Description : A dipole antenna requires to be fed with 20 kW of power to produce a given signal strength to a particular distant point. If the addition of a reflector makes the same field strength available with an input power of 11kW ... Gain referred to this particular dipole). A. 4.75 B. 2.6 C. 1.81 D. 4.24
Last Answer : B. 2.6
Description : A dipole antenna requires to be feed with 20 kW of power to produce a given signal strength to a particular distant point. If the addition of a reflector makes the same field strength available with an input power of 11 ... ( Gain referred to this particular dipole) A. 4.24 B. 1.81 C. 4.75 D. 2.6
Last Answer : D. 2.6
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
Description : What is meant by antenna gain? A. The final amplifier gain minus the transmission line losses (including any phasing lines present) B. The ratio of the amount of power produced by the antenna ... D. The numeric ratio relating the radiated signal strength of an antenna to that of another antenna
Last Answer : D. The numeric ratio relating the radiated signal strength of an antenna to that of another antenna
Description : The frequency-response specification of your tape recorder reads within +/ - 3 dB from 150 Hz to 150 kHz at 60 ips. What does this mean?
Last Answer : The recorder can record all frequencies between 150 Hz and 150 kHz at 60 ips without varying the output amplitude more than 3 dB.
Description : The effect of adding parasitic elements of a Hertz dipole is to A. make the antenna more omnidirectional B. reduce its resonant frequency C. increase the antenna’s power gain D. All of these
Last Answer : C. increase the antenna’s power gain
Description : Part of a microwave link can be approximated by free space conditions. The antenna gain are each 40 dB, the frequency is 10 GHz, and the path length is 80 km. Calculate the receive power for a transmitted power of 10 W? A. 0.871 μW B. 871 μW C. 0.871 mW D. 871 nW
Last Answer : A. 0.871 μW
Description : Determine the effective radiated power of 20 kW TV broadcast transmitter whose antenna has a field gain of 2. A. 40 kW B. 80,000 watts C. 40,000 watts D. 8,000 watts
Last Answer : B. 80,000 watts
Description : And ITU-T specification code that deals with the telephone circuits. A. X series B. T series C. V series D. I series
Last Answer : C. V series
Description : What satellite system parameter represents the quality of a satellite or an earth station receiver? A. Gain-to-Equivalent Noise Temperature Ratio (G/Te) B. Energy of Bit-to-Noise Density Ratio (Eb/No) C. Carrier-to-Noise Density Ratio (C/No) D. Bit energy
Last Answer : A. Gain-to-Equivalent Noise Temperature Ratio (G/Te)
Description : The ratio of the level of the modulated output of a transmitter under conditions of standard test modulation to the level of the demodulated output with no modulation applied both measured with the ... . Reference audio output B. None of these C. Audio frequency response D. Residual noise level
Last Answer : D. Residual noise level
Description : What is the difference between phase and frequency modulation? A. Is purely theoretical because they are the same in practice B. Lies in poorer audio response of phase modulation C. Lies in the different definitions of the modulation index D. Is too great to make two systems compatible
Last Answer : C. Lies in the different definitions of the modulation index
Description : How does the gain of a parabolic dish type antenna change when the operating frequency is doubled? A. Gain does not change B. Gain is multiplied by 0.707 C. Gain increases 6 dB D. Gain increases 3 dB
Last Answer : C. Gain increases 6 dB
Description : If the antenna current is doubled, the field strength at a particular position is A. doubled B. halved C. multiplied by a factor of four D. divided by a factor of four
Last Answer : A. doubled
Description : Stacking elements in a transmitting antenna system A. increases the field strength at the receiving antenna B. increases the directivity of the transmitter antenna C. decrease the size of the lobe in the radiation pattern D. both A and B
Last Answer : D. both A and B
Description : How does the electric field strength of a standard broadcast station vary with the distance from the antenna? A. The field strength of a standard broadcast station vary with the distance from ... the distance from the antenna D. The field strength varies inversely as the distance from the antenna
Last Answer : D. The field strength varies inversely as the distance from the antenna
Description : Which of the following best describes a dip-meter? A. An SWR meter B. A counter C. A variable LC oscillator with metered feedback current D. A field strength meter
Last Answer : C. A variable LC oscillator with metered feedback current
Description : What is the resultant field strength at the receiving antenna in space wave propagation under case 2? A. 0 B. ξd C. 2ξd D. 3ξd
Last Answer : C. 2ξd
Description : Best described a dip-meter. A. A variable LC oscillator with metered feedback current B. An SWR meter C. A counter D. A field strength meter
Last Answer : A. A variable LC oscillator with metered feedback current
Description : What is the unit of electric field strength? A. Watt/meter B. Ohms/meter C. Ampere/meter D. Watt/meter2 E. No answer
Last Answer : E. No answer
Description : ____________ is measuring the propagated field strength over the projected service area A. Radio sounding B. None of these C. Radio monitoring D. Radio survey
Last Answer : D. Radio survey
Description : What determines antenna polarization? A. The frequency of the radiated wave B. The direction of the radiated wave C. The direction of the magnetic field vector D. The direction of the electric field vector
Last Answer : D. The direction of the electric field vector
Description : What is the ratio of the maximum radiation intensity to the average radiation intensity? A. Aperture gain B. Directivity gain C. Transmission gain D. Power gain
Last Answer : B. Directivity gain
Description : The power fed to a two-bay turnstile antenna is 100 watts. If the antenna has a 2 dB power gain, what is the effective radiated power? A. 317 watts B. 158 watts C. 200 watts D. 400 watts
Last Answer : B. 158 watts
Description : _____ of an antenna is a measure of how the antenna concentrates its radiated power in a given direction. A. Efficiency B. Power C. Gain D. Polarization
Last Answer : C. Gain
Description : The noise figure of the first circuit in tandem connection is 10.5 dB while its power gain is 15, what is the over all noise figure if the second circuit has a noise figure of 11 dB? A. 11.59 dB B. 11.23 dB C. 10.79 dB D. 10.5 dB
Last Answer : C. 10.79 dB
Description : What is the difference between available power and power budget? A. Power margin B. Extra power C. Fade margin D. System gain
Last Answer : A. Power margin
Description : What is the effective radiated power of a repeater with 200 watts transmitter power output, 4 dB feline loss, 4 dB duplexer and circulator loss, and 10 dB antenna gain? A. 317 W B. 2000 W C. 126 W D. 260 W
Last Answer : A. 317 W
Description : What is the effective radiated power of a repeater with 120 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 6 dB antenna gain? A. 601 W B. 240 W C. 60 W D. 379 W
Last Answer : C. 60 W
Description : What is the effective radiated power of a repeater with 100 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 10 dB antenna gain? A. 800 W B. 126 W C. 12.5 W D. 1260 W
Last Answer : B. 126 W
Description : What is the effective radiated power of a repeater with 75 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 6 dB antenna gain? A. 37.6 W B. 237 W C. 150 W D. 23.7 W
Last Answer : A. 37.6 W
Description : What is the effective radiated power of a repeater with 75 watts transmitter power output, 4 dB feedline loss, 3 dB duplexer and circulator loss, and 10 dB antenna gain? A. 600 W B. 75 W C. 18.75 W D. 150 W
Last Answer : D. 150 W
Description : What is the effective radiated power of a repeater with 50 watts transmitter power output, 5 dB feedline loss, 4 dB duplexer and circulator loss, and 7 dB antenna gain? A. 300 W B. 315 W C. 31.5 W D. 69.9 W
Last Answer : C. 31.5 W
Description : What is the effective radiated power of a repeater with 50 watts transmitter power output \, 4 dB feedline loss, 3 dB duplexer and circulator loss, and 6 dB antenna gain? A. 158 W B. 39.7 W C. 251 W D. 69.9 W
Last Answer : B. 39.7 W
Description : The product of antenna input power and the antenna power gain expressed in kW is called __. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power
Last Answer : A. Effective Radiated Power (ERP)
Description : The product of the radiated RF power of a transmitter and the gain of the antenna system in a given direction relative to an isotropic radiator is called ____. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power
Last Answer : B. Effective Isotropic Radiated Power (EIRP)
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
Last Answer : C. 49
Description : _______ is referred as the difference between available power and power budget? A. Fade margin B. Power margin C. Nominal gain D. Power dissipation
Last Answer : B. Power margin
Description : An increase in the effective power radiated by an antenna in a certain desired direction at the expense of power radiated in other directions. A. Antenna gain B. Antenna back lobe ration C. Antenna total ration D. Antenna efficiency
Last Answer : A. Antenna gain
Description : The product of the power supplied to the antenna and its gain relative to a half-wave dipole in a given direction. A. Peak envelope power B. ERP C. Rated power D. Carrier power’
Last Answer : B. ERP
Description : If you have available number of power amplifiers with a gain of 100 each, how many such amplifiers do you need to cascade to give an overall gain of 60 dB? A. 3 B. 4 C. 5 D. 2
Last Answer : A. 3
Description : What are the differences between the microphones used from the 1940-1950’s eras to today’s current stage-type microphones?
Last Answer : answer:I’m not referring to wireless mics either. Stage mics that are still on a black stand and hard wired. these mics
Last Answer : Against melusine. To prevent hissing and howling in gusts of wind when shooting outdoors. As the air flows around the smooth obstacle, the air velocity increases, the pressure decreases, and small ... strokes when pronouncing lip consonants), at least where they can be installed (in the studio).
Description : Are the microphones in nfl quarterbacks live all the time If so why couldn't the sideline coaches warn the quarterback of an impending sack?
Last Answer : The in game communications between coaches and players is shutoff when the 40-second play clock hits 15 seconds. After that, thecoaches cannot communicate with the players on the field until thecurrent scrimmage down ends.
Description : How to Find Affordable Vocal Microphones for Recording Studios?
Last Answer : Affordable vocal microphones for recording studios may be easy to come by, but only a few are worth purchasing. When recording, quality sound replication is essential, and most cheap mics fail to achieve this. Microphones ... for rock, soul or R & B.Nady RSM-4The Nady RSM-4 is a classic, vocal
Description : How To Find Cheap Microphones?
Last Answer : Microphones are a great resource for people who use VoIP or recording for their computers. Microphones can cost anywhere from ten dollars to five hundred dollars. Many consumers don’t want to spend a whole ... you buy it.2.&nbps;&nbps;&nbps;Amazon.com. Amazon is another online website that will a
Description : What online retailer sells musical instrument microphones?
Last Answer : Musician's Friend has the largest selection of instrument microphones on the internet. They also have a mail-order catalog that you can order from, but they sometimes offer certain perks for ordering online.
Description : How many built in microphones does Tascam DR-100 have?
Last Answer : The Tascam DR-100 has four built-in microphones.
Description : How far apart do you need to have your microphones so that you don't get interference?
Last Answer : They should be at least 2-3 feet apart to prevent any sort of static.
Description : Plots of field strength or power density with respect to the value at a reference point.
Last Answer : relative radiation pattern