The aviation industry uses various digital data transmission standards which are applied in the aviation industry. To efficiently transmit analog and digital signals from the transmitter to the receiver system, the computer systems are expected to share a common language determined by set standards. For example, the military aircraft uses standards defined by MIL-STD, meaning military standards. However, the aviation industry has innovated various data transmission standards that can be employed in digital data transmission.
Bus couplers are used as transformer interface, isolation resistor, and shielding. An example of a coupler is the 1553 stub coupler, a design made to connect several devices in the system via a redundant, deterministic bus driver: the coupler and the other components by stubs which are tributaries. Coupling boxes also offer connections between the studs for the remote terminals, bus monitors, and bus controllers. Between the coupler and the data, the bus is two connectors. Additionally, couplers contain one or more stub connections that remain free when the coupler is not being utilized. When the couple is positioned at the end of the terminator, it terminates the bus by connecting to a termination resistor.
MIL-STD Transmission Standards
The military standards-1553 were set in 1973 by the US Department of Defense. The standards emphasized the definition of electrical, functional, and mechanical properties of the serial data bus. The first designs were meant to be used in avionics but later extended to handle onboard spacecraft data for military and civil standards. Finally, in 1975 and 1978, MIL-STD-1553A and MIL-STD-1553B were developed. The major difference between these two models and the initial design is that the user was given a chance to define their options.
Key Elements of the MIL-STD-1553
- The Bus Controller
This part is essential for controlling data flow and any transmissions that take place on the bus. In addition, it is a crucial source of communication used by the system for giving commands and receiving responses.
- Remote Terminal
The main function of the remote terminal is to ensure data in and data out of the subsystem. In addition, the remote terminal has very intelligent sensors that can provide backup to the bus controller in case there are no other computers.
- Bus Monitor
This component is responsible for data collection and listening to messages transferred from the data bus.
- Data bus and Databus couple
The military standard MIL-STD-1553 was established to define the mechanical, functional, and electrical characteristics of the serial data bus in the avionic data bus. The internal termination of the 1553 coupler can be configured. It connects six studs to various terminals by tributaries. Therefore, the technology used in the digital data transmission can be applied in evaluating hardware samples to determine the wiring faults in an aircraft.