Description : The magic-T is composed of what two basic types of T junctions?
Last Answer : E-type and H-type.
Description : What are the two primary disadvantages of a two-wire open line?
Last Answer : High radiation losses and noise pickup.
Description : In a microwave magic-T, E plane and H plane are a) In phase b) Out of phase c) Isolated d) 90o out of phase
Last Answer : In a microwave magic-T, E plane and H plane are Isolated
Description : What are the two main disadvantages of an LC capacitor filter?
Last Answer : Cost and size of the inductor.
Description : What are two disadvantages of procedure oriented languages?
Last Answer : They require more space in memory and they process data at a slower rate than symbolic languages.
Description : What are some disadvantages of operating a transmitter at or near the muf?
Last Answer : Frequent signal fading and dropouts.
Description : What are some disadvantages of operating transmitters at or near the luf?
Last Answer : Signal-to-noise ratio is low and the probability of multipath propagation is greater.
Description : . What are the two main disadvantages of an LC capacitor filter?
Last Answer : Cost of the inductor and size of the inductor.
Description : List the three disadvantages of the air coaxial line
Last Answer : Expensive to construct, must be kept dry, and high frequency losses limit the practical length of the line.
Description : What is one of the major disadvantages of multilayer printed circuit boards?
Last Answer : Difficulty of repair of internal connections.
Description : What are the disadvantages of point-to-point wiring?
Last Answer : "Rat's nest" appearance and unwanted interaction, such as capacitive and inductive effects.
Description : What type resistor should be used to overcome the disadvantages of the carbon resistor?
Last Answer : The wirewound resistor.
Description : What are the two disadvantages of carbon-type resistors?
Last Answer : 1. Change value with age. 2. Limited power capacity.
Description : How do closed-loop capstan drive tape transports overcome the disadvantages of the open-loop drive design?
Last Answer : Closed loop capstan drive transports use more than one capstan to clamp the tape in the area around the magnetic head.
Description : There are two types of tape transport configurations, open loop capstan drive and closed-loop capstan drive. What are two major disadvantages of open-loop capstan drive tape transports?
Last Answer : a. Only operates in one direction. b. The tape tension and head-to-tape contact can vary.
Description : What are two disadvantages of the take-up control reeling system?
Last Answer : a. It only works in one direction. b. The tape tension varies as the supply reel unwinds, which can cause damage during starts and stops.
Description : What are two disadvantages of using a recorder’s erase head to erase data recorded on a magnetic tape?
Last Answer : Using an erase head is slow, and it may not completely erase the tape.
Description : What are the disadvantages of radiotelephone communications?
Last Answer : Static, enemy interference or a high local noise level.
Description : Name two major disadvantages of transistors.
Last Answer : Sensitive to heat and minor overloads.
Description : What are the disadvantages of the parasitic array?
Last Answer : Their adjustment is critical and they do not operate over a wide frequency range.
Description : What are some disadvantages of the end-fire array?
Last Answer : Extremely low radiation resistance, confined to one frequency, and affected by atmospheric conditions.
Description : What two variables determine the primary frequency of a resonant cavity?
Last Answer : Size and shape of the cavity.
Description : What is the primary purpose of a directional coupler?
Last Answer : Sampling energy within a waveguide.
Description : What is the primary purpose of a dummy load?
Last Answer : Absorb all energy without producing standing waves.
Description : . What primary condition must magnetic lines of force meet in order to exist?
Last Answer : Magnetic lines of force must form a continuous closed loop.
Description : What is the primary lower-frequency limitation of waveguides?
Last Answer : Physical size.
Description : What are the three primary colors of light?
Last Answer : Red, green and blue.
Description : What is the primary difference between the NPN and PNP amplifiers?
Last Answer : The polarity of the source voltage
Description : What two primary items determine the class of operation of an amplifier?
Last Answer : The amount of bias and the amplitude of the input signal
Description : The leads to the primary and the high-voltage secondary windings of a power transformer usually are of what color?
Last Answer : Primary leads-black; secondary leads red.
Description : What is the name of the emf generated in the primary that opposes the flow of current in the primary?
Last Answer : . Self-induced or counter emf
Description : What is the primary purpose of a synchro system?
Last Answer : Precise and rapid transmission of data between equipment and stations.
Description : What is one of the primary advantages of the FET when compared to the bipolar transistor?
Last Answer : High input impedance.
Description : What is the primary difference between the radio horizon and the natural horizon?
Last Answer : Sea water.
Description : What is the primary advantage of power-amplifier transmitters over keyed-oscillator transmitters?
Last Answer : Frequency stability.
Description : What tube in a duplexer has the primary function of disconnecting the receiver?
Last Answer : Tr tube.
Description : What is the primary measurement application for tuning forks?
Last Answer : They are used to monitor fixed motor speeds.
Description : What government agency is responsible for monitoring our primary frequency standards?
Last Answer : The National Bureau of Standard
Description : What is the primary advantage of the shielded pair?
Last Answer : The conductors are balanced to ground.
Description : In addition to a primary coating, manufacturers add a layer of buffer material for what reasons?
Last Answer : To provide additional mechanical protection and preserve the fiber's inherent strength.
Description : What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors?
Last Answer : Larger microwave power outputs.
Description : What is the primary difference between the pump signal of a simple parametric amplifier and the pump signal of a nondegenerative parametric amplifier?
Last Answer : The pump signal of a nondegenerative parametric amplifier is higher than twice the input signal.
Description : What is the primary difference in construction between the basic magnetron and the negativeresistance magnetron?
Last Answer : The negative-resistance magnetron has a split plate
Description : What is the primary use of the twt?
Last Answer : Voltage amplification.
Description : What is the primary advantage of hybrid circuits?
Last Answer : Circuit flexibility
Description : What number harmonic is the primary harmonic distortion in magnetic tape recorders?
Last Answer : Third-order harmonic.
Description : What is the primary difference between a diode and a triode?
Last Answer : The triode contains a third element called the control rid.
Description : What is the primary function of an afc circuit?
Last Answer : It is used to accurately control the frequency of the oscillator.
Description : What is the primary purpose of a keyboard?
Last Answer : To enter or input alphanumeric character codes.