Podcast
Questions and Answers
What is the primary reason why a signal loses energy as it travels through a medium?
What is the primary reason why a signal loses energy as it travels through a medium?
- The signal overcomes the resistance of the medium. (correct)
- The signal is amplified by the medium.
- The signal is converted to heat.
- The signal is distorted by the medium.
What is the unit of measurement used to show the relative strengths of two signals or one signal at two different points?
What is the unit of measurement used to show the relative strengths of two signals or one signal at two different points?
- Decibel (correct)
- Volt
- Ampere
- Watt
What is the result of a signal being attenuated?
What is the result of a signal being attenuated?
- The signal loses energy. (correct)
- The signal is amplified.
- The signal remains unchanged.
- The signal is distorted.
What is the purpose of amplifiers in signal transmission?
What is the purpose of amplifiers in signal transmission?
What is the formula to calculate the decibel (dB) of a signal?
What is the formula to calculate the decibel (dB) of a signal?
What is the meaning of a negative decibel (dB) value?
What is the meaning of a negative decibel (dB) value?
What is the result of a 3 dB loss of power in a signal?
What is the result of a 3 dB loss of power in a signal?
What is the unit of measurement used to define the loss in a cable?
What is the unit of measurement used to define the loss in a cable?
What is the power of the signal at 5 km if the signal at the beginning of a cable has a power of 2 mW and the loss in the cable is -0.3 dB/km?
What is the power of the signal at 5 km if the signal at the beginning of a cable has a power of 2 mW and the loss in the cable is -0.3 dB/km?
What are the three causes of impairment in signal transmission?
What are the three causes of impairment in signal transmission?
