Television receiver antenna is usually

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Television receiver antenna is usually Yagi antenna.

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A receiver connected to an antenna whose resistance is 50 Ω has an equivalent noise resistance of 30Ω. Calculate its equivalent noise temperature if the noise figure is equal to 1.6. A. 17.4 K B. 174K C. 1.74K D. 17K

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Description : Calculate the noise figure of the receiver whose RF amplifier has an input resistance of 1000Ω and an equivalent shot-noise resistance of 2000Ω, a gain of 25 and load resistance of 125 kΩ. Given that the bandwidth is 1. ... to an antenna with an impedance of 75Ω. A. 30.3 B. 3.03 C. 303 D. .303

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Description : A satellite transmitter operates at 4GHz with an antenna gain of 4dBi. The receiver 40000 km away has an antenna gain of 50 dBi. If the transmitter has a power of 8 W, find (ignoring feedline losses and mismatch) the EIRP in dBW. A. 50 B. 69 C. 49 D. 30

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Last Answer : A. Satellite dish

ECE Board Exam March 1996 What is the purpose of the receiver’s squelch circuit? A. To overcome fluctuations in the level the RF signal arriving at the receiver antenna B. To prevent fluctuations in the AGC bias level C. To reduce the receiver’s sensitivity to all incoming signals D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

Description : ECE Board Exam March 1996 What is the purpose of the receiver's squelch circuit? A. To overcome fluctuations in the level the RF signal arriving at the receiver antenna B. To prevent ... signals D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

Last Answer : D. To prevent amplified noise from reaching the loudspeaker during the absence of an incoming signal

ECE Board Exam March 1996 The capture area of an antenna is directly proportional to the A. frequency of the received signal B. distance between transmitter and receiver C. gain of the antenna D. power density of the signal

Description : ECE Board Exam March 1996 The capture area of an antenna is directly proportional to the A. frequency of the received signal B. distance between transmitter and receiver C. gain of the antenna D. power density of the signal

Last Answer : C. gain of the antenna

ECE Board Exam March 1996 A receiver connected to an antenna whose resistance is 50 ohms has an equivalent noise resistance of 30 ohms. What is the receiver’s noise temperature? A. 754 K B. 464 K C. 174 K D. 293 K

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Last Answer : C. 174 K

What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?

Description : What is the result of an impedance mismatch between a receiver or transmitter and its transmission line or antenna?

Last Answer : High vswr, which equates to poor reception or a loss of power output.

Is it necessary for the remote control to be pointing exactly toward the receiver to control the television?

Description : Is it necessary for the remote control to be pointing exactly toward the receiver to control the television?

Last Answer : No, pointing it in the general direction will usually work. Theonly problem might be if the InfraRed receiver on the TV is hiddenor obscured somehow, Check your TV's manual to find out where theIR Receiver is located.

Is it necessary for the remote control to be pointing exactly toward the receiver to control the television?

Description : Is it necessary for the remote control to be pointing exactly toward the receiver to control the television?

Last Answer : No, pointing it in the general direction will usually work. Theonly problem might be if the InfraRed receiver on the TV is hiddenor obscured somehow, Check your TV's manual to find out where theIR Receiver is located.

Communication management: 1. Is important only in projects involving telephone, television, radio, or newspaper production facilities and operations 2. Is not a big problem for people with normal speech, sight and hearing 3. Involves the originator, the message, the medium and the receiver 4. Preparing an agenda

Description : Communication management: 1. Is important only in projects involving telephone, television, radio, or newspaper production  facilities and operations  2. Is not a big problem for people with normal ... . Involves the originator, the message, the medium and the receiver  4. Preparing an agenda

Last Answer : 3. Involves the originator, the message, the medium and the receiver

What is the best television antenna?

Description : What is the best television antenna?

Last Answer : The best rated television antenna would depend on whether you want an indoor or outdoor antenna. I have found that Amazon is a great site for making comparisions on these as well as other ... can compare the different antennas as well as read reviews written by people who have purchased them.

Do I need a digital television antenna if I have a satellite such as DirectTV?

Description : Do I need a digital television antenna if I have a satellite such as DirectTV?

Last Answer : Broadcast TV stations in the U.S. have switched from analog to digital transmissions. This Fact Sheet provides information on TV antennas and tips for obtaining good quality reception of digital broadcasts.

An antenna that can only receive a television signal. A. Isotropic antenna B. TVRO C. Reference antenna D. Yagi antenna

Description : An antenna that can only receive a television signal. A. Isotropic antenna B. TVRO C. Reference antenna D. Yagi antenna

Last Answer : B. TVRO

What type of transmission line is often used to connect a television set to its antenna?

Description : What type of transmission line is often used to connect a television set to its antenna?

Last Answer : Twin lead.

In a broadcast communication receiver, most of the receiver selectivity is achieved in:

Description : In a broadcast communication receiver, most of the receiver selectivity is achieved in: (1) RF section (2) IF section (3) Mixer (4) Local oscillator 

Last Answer : In a broadcast communication receiver, most of the receiver selectivity is achieved in: RF section

An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak

Description : An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

Last Answer : An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

For an earth station transmitter, with an antenna output power of 40dBW 10,000W, a back-off loss of 3dB, a

Description : For an earth station transmitter, with an antenna output power of 40dBW 10,000W, a back-off loss of 3dB, a total branching and feeder loss of 3dB, a total branching and feeder loss of 3dB and transmit ... effective isotropic radiated power (EIRP will be  a) 38dBW b) 40 dBW c 36 dBW d) 47 dBW

Last Answer : For an earth station transmitter, with an antenna output power of 40dBW 10,000W, a back-off loss of 3dB, a total branching and feeder loss of 3dB, a total branching and feeder loss of 3dB and transmit antenna gain of 4dB, the effective isotropic radiated power (EIRP will be 38dBW

The directive gain of an antenna:

Description : The directive gain of an antenna: (1) is less than or equal to 1 (2) is greater than or equal to 1 (3) lies between 0 and directivity of antenna (4) is greater than directivity of antenna

Last Answer : The directive gain of an antenna: lies between 0 and directivity of antenna

Adaptive array antenna is superior to switched beam antenna because:

Description : Adaptive array antenna is superior to switched beam antenna because: (A) It optimizes the power radiated (B) It has simpler architecture (C) It has low bandwidth (D) It has low backlobe

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The line of sight communication requires transmit and receive antenna to face each other. If the transmit...

Description : The line of sight communication requires transmit and receive antenna to face each other. If the transmit antenna is vertically polarized, for the best reception the receive antenna should be:  ... 45° with respect to the horizontal polarization (4) At 45° with respect to the vertical polarization

Last Answer : The line of sight communication requires transmit and receive antenna to face each other. If the transmit antenna is vertically polarized, for the best reception the receive antenna should be:  Horizontally polarized.

In any transmitting antenna system, efficiency primarily depends upon

Last Answer : In any transmitting antenna system, efficiency primarily depends upon radiation resistance.

Ground plane antenna are used for

Last Answer :  Ground plane antenna are used for VHF

A helical antenna is used for satellite tracking because of its

Last Answer : A helical antenna is used for satellite tracking because of its Circular polarization

The number of parasitic elements in yagi antenna is

Last Answer : The number of parasitic elements in yagi antenna is 2.

Electrical length of an antenna is

Last Answer : Electrical length of an antenna is Greater than physical length.

Yagi antenna has

Last Answer : Yagi antenna has Driven antenna, reflector and directors.

Yagi antenna contains

Last Answer : Yagi antenna contains Dipole, one reflector and many directors.

Antenna commonly used for microwave links are

Last Answer : Antenna commonly used for microwave links are Paraboloidal dishes.

Snow is a television picture is a result of

Last Answer : Snow is a television picture is a result of Random noise in the signal.

A buffer amplifier is usually associated with

Description : A buffer amplifier is usually associated with (A) High input resistance (B) Low output resistance (C) Unity Voltage Gain (D) All Of the above

Last Answer : A buffer amplifier is usually associated with (A) High input resistance (B) Low output resistance (C) Unity Voltage Gain (D) All Of the above

A practical current source is usually represented by....

Description : A practical current source is usually represented by  a. A resistance in series with an ideal current source.  b. A resistance in parallel with an ideal current source.  c. A resistance in parallel with an ideal voltage source.  d. None of the above. 

Last Answer : A practical current source is usually represented by a resistance in parallel with an ideal current source.

The anode material is usually

Last Answer : The anode material is usually Nickel.

Rheostats are usually rated in

Last Answer : Rheostats are usually rated in Watts and Amperes.

Radar antennas are usually

Last Answer : Radar antennas are usually Parabolic dishes.