A transmitter transmits an AM signal with a carrier frequency of 1305 kHz. When an inexpensive...
A transmitter transmits an AM signal with a carrier frequency of
1305 kHz. When an inexpensive radio receiver (which has poor
selectivity in the RF-stage bandpass filter) is tuned to 1305 kHz
the signal is heard loud and clear. The same signal is also heard
(not so loud) at another setting. At what frequencies
except 1305 KHz you will hear this station. The IF frequency is 455
kHz.
Homework Answers
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A transmitter transmits an AM signal with a carrier frequency of
1305 kHz. When an inexpensive...
Consider a superheterodyne receiver designed to receive the frequency band 1 to 30 MHz with IF...
Consider a superheterodyne receiver designed to receive the frequency band 1 to 30 MHz with IF frequency 10 MHz. The local oscillator generates frequencies such that the ratio between the maximum and the minimum generated frequency is the smallest. a) What is the range of frequencies generated by local oscillator for this receiver? b) An incoming signal with carrier frequency 6 MHz is received at 6 MHz setting. At this setting we also get interference from a signal with some...
71. A superheterodyne receiver tunes at the frequency range from 25 to 50 MHz. What is the IF frequency of the rece...
71. A superheterodyne receiver tunes at the frequency range from 25 to 50 MHz. What is the IF frequency of the receiver if the range of the local oscillator is 10 MHz to 35MHz 75. An AM transmitter uses high-level modulation. The RF power amplifier draws 12 A from 22 V supply putting out a carrier power of 140 Watts. What impedance would be seen at the modulation transformer secondary? 72. A receiver has a sensitivity of 0Suv and blocking...
A stationary wireless transmitter transmits data at 256 kbps at a carrier frequency of 900 MHz. i...
A stationary wireless transmitter transmits data at 256 kbps at a carrier frequency of 900 MHz. i) Determine the maximum and minimum spectral frequencies of the received data if the receiver is travelling at a speed of 100 km per hour. ii) Characterize the channel fading as slow or fast with valid reason.
A stationary wireless transmitter transmits data at 256 kbps at a carrier frequency of 900 MHz. i) Determine the maximum and minimum spectral frequencies of the received...
8.4 Mixers 8.21* An AM signal is transmitted on an 800-kHz carrier. The baseband frequency range...
8.4 Mixers 8.21* An AM signal is transmitted on an 800-kHz carrier. The baseband frequency range extends from 100 Hz to 5 kHz. This signal is to be detected by a superheterodyne receiver with a 55-kHz intermediate frequency. (a) What is the frequency of the local oscillator? (b) What must be the Q of the IF stages if the 1-dB points are to correspond to the maximum and minimum frequencies of the IF signal?
The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Chan...
The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Channel No. Freqency 1760 kHz 1890 kHz 2020 kHz 2150 kHz 10 2 12 When the AM superheterodyne radio receiver is tuned to Channel 10, in addition to the signal carried on Channel 10, you can also hear a weak signal carried on Channel3 (i)...
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in...
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input filter consist of one tuned circuit with a Q of 40? An SSB system transmit a peak envelope power of 100 W into a 75 ohms load. The carrier signal is modulated by two tones, with frequencies 2 kHz and 3 kHz with equal magnitude and only the lower sideband is transmitted with a suppressed carrier. Determine the average...
)(This question is not related to Q1 Part a) For the VSB transmitter block diagram in the figure,- (t)-2000 sine (4000m) andthe carrier frequency f-10 kHz. )Sketch the receiven block diagram...
)(This question is not related to Q1 Part a) For the VSB transmitter block diagram in the figure,- (t)-2000 sine (4000m) andthe carrier frequency f-10 kHz. )Sketch the receiven block diagram 8K 乙 Sketch the transfer function of the receiver filter Ho(o) showing clearly all frequencies and 20 itudes Show how the block diagram shown can be modified to generate VSB-TC We were unable to transcribe this image
)(This question is not related to Q1 Part a) For the VSB...
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input f...
An AM receiver is tuned to broadcast station at 600 kHz. Calculate the image rejection in dB, assuming that the input filter consist of one tuned circuit with a Q of 40? An SSB system transmit a peak envelope power of 100 W into a 75 ohms load. The carrier signal is modulated by two tones, with frequencies 2 kHz and 3 kHz with equal magnitude and only the lower sideband is transmitted with a suppressed carrier. Determine the average...
We would like to build an AM radio receiver using a series RLC circuit working as a bandpass filter. We have decided to...
We would like to build an AM radio receiver using a series RLC
circuit working as a bandpass filter. We have decided to use a 240
μH inductor with an internal resistance of 12Ω, and a variable
capacitor whose capacitance varies between 40 to 360 pF. A radio
“tunes” into a certain frequency by adjusting its receiver circuit
so that it resonates at that frequency, and it only catches that
specific frequency.
1. Determine the range of channel frequencies that...
a) An AM radio station is transmitting a message signal, x(thwhose frequency spectrum shown in Fig....
a) An AM radio station is transmitting a message signal, x(thwhose frequency spectrum shown in Fig. 1(a) using a carrier radian frequency of Qe=1000 rad/sec as shown in Fig 1(b). i) Sketch the spectra of the message at the output of the transmitter. X(w) 10 -2007 2007 W rad sec Fig. 1(a) xt) х m COS Transmitter Fig. 1(b) b) If two neighboring AM stations also transmit signals of the same bandwidth, what must be their carrier frequencies to avoid...
71. A superheterodyne receiver tunes at the frequency range from 25 to 50 MHz. What is the IF frequency of the receiver if the range of the local oscillator is 10 MHz to 35MHz 75. An AM transmitter uses high-level modulation. The RF power amplifier draws 12 A from 22 V supply putting out a carrier power of 140 Watts. What impedance would be seen at the modulation transformer secondary? 72. A receiver has a sensitivity of 0Suv and blocking...
A stationary wireless transmitter transmits data at 256 kbps at a carrier frequency of 900 MHz. i) Determine the maximum and minimum spectral frequencies of the received data if the receiver is travelling at a speed of 100 km per hour. ii) Characterize the channel fading as slow or fast with valid reason.
A stationary wireless transmitter transmits data at 256 kbps at a carrier frequency of 900 MHz. i) Determine the maximum and minimum spectral frequencies of the received...
The following is the channel frequency assignment for a 12-channel AM radio system: (c) Channel No Fcy 1240 kHz 1370 kHz 500 kHz 1630 kHz Channel No.Frequency 2280 kHz 2410 kHz 2540 kHz 2670 kHz Channel No. Freqency 1760 kHz 1890 kHz 2020 kHz 2150 kHz 10 2 12 When the AM superheterodyne radio receiver is tuned to Channel 10, in addition to the signal carried on Channel 10, you can also hear a weak signal carried on Channel3 (i)...
)(This question is not related to Q1 Part a) For the VSB transmitter block diagram in the figure,- (t)-2000 sine (4000m) andthe carrier frequency f-10 kHz. )Sketch the receiven block diagram 8K 乙 Sketch the transfer function of the receiver filter Ho(o) showing clearly all frequencies and 20 itudes Show how the block diagram shown can be modified to generate VSB-TC We were unable to transcribe this image
)(This question is not related to Q1 Part a) For the VSB...
We would like to build an AM radio receiver using a series RLC
circuit working as a bandpass filter. We have decided to use a 240
μH inductor with an internal resistance of 12Ω, and a variable
capacitor whose capacitance varies between 40 to 360 pF. A radio
“tunes” into a certain frequency by adjusting its receiver circuit
so that it resonates at that frequency, and it only catches that
specific frequency.
1. Determine the range of channel frequencies that...
a) An AM radio station is transmitting a message signal, x(thwhose frequency spectrum shown in Fig. 1(a) using a carrier radian frequency of Qe=1000 rad/sec as shown in Fig 1(b). i) Sketch the spectra of the message at the output of the transmitter. X(w) 10 -2007 2007 W rad sec Fig. 1(a) xt) х m COS Transmitter Fig. 1(b) b) If two neighboring AM stations also transmit signals of the same bandwidth, what must be their carrier frequencies to avoid...
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