Frequencies above _____ kHz, are referred to as the radio frequencies

The frequency interval between two sounds whose frequency ratio is 10

The range of frequencies represented in a signal

Atmospheric noise is less severe at frequencies above

Which of the following is not a simplex communication system?

Wireless local-area networks occupy which of the following segments?

Which of the following limits the performance of a communication system?

Which communication application best describes movies, sports events, and other programs that are distributed to subscribers by fiber-optic and coaxial cable?

The first complete system of wireless communications was provided by

Determine the equivalent noise temperature of a receiver with a noise figure of 4 dB at 300 K environment temperature.

Thermal noise in the communication system due to thermal electrons

Which of the following is not a duplex type communication system?

_____ frequencies are exact multiples of the fundamental frequency.

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 _____

What radio frequencies are most affected by lightning or static waves?

The frequency band normally used to penetrate ocean depths and therefore used for communicating with submarine is ________.

A system having an input power of 2 mW an output power of 0.8 mW has a loss of:

Noise figure is a parameter that represents a ______ of the system

The value of a resistor creating noise is doubled. The noise power generated is therefore