30 Questions
What is the purpose of ASCB terminators?
To absorb signals and prevent reflection
What type of cable is used in the Local Area Network?
Thin coaxial cable
What is the function of the NIC in the LAN?
To control data transmission on the LAN
What is the purpose of the LAN?
For development, maintenance, and software loading
What protocol is used in the LAN?
Transfer Control Protocol/Internet Protocol (TCP/IP)
What is the frequency of operation of the CAN bus?
500 kHz
What is the primary purpose of the Avionics Standard-Communication Bus (ASCB)?
To provide a primary communications path between major subsystems of the avionics systems
What is the speed of the Avionics Standard-Communication Bus (ASCB)?
10 Mb/s
What is the purpose of the resistor terminations in the ASCB?
To prevent signal reflections
What is the duration of each data frame in the ASCB?
12.5 mS
What is the purpose of the master network interface controller (NIC)?
To synchronize the transmission timing across each bus
What is the purpose of the transformer coupler in the bus coupler?
To prevent a short circuit on one bus from having an effect on the other buses and to impedance-match the ASCB and the applicable NIC
What type of communication does the CAN bus use?
Synchronous
What determines which node gets access to the CAN bus in case of multiple nodes trying to transmit at the same time?
Arbitration ID
What is unique to each frame transmitted on the CAN bus?
Arbitration ID
What happens when multiple nodes try to transmit a message on the CAN bus at the same time?
The node with the highest priority gets bus access
What is checked by a CAN node before transmitting data?
Bus availability
What feature does the CAN specification include for error checking?
Error checking on each frame's contents
What is the purpose of the Linear Variable Differential Transformers (LVDTs)?
To provide analogue feedback to the Primary Actuator Control Electronics (P-ACE) System
What bus is used to send digital feedback data from the Primary Actuator Control Electronics (P-ACE) System?
Controller Area Network (CAN) bus
What is the primary function of the Flight Control Module (FCM)?
To transmit commands to the Primary Actuator Control Electronics (P-ACE) module
What is the purpose of the two AIOP modules in each channel?
To ensure the servos in that channel are active and engaged
What is the source of yaw damper and turn coordination signals?
Flight Guidance Control System (FGCS)
What is the function of the Avionics Standard-Communication Bus (ASCB)?
To collect data from avionic and flight control systems
What advantage does AFDX technology provide in terms of system architecture?
Flexibility for future developments
What is the primary function of AFDX switches in the ADCN?
To manage data traffic on the network
What is the term 'full-duplex' referring to in the context of AFDX cables?
Simultaneous transmission and reception on the same link
What is the composition of an AFDX cable?
One pair of wires for transmission and one pair for reception
What is the data transmission rate of AFDX technology?
10 Mb/s and 100 Mb/s
What is a key advantage of AFDX technology in terms of physical design?
Less wiring
Learn about the Avionics Standard Communication Bus (ASCB), a high-speed serial data bus used in avionics systems, its transmission timing and data frame structure. Understand the role of NICs in controlling the transmission timing.
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