A modulating signal f(t) is bandlimited to 5 kHz is sampled at a rate of 15000 samples/sec. The samples are quantized into 128 levels. Calculate the transmission bandwidth if the following modulation types are used for signal transmission: 4- ASK 5- 8-PSK 6- FSK with Af = 25 kHz

3-16 An audio oscillator operating at 1 kHz is gated on for an interval of 5 ms by a single baseband pulse. Sketch the form of the amplitude spectrum in the vicinity of the major positive frequency lobe, and label significant frequencies.

The maximum peak-to-peak value of an AM wave is 45 V. The peak-to-peak value of the modulating signal is 20 V. What is the percentage of modulation?

Draw the Q output on the waveform

A carrier wave of frequency 10 MHz and peak value 10 V is amplitude modulated by a 5-kHz sine wave of amplitude 6 V. Determine the modulation index.

Determine modulation index for a frequency modulator with a deviation sensitivity of 20 kHz/V and a modulating signal of 5cos 2π(2500)t

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3. Draw the DC load line for the circuit diagram sown in Figure. What will be the Q point if the zero signal base current is 25µA and β = 50.

Q5/ Suppose that on an AM signal, the Vmax Value read from the graticule on the oscilloscope screen is 5.9 divisions and Vmin is 1.2 divisions. What is the modulation index?

Clock Phase Clock Polarity Used to SPI Mode CPOL СРНА in Idle State Sample and/or Shift the Data Data sampled on rising edge Logic low and shifted out on the falling edge Data sampled on the falling edge and 1 1 Logic low shifted out on the rising edge Data sampled on the falling edge and 1 Logic high shifted out on the rising edge Data sampled on the rising edge and 3 1 Logic high shifted out on the falling edge