AET Digital Electronics and Microprocessors 2

Question 1

An ADC (Analog-to-Digital Converter) performs which conversion in avionics systems?

Accepted Answer

Converts analog signals to digital signals

Answer

Converts digital signals to analog signals

Answer

Converts AC voltage to DC voltage

Answer

Converts binary to hexadecimal notation

Question 2

The ARINC 429 data bus used in commercial aviation is best described as a:

Accepted Answer

Single-transmitter, multiple-receiver unidirectional bus

Answer

Multi-transmitter, multi-receiver bidirectional bus

Answer

Multi-transmitter, single-receiver unidirectional bus

Answer

Bidirectional point-to-point serial bus

Question 3

What does CRC stand for in the context of digital data communications?

Accepted Answer

Cyclic Redundancy Check

Answer

Clock Rate Control

Answer

Circuit Reset Command

Answer

Carrier Reference Clock

Question 4

How many discrete digital output values can a 12-bit ADC produce?

Accepted Answer

4,096

Answer

1,024

Answer

2,048

Answer

8,192

Question 5

PWM (Pulse Width Modulation) is used in avionics primarily to:

Accepted Answer

Control motors and actuators by varying the duty cycle

Answer

Modulate radio carrier frequencies

Answer

Synchronize multiple ARINC data buses

Answer

Provide power line communication between LRUs

Question 6

Which type of data transmission sends bits one at a time sequentially over a single channel?

Accepted Answer

Serial transmission

Answer

Parallel transmission

Answer

Synchronous burst transmission

Answer

Multiplex transmission

Question 7

What is the output of an XOR gate when both of its inputs are logic HIGH?

Accepted Answer

LOW

Answer

HIGH

Answer

Undefined — depends on propagation delay

Answer

Depends on the clock signal