100%(2)2 out of 2 people found this document helpful
This preview shows page 5 - 8 out of 10 pages.
ans: b- What type of emission is frequency modulation? a. F3E b. G3E c. A3E d. B3E ans: a- AM transmission power increases with ________. ans: d- ________ locks the FM receiver to a stronger signal. - What is the highest percentage of modulation for AM? - In FM, the Carson's Rule states that the bandwidth is equal to twice the sum of the modulating frequency and _______. a. carrier signal b. modulating index c. frequency deviation d. image frequency ans: c- What is the carrier swing of an FM transmitter when modulated by 75 %? - The modulation system inherently more resistant to noise. ans: b- Subcarriers that are arranged so that the channels occupying adjacent frequency bands with some frequency space between them is known as ans: a- Modulation of an RF carrier results in a. multiple channels b. smaller antennas c. directional propagation
d. all of the above ans: d- A process which occurs in the transmitter. ans: b- A process which occurs in the receiver. - One part of the transmitter that protects the crystal oscillator from "pulling". - What aspect of the carrier is changed by modulation? a. Frequency b. Phase c. Amplitude d. Depends on the type of modulation ans: d- The amplitude of a sine wave which is modulated by a musical program will - What will be the result of the gain level being too high for signals entering the modulator? - Amplitude modulation causes the amount of transmitter power to - When a carrier is modulated 100%, the total power increases by what percentageover that of the carrier alone? a. 25 % b. 50 % c. 75 % d. 100 % ans: b- When the amplitude of the modulating voltage is increased for AM, the antenna current will
a. increase b. decrease c. remain constant d. decrease exponentially