Cont (InPhase) Cont (Quadrature) UpConverter Cont $\sim$ Cont $\sim$ Cont Cont Cont Cont TxAmp [TxSignal] [TxSignalbAmp]
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The input signals are InPhase and Quadrature. These signals are multiplied by carrier signals (represented by the $\sim$ symbols). Show more…
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Which of the following is considered a nonlinear device? a. Resistor b. Capacitor c. Potentiometer d. Transistor 2. High-level modulation is used: a. when the intelligence signal is added to the carrier at the last possible point before the transmitting antenna. b. in high-power applications such as standard radio broadcasting. c. when the transmitter must be made as power efficient as possible. d. all of the above. 3. The process of neutralization is: a. placing a negative feedback capacitor in an RF amplifier to reduce the tendency for self-oscillation. b. a technique for filtering out all of the undesired frequencies produced by mixing action in a nonlinear amplifier except for the carrier, sum, and difference frequencies. c. the process of adjusting the tank circuit so that the transmitter produces the proper output frequency. d. the process of adjusting the percent modulation to its desired level in a modulator stage. 4. The O.T.A. is: a. a special type of op amp used to create an AM signal. b. an operational transconductance amplifier. c. a linear integrated circuit that creates AM with an absolute minimum of design considerations. d. all of the above 5. The typical output impedance for an RF transmitter is: 75 Ω 50 Ω 8 Ω 16 Ω e. none of the above 6. Which of the following is not an advantage of synchronous detection? a. Low distortion b. Eliminate diagonal clipping c. Greater ability to follow fast-modulated signals d. Ability to produce gain
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