ECE 102 Quiz on Noise

The noise figure of a totally noiseless device is

• unity

• infinity

• zero

• 100

Indicate the noise whose source is in a category different from that of the other three.

• Solar

• Cosmic

• Atmospheric

• Galactic

The following characteristics of noise except

• Unwanted energy

• Predictable in character

• Present in the channel

• Due to any cause

When dealing with random noise calculations it must be remembered that

• all calculations are based on peak to peak values

• calculations are based on peak values

• calculations are based on average values

• calculations are based on RMS values

Which of the following is the most reliable measurement for comparing amplifier noise characteristics?

• signal-to-noise ratio

• noise factor/figure

• shot noise         

• thermal noise agitation

So called "1/f" noise is also called:

• random noise     

• pink noise

• white noise

• partition noise

The formula used to measure the total noise figure due to amplifiers in cascade is called ___

• Johnson’s Formula

• Shannon’s Formula

• Hartley’s Formula

• Friis’ Formula

Noise uniformly distributed over the voice frequency band is called ____ noise.

• impulse

• quantizing

• intermodulation

• white

The rate at which information can be carried through a communication channel depends on

• carrier frequency

• bandwidth

• transmission loss

• transmitted power

The correct symbol for decibel is

• DB

• dB

• Db

• db