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Across 4. The output of a first-order hold circuit is a _____ line 6. In PAM, the amplitude of the pulses of the carrier is varied in accordance with the ______signal. 11. The PAM signal can be detected by _______ (3 Words) 14. In TDM, when the signal pulse allotted to the time slot 1 extends into the time slot 2, it results into ______ 17. The combination of an ideal LPF and equalizer is also known as ______ filter 18. In pulse modulation system, the carrier is a _______ 19. In TDM, the _____ scale is shared by different scale.

Down 1. number of samples required in PM to ensure no loss of information is given by___Theorem 2. A PWM signal can be generated by An ______ multivibrator 3. A PAM modulator circuit is also known as_______ (2 Words) 4. In analog modulation systems, the carrier is a ______ signal. 5. A ______ circuit is used to recover the wave shape between the successive samples. 7. To maintain pulse-top shape, _______ sampling is required. (2 Words) 8. In PPM, the ______ of the pulses of the carrier pulse train is varied in accordance with the modulating signal. 9. To avoid aliasing, an _____filter is used before the signal is sampled (2 Words) 10. main advantage of TDM over FDM is, it needs ____ circuitry 12. The spectral range occupied by the basic signal is called the ______ 13. In FDM, the ______ scale is shared by different signals. 15. In a PPM system, the transmitted pulses have Constant ____ and constant width 16. The PWM needs _____ power than PPM