Welcome to your Communication Sytems
What radio frequencies are most affected by lightning or static waves?
White noise has _______ power spectral density.
Man-made noise is caused by
Is the reduction of signal amplitude as it passed over the transmission medium?
A passive circuit, usually consisting of capacitance and/or inductance, that is inserted in series with the a-c power cord of an electronic device which allow the 60-Hz current to pass and suppressed high frequency noise components.
The term angular velocity as applied to electronic system refers to the number of:
One of the following type of noise becomes of great importance in high frequencies. It is the
Which of the following organizations does not maintain standards for communication systems?
Which of the following is not a duplex type communication system?
A passive circuit, usually consisting of capacitance and/or inductance, that is inserted in series with the a-c power cord of an electronic device which allow the 60-Hz current to pass and suppressed high frequency noise components.
A portion in a communications system, which processes the information so that it will become suitable to the characteristic of the transmission medium
Which of the following items need not be checked with receivers?
The velocity of sound in dry air medium is 331.45 m/s. Calculate the velocity if there is an increase of temperature equal to 10 degrees Centigrade
Frequencies that encompass the 300- to 3000-MHz range are under which of the following segments
Convert noise factor of 4.02 to equivalent noise temperature. Use 300 k for environmental temperature
Signal whose physical quantity varies continuously with time
A network that has an input of 75 dB and an output of 35dB. The loss of the network is _____
A system having an input power of 2 mW an output power of 0.8 mW has a loss of:
Wireless local-area networks occupy which of the following segments?
A single measuring circuit having a resistor if 10 kΩ is connected in series with a 0.5 μF capacitor. What is affective bandwidth?
