Answer Happy

12:26 Done Assignment_1 - S 22... Circleor mark using different colors the most correct answer of the following usin Assignment I 1. A 4.7 mH inductor has a Q of 3500 at a frequency of 88 MHz. Its internal resistance is approximately a. 422 ohms b. 560 ohms. c. 742 ohms. d. 856 ohms. e. None of the above 2. The resonant frequency of a series resonant circuit of K-500 L-12 pH, and C-5 F a. 649,75 KH b. 346.92 KHz. € 129 kHz. d. 41.14 kHz € 20,6kHz. 3. The bandwidth of a series resonant circuit of R-5000, L-12 µl, and C-5 a. 1.592 kHz. b. 2.468 kHz c. 4.633 KHz. d. 6.631 KHz € 6.631 MHz 4. The parallel resonant circuit of R-52. L-45 mH, and C-3.3 nF, han Q and BW equal 100 a 171.2 and 241 Hz, respectively b. 233 and 241 Hz, respectively c. 1111 and 37.2 Hz, respectively d. 233 and 176. Hz, respectively e. None of the above 5. A measured value of 1 pW will result in what dBm power level? a. -90 dBm b-60 dBm c. -30 dBm d. 0 dBm e +10 dBm 6. Determine the voltage level required to produce a -10dBm level. Assume a 6000 system
12:26 Done Assignment_1 - S 22... 6. Determine the voltage level required to produce a +10dBm level. Assume a 6002 system a 0.775 V 1.05 V b. € 1947 V 245 V d. e None of the above. 7. The device which superimposes information onto a high-frequency signal for trammission is called modulato transducer. demodulator. d. amplifier e detector 8. A device that converts energy from one form to electrical signal is called a a modulator b transmitter. c. traducer d. detector e. Oscillator 9. The device which extracts the information signal from the high frequency carrier in a receiver is called: a traducer. transmitter. e demodulator 4 modulator e. Oscillator ((. 10. A 2 kHz sine wave is mixed with a 1.5 MHz carrier sine wave through a nonlinear device. Which frequency is not present in the output signal of the mixer? 43 MHz €. 1.502 MHz 1.5 MHz 1.497 Miz e. None of the above. 11. An AM transmitter has unmodulated antenna current of 10 A, what modulation indes the transmitter must have to produce modulated current of 12A7 0.52 0.67 €0.78 0.83
12:26 Done Assignment_1 - S 22... 12. If the percentage modulation of an AM transmitter is 93.81% and the unmodulated an current is 10 A, what is the modulated current? a. 10.5 A b. IIA €115A 12 A 12.5 A 13. If the carrier power is 12 KW, what is the modulated power if modulation index is (1/2) 12 kW b. 13 kW € 14 kW 15 kW € 16 kW d. ((. 14. A 2.5 MHz carrier is modulated by a music signal that has frequency components ranging from 500 Hz to 3 kHz. What is the range of frequencies generated for the upper sideband a 2.5500 MHz to 2.800 MHz b 25 MHz to 2.500 Mil c. 2.5001 MHz to 2.505 MHz d. 2.5005 MHz to 2.503 MHz e 2.5005 MHz to 2.5300 MHz 15. Overmodulation a results when the modulation index exceeds unity. bis undesirable because it produces sidebandsplaner e causes the AM signal to become distorted so that the receiver cannot produce a clean replica of the original intelligence signal d. causes loss of some intelligence signal from the output of the detector at the receiver side e. All the above. 16. A receiver's sensitivity is a. its ability to drive the output speaker to an acceptable level b. the extent to which a receiver can differentiate between the desired signal and other signals. e the ability of the receiver to demodulate a modulated signal d the ability of a receiver to attenuate noise signal e. All the above, 17. A receiver's selectivity is a. its ability to drive the output speaker to an acceptable level. b. the extent to which a receiver can differentiate between the desired signal and other signals c. the ability of the receiver to demodulate a modulated signal d the ability of a receiver to attenuate noise signals e. All the above.
12:27 Done Assignment_1-S 22... Q 18. In Figure 1. A is 220 mVp-p and B is 350 mVp-p. The percent modulation of the AM signalis a. 22.81% b. 43.12% c. $9.36% d. 62.92% € 72.81% 19. Use the answer of the above question to determine E. (carrier magnitude) if E. (intelligent magnitude) is 350 mV peak: a 1,005 v b. 1.286 v €1.534 v 1.826 v None of the above. Figur 20. In Figure 1. A is 1.5Vp-p and B is 3.3Vp-p. If the carrier signal is set at 1.2V peak, the intelligence signal is: a 3.2V peak. b. 0.55V peak. c. 0.93V peak d. 0.45V peak. e. 0.68V peak 21. The total output power of an AM transmitter that is being operated at 50% modulation is measured to be 1800 watts. What is the carrier power? a 1480 watts b. 1510 watts c. 1540 watts d. 1570 watts e. None of the above. 22. A 250W carrier is to be modulated at an 85% modulation level. What is the total d power? a 340.3 W 25.32 dB b. € 0.340 kW d. 55.32 dBm e. All the above. 23. An AM broadcast station operates at its maximum allowed output power of 180Wata
d. 55.32 dBm e. All the above. 23. An AM broadcast station operates at its maximum allowed output power of 180Wat percent modulation of 95% What is the upper sideband power? a. 6.1 watts &1847 wat €27.95 wat 42.2 was €55.96 was 24. The astea corrent of an AM manier is 5A when it is not modulated. It in is modulated. Its modulation index a. 93.23% 31.46% €75.14% 6481% 25. An intelligence signal is amplified by a 60% efficien amplifier before being combined with a 250W carrier to generate an AM signal. If it is desired to operate at 80% modulation, what must be the de input power to the final intelligence s signal? 384.6W b. 192.3W €162.5W d. 123,1W e. k3,3W 26. The equation defining the AM envelope is: e-E+Esin e int be-Esin and -Esii 4. c E sinte-Ein (E+Esin ) 27. Determine the frequency of the AM carrier shown in Figure 3 30 kr b100 kHz IMHz 410 M none of the above It increases to 5.5A when it b 385 kHz sinewave. 385 kHz AM signal d. 650 kHz AM signal. e the original intelligence signal Figure 2 Figure 3 --08 f 250W 28. An AM signal having a carrier frequency of 650 kHz is to be mixed with a local escillator signal at a frequency of 1035 kr. What does the output of the IF amplifier consist of a 385 x camer
28. An AM signal having a carrier frequency of 650 kHz is to be mixed with a local oscillator signal at a frequency of 1035 kitz. What does the output of the IF amplifier consist of 385 kHz camer 385 ke sine wave. kfz AM signal a b 4. 385 650 kHz AM signal the original inteligence sigral. 29. An AM signal with a d r frequency of 1360 kHz and intelligence of 1 kr, if the m output (IF) is of 490 kHz then the local oscillator output signal should be aan AM signal with a carrier frequency of 490 kr. b. an AM signal with a carrier frequency of 1850 kHz c. an 1850 kHz sine wave. da 490 kHz sine wave. e. None of the above. 30. An AM signal with a carrier frequency of 1360 kHz and intelligence of 1 kHz, if the mixer output (IF) is of 490 kHz then the input signal to the audio amplifier should be a a1 kliz sinewave. Figure 3 b. an AM signal with a carrier frequency of 490 kHz. can AM signal with a carrier frequency of 1360 kHz. d. a 490 kHz sinewave. e. None of the above. 31. An AM signal with a carrier frequency of 1360 kHz and intelligence of 1 ks, if the minu output (IF) is of 490 kHz, then the image frequency is a 980 kHz. b. 1360 kHz c. 1850 kr. d. 870 kHz. e. 2340 kz M 18e Figure 4 32. In figure 4, the power driven into the IF1 stage is: a 1.584 pW. b. 1.584 W
MOLDUR 32. In figure 4, the power driven into the IF2 stage is: a. 1.584 pW.. b. 1584 W. c. 1584 W. d. 1584 mW. € 1.584 W c. 109 dBm d. 89 dim. e 30 dBm -31 de 33. In figure 4, the conversion gain of the IF is 129 dBm b. 119 dBm Figure 4 a. 129 d b. 119 34. In figure 4, the total gain of the entire receiver from the antenna input to the audio amplifier output is c. 109 dB d. 89 dBm e. 30 dim. 35. Which of the following is required for SSB transmission? a carrier elimination. b. elimination of one sideband. ca orb da and b e none of the above 36. Voice transmission requires an audio frequency range of 20 Hz to 20kHz b 30 Hz to 10 kHz. 100 Hz to 3 kHz. b. 500 Hz to 1 kH e none of the above 37. Which is not an advantage of ceramic filters over crystal fillers? a more rugged in construction b. smaller in size higher Q valors d. less expensive. e. All the above.