Homework Answers
Add Answer to:
Question 5 superheterodyne receiver that The commercial FM broadcasting radio uses a has the following specifications:...
3. In a shortwave AM superheterodyne radio, the IF amplifier is centered at 455 kHz. The...
3. In a shortwave AM superheterodyne radio, the IF amplifier is centered at 455 kHz. The receiver is designed to receive shortwave transmissions with carrier frequencies between 9.4 and 9.9 MHz. Determine the frequency range of the local oscillator for this receiver. Assume the local oscillator frequency is higher than the carrier frequency.
A communication system uses a superheterodyne receiver containing two mixers. The intermediate frequencies are 10.7 MHz...
A communication system uses a superheterodyne receiver containing two mixers. The intermediate frequencies are 10.7 MHz and 470 kHz. The desired signal has a carrier frequency of 102.3 MHz. (a) What are the two local oscillator frequencies in the receiver (both mixers are superheterodyne)? (3 marks) (b) Explain what an image frequency is. (2 marks) (c) How many image frequencies are there in this communication system? Calculate their frequencies. (5 marks) (d) Explain how this receiver removes each of the...
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...
4. A superheterodyne radio receiv er is required to cover the VHF frequency band from 70-85...
4. A superheterodyne radio receiv er is required to cover the VHF frequency band from 70-85 MHz, using an intermediate frequency (IF) of 10.7 MHz. a) Find the frequny range needed fromthe local oscillator. b) Determine whether all image frequencies will be outside the operating frequency band.
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...
The shortwave AM radio bands are above the normal AM commercial station frequencies and are separated...
The shortwave AM radio bands are above the normal AM commercial station frequencies and are separated into bands associated with the approximate wavelength of that band. The radio receiver designs are similar to commercial AM radio in that they use an IF of 455 kHz in a Superheterodyne receiver. For a station broadcasting in the 49 m band (5.8 to 6.2 MHz), select the required minimum to maximum LO frequency range. Question 4 options: A) 5.745 to 6.255 MHz B)...
3. A satellite communication receiver is designed to receive a transmission at 136.5 MHz. The receiver...
3. A satellite communication receiver is designed to receive a transmission at 136.5 MHz. The receiver uses two heterodyne operations (dual-conversion receiver) with intermediate frequencies of 25 MHz Texas A&M University-Kingsville, Electrical Engineering and Computer Science Department & 12 MHz, as shown below. The first local oscillator is designed to operate above the incoming carrier frequency, and the second local oscillator is to operate below the first intermediate frequency Mixer # 1 Mixer #2 Output RF X Filter & IF,...
You are designing an Armstrong FM radio with a carrier frequency of 91.2MHz and frequency deviati...
You are designing an Armstrong FM radio with a carrier frequency of 91.2MHz and frequency deviation between 40kHz and 45kHz. Your NBFM generates a FM signal with a carrier of 200kHz and the generated frequency deviation is 10Hz. The local oscillator can generate sinusoids with any frequency in the range of 10-12 MHz. Note that you can only use frequency doublers, and you have as many doublers as you need. Draw the block diagram of the FM transmitter. Give details...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA FM radio broadcasting utilizes the frequency band A. 0.665 MHz-1.6 MHz B. 80 MHz - 100 MHz C. 88 MHz 108 MHz 2. The pre-emphasis is generally used A. to improve the demodulator performance in the presence of noise in the received signal B. to improve the modulator performance C. to improve the stereophonic effect 3. The intermediate frequency of FM superheterodyne receiver is...
Q2. (a) Determine the Fourier transform of a Hann (sometimes called a raised cosine) window function...
Q2. (a) Determine the Fourier transform of a Hann (sometimes called a raised cosine) window function h(t) of width T, defined + cos 2 0 (b) Sketch the form of a sinusoidal waveform of frequency vo as observed on a spectrum 4] analyser with the Hann window function enabled. Assume voT> 1. Q3. A television receiver uses the superheterodyne detection system to translate signals to an intermediate frequency of 44 MHz. Terrestial digital television broadcasts in the U.K. since 2012...
3. In a shortwave AM superheterodyne radio, the IF amplifier is centered at 455 kHz. The receiver is designed to receive shortwave transmissions with carrier frequencies between 9.4 and 9.9 MHz. Determine the frequency range of the local oscillator for this receiver. Assume the local oscillator frequency is higher than the carrier frequency.
A communication system uses a superheterodyne receiver containing two mixers. The intermediate frequencies are 10.7 MHz and 470 kHz. The desired signal has a carrier frequency of 102.3 MHz. (a) What are the two local oscillator frequencies in the receiver (both mixers are superheterodyne)? (3 marks) (b) Explain what an image frequency is. (2 marks) (c) How many image frequencies are there in this communication system? Calculate their frequencies. (5 marks) (d) Explain how this receiver removes each of the...
4. A superheterodyne radio receiv er is required to cover the VHF frequency band from 70-85 MHz, using an intermediate frequency (IF) of 10.7 MHz. a) Find the frequny range needed fromthe local oscillator. b) Determine whether all image frequencies will be outside the operating frequency band.
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...
3. A satellite communication receiver is designed to receive a transmission at 136.5 MHz. The receiver uses two heterodyne operations (dual-conversion receiver) with intermediate frequencies of 25 MHz Texas A&M University-Kingsville, Electrical Engineering and Computer Science Department & 12 MHz, as shown below. The first local oscillator is designed to operate above the incoming carrier frequency, and the second local oscillator is to operate below the first intermediate frequency Mixer # 1 Mixer #2 Output RF X Filter & IF,...
Assignment 2. Multiple choice assignment. Check the right answer. 5 points each answer 1. The USA FM radio broadcasting utilizes the frequency band A. 0.665 MHz-1.6 MHz B. 80 MHz - 100 MHz C. 88 MHz 108 MHz 2. The pre-emphasis is generally used A. to improve the demodulator performance in the presence of noise in the received signal B. to improve the modulator performance C. to improve the stereophonic effect 3. The intermediate frequency of FM superheterodyne receiver is...
Q2. (a) Determine the Fourier transform of a Hann (sometimes called a raised cosine) window function h(t) of width T, defined + cos 2 0 (b) Sketch the form of a sinusoidal waveform of frequency vo as observed on a spectrum 4] analyser with the Hann window function enabled. Assume voT> 1. Q3. A television receiver uses the superheterodyne detection system to translate signals to an intermediate frequency of 44 MHz. Terrestial digital television broadcasts in the U.K. since 2012...
Most questions answered within 3 hours.
-
Here is a pair of aromatic compounds that each have a complicated
set of aromatic peaks....
asked 10 minutes ago -
As with many public goods, determining the appropriate level of
government support for the production of...
asked 13 minutes ago -
Write a balanced chemical equation for the oxidation reaction
between Caro’s acid (H2SO5) and CN– ion...
asked 16 minutes ago -
Calculate the number of valence electrons for
[Mo(C6H6)(CO)3]
asked 27 minutes ago -
Which of the following are true about the strength of the
association between two variables?
1-...
asked 23 minutes ago -
You are a monopolist and know that your consumers have a linear
demand curve. At what...
asked 22 minutes ago -
Raising a heavy load requires work. Raising it in half the time
requires:
asked 29 minutes ago -
MGT-201: Marketing Management
Before deciding on the structure of the channel marketers must
take several factors...
asked 28 minutes ago -
1. ACLs allow a router to control traffic within a network. The
concept is very similar...
asked 30 minutes ago -
35. When the electron in a hydrogen atom falls from its first
excited energy level to...
asked 31 minutes ago -
A man is dragging a box of mass "m" by using a rope which rests
on...
asked 48 minutes ago -
Liquid octane
(CH3(CH2)6CH3) will
react with gaseous oxygen (O2) to produce gaseous carbon
dioxide (CO2) and...
asked 49 minutes ago