Exam 5: Frequency Modulation: Transmission

Carson's rule is:

Which of the following is indirect FM generation?

The modulation index that occurs when the deviation and intelligence frequencies are maximum is called:

In a stereo FM broadcast transmitter, when the 38 kHz pilot carrier is mixed with the L-R signal, what is produced?

The standard time constant used for pre-emphasis in a non-Dolby system is:

The modulation index is:

An FM signal has an intelligence frequency of 5 kHz and a maximum deviation of 30 kHz. Its index of modulation is:

A stage that produces a specific dc output voltage level based on the exact frequency of the input signal is known as:

The first working FM system was developed by:

Narrowband FM stations:

The main purpose of pre-emphasis and de-emphasis networks in FM communication systems is to:

A phase modulator can be made to create FM indirectly by:

FM systems utilizing a direct FM modulator with an automatic frequency control (AFC) are known as:

In an FM modulator, the amplitude of the intelligence signal determines the:

Determine the worst case output signal-to-noise ratio for a broadcast FM receiver with a maximum deviation of 75 kHz and a maximum intelligence frequency of 15 kHz if the input signal-to-noise ratio is 2:1.

Standard FM broadcast stations use a maximum intelligence frequency of:

The most important advantage of FM over AM is:

Determine the worst case output signal-to-noise ratio for a broadcast FM receiver with a maximum deviation of 75 kHz and a maximum intelligence frequency of 15 kHz if the input signal-to-noise ratio is 3:1.

The amount of frequency deviation is proportional to the amplitude of the intelligence signal in:

Which of the following is not an example of a direct FM modulator?