achieved?. Via a current mode coupler. Using two data buses. Via a twisted pair of shielded cables.

The data format use to transmit signal to flight data recorder. Harvard bi-phase 12 bit. Bi-Polar RZ 12 bit. Manchester 2 bi-phase 12 bit.

The output voltage of ARINC 429 signal is. -5v. +10v to -10v. +5v.

An ARINC 629 label word is. 10 bits. 12 bits. 8 bits.

The T/R of ARINC 629 is. Encoder / decoder. Multiplex / demultiplex. switching.

Terminal gap in ARINC 629. is always the same period. is flexible. can be changed by adjusting the rx/tx software.

How does ARINC 629 bus transmit and receive information?. Sockets and pins. Inductive coupling. Optical coupling.

What is ARINC 561 used for?. To specify Radio Comms data bus. To specify Flight Data Recorder data bus. To specify LRU pin-outs.

What is the purpose of the parity bit on an ARINC 429 bus?. To indicate if the data is analogue. To indicate that the data is digital. To indicate to the receiver that the data is valid.

ARINC 429 is. Single Source Multiple Sink System. Multiple Source Multiple Sink system. Single Source Single Sink system.

What is the purpose of intermediate production breaks in ARINC 429 or 629 Data cables?. Cables are only manufactured 40 feet long. To allow maintenance personnel to divide the right and left system buses into two parts for easy removal and installation. To allow connection of new cables to the existing ones in case of a modification.

Where is the parity bit installed in a data word?. Front. End MSB. Middle.

RZ bi-polar modulation consists of bits which are one of __________ states?. Eight. Two. Three.

In the ARINC 429 digital information transfer system, data may travel in: both directions on the same bus simultaneously. one direction only. both directions on the same bus sequentially by time multiplexing.

An ARINC 629 data word. includes an 8 bit label and a 16 bit data field. has only 20 bits. comprises up to 256 data bits.

In an ARINC 429 digital word bit number 32 is used for. terminating the data field. checking parity. identifying word type.

What connects an LRU to the Bus Coupler in an ARINC 629 Data Bus?. Patch Cord. Stub Cable. Interconnect Cable.

A 12 bit 16 Channel encoder will use a multiplexer with. 3 bit parallel address line. 2 wire series address line. 4 bit parallel address line.

How many address lines would be needed for an 8 line MU?. 2. 4. 3.

In a MU, how is parallel converted to serial?. By way of a shift register. By way of an encoder. By way of a demultiplexer.

A multiplexer. takes many signals in and converts it to a serial transmission output. takes many signals in and puts these in a parallel transmission on the output. takes one signal in and converts it to a parallel transmission output.

A multiplexer in test equipment could be used for. frequency divider. analogue to digital converter. digital to analogue converter.

An 8 data input multiplexer has how many Data Select lines?. 8. 3. 2.

The signal sent between a MU/DEMU is controlled by. clock. the ALU. control unit.

Some of the advantages of fibre optic cable over copper cables are. non conductive, easy to manufacture and assemble, more robust, cheap. non conductive, smaller in size and weight, easy to manufacture and assemble and higher security. smaller in size and weight, non conductive, higher security and higher bandwidth.

A fibre optic cable consists of. a silica glass core with a cladding having a lower refractive index. a silica glass core with a cladding having a higher refractive index. a plastic core with a cladding having a higher refractive index.

Fibre optic cables. are immune to EMI. attenuate EMI. are susceptible to EMI.

Two connected fibre optic cable ends are parallel but not quite touching. This is called. end to end coupling. lens connector. end fire coupling.

A disadvantage of a fibre optic cable is. couplings susceptible to ingress of fluid. end terminals are susceptible to environmental contamination. shallow bend radius allowed.

What kind of light is used in a fibre optic systems?. Infrared. Visible. Ultraviolet.

Fibreoptic data is sent by. modulating the frequency of a laser beam. modulating the frequency of a filament beam. a strobe light.