Why higher speed communications in parallel transmission require shorter length?

Aeronautical & Aerospace Engineering : Avionics - Quiz(MCQ)

Cost

Noise

Resistance

Inductive and capacitance effects

Correct Answer : Inductive and capacitance effects

Explanation : As the speed of transmission or the frequency of transmission increases the wavelength of transmission becomes comparable with the length of the data bus. This causes inductive and capacitance effects which degrade the signal.

Recently Updated in Avionics Questions

Which type of architecture uses different storage space for program code and the data?

Split cell architecture

Fragmented architecture

Harvard architecture

Von Neumann architecture

Correct Answer : Option (C) : Harvard architecture

Explanation : In a Harvard architecture microprocessor, there are two memories, a program or instruction memory, usually a ROM, and a data memory, which is a RAM. Also, there are two data paths into and out of the CPU between the memories. Because both instructions and data can be accessed simultaneously, very high-speed operation is possible.

What is the accessibility limitation of only one data or instruction set at a time from the memory called?

Von Neumann limit

Von Neumann bottleneck

Von Neumann speed

Von Neumann limitation

Correct Answer : Option (B) : Von Neumann bottleneck

Explanation : The accessibility limitation of only one data or instruction set at a time from the memory is called as Von Neumann bottleneck. This has the effect of greatly limiting the execution speed.

What is the reason for the need of high speed DSP?

Easily programmable

High sampling frequency

Better processing capabilities

Less power consumption at higher speeds

Correct Answer : Option (B) : High sampling frequency

Explanation : The time taken for input/output and the processing time together must be smaller than the sampling period to ensure the continuous flow of data. Since high sampling frequencies are needed for accurately converting the analog signal to digital, high speed DSP is a must.