ANALOG
COMMUNICATIONS
- 1. The communication channel is the medium by which the electronic signals is transmitted
- 2. At low frequencies radiation is poor and signal gets highly attenuated
- 3. In pulse modulation the carrier consist of a periodic sequence of rectangular pulses
- 4. Another way to produce angle modulation is Phase Modulation
- 5. The group modulator provides four carriers at 84khz, 96khz, 108khz and 120khz
- 6. In switching modulator multiplication operation is replaced by simple switching operation
- 7. When two signals passed through a Non-Linear resistance, the AM signal is generated with suppressed carrier
- 8. The generation and reception of SSB signal is a complex process
- 9. Filter methods are Bulky
- 10. Phase modulation is defined as the method of Angular Modulation
- 11. The sideband distribution is Symmetrical
- 12. In AM, the sidebands power and total transmitted power increases with the Depth Of Modulation
- 13. The main requirement of the frequency modulator is Variable O/P Frequency
- 14. The Foster-Seeley descriminator is Sensitive to input amplitude
- 15. The phase locked loop is a Negative Feedback system
0 comments:
Post a Comment