Data Transmission Signals

Advantages of digital signal transmission compared to analog signal transmission

• • Easily compresses data, so it can be transmitted using a small bandwidth.

  
  

• Error performance is significantly improved by signal amplification devices.

• Less expensive because there is no need to convert the signal to analog before transmission.

• All of the above answers are correct.

Disadvantages of digital signal transmission.

• Digital data is more susceptible to noise than analog data during transmission.

• Computer components during transmission are unreliable.

• Information often exists in analog form, converting to digital bits is expensive and can cause additional points of failure.

• Digital signal transmission requires greater bandwidth than analog signal transmission.

Which of the following types of interference is not listed as an external interference source?

• Electromagnetic interference (EMI)

• Other interference signals from other devices

• Loose connector

• Thunderstorm

What is the main purpose of pulse output?

• Provide stable power supply

• Control engine speed

• Send data continuously

• Read sensor value

Among the mentioned transmission signal encoding methods, which type does NOT require converting the signal to bit form?

• Digital modulation

• AM radiation

• FM radiation

• All of the above answers are correct

What are the main foundations of digital networks compared to analog networks?

• Outstanding sound quality

• High-speed data processing ability

• Ease of upgrade and management

• All of the above answers

What is the biggest challenge of A/D conversion?

• Complexity of electrical circuits

• Balance between accuracy and speed

• Reduced signal quality

• Cost of equipment

In what cases is serial data transmission more efficient than parallel data transmission?

• Need to transmit a large block of data in the shortest possible time.

• Short transmission distance and low cost.

• Need to ensure high accuracy for each bit of data.

• Limited bandwidth and prone to interference.

By definition, the bandwidth of an analog signal is equivalent to:

• Anti-interference ability of the signal.

• Total number of bits that can be transmitted per second.

• The speed at which bits move along the transmission line.

• The distance between the lowest and highest frequencies of the signal.

When modulating a signal digitally, data is encoded as:

• Electrical pulses have a definite length and distance.

• Electric current moves continuously at different intensities.

• The frequency of the carrier varies depending on the data.

• Phase change of the carrier wave according to data bits.