Advertisements
Advertisements
प्रश्न
State any two types of modulation
उत्तर
The two types of modulation are
1) Amplitude modulation (AM)
2) Frequency modulation (FM)
APPEARS IN
संबंधित प्रश्न
Define modulation index.
Why is Modulation index kept low?
The carrier wave is represented by
Define the term modulation. Draw a block diagram of a simple modulator for obtaining AM signal ?
In the block diagram of a simple modulator for obtaining an AM signal, shown in the figure, identify the boxes A and B. Write their function.
In the given block diagram of a receiver, identify the boxes labeled as X and Y and write their functions.
Broadcasting antennas are generally ______.
An audio signal of 15kHz frequency cannot be transmitted over long distances without modulation because ______.
- the size of the required antenna would be at least 5 km which is not convenient.
- the audio signal can not be transmitted through sky waves.
- the size of the required antenna would be at least 20 km, which is not convenient.
- effective power transmitted would be very low, if the size of the antenna is less than 5 km.
A 25 m long antenna is mounted on an antenna tower. The height of the antenna tower is 75 m. The wavelength (in meter) of the signal transmitted by this antenna would be ______.
A transmitting antenna has a height of 320 m and that of receiving antenna is 2000 m. The maximum distance between them for satisfactory communication in line of sight mode is 'd'. The value of 'd' is ______ km.
