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 is the primary purpose of a synchro system?
Last Answer : Precise and rapid transmission of data between equipment and stations.
Description : When an operating system prompt (A>) is displayed on the screen, what do you enter from the keyboard to load an application program?
Last Answer : The program name.
Description : What are the primary disadvantages of the magic-T?
Last Answer : Low power-handling capability and power losses
Description : What two variables determine the primary frequency of a resonant cavity?
Last Answer : Size and shape of the cavity.
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 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 : What are the two primary disadvantages of a two-wire open line?
Last Answer : High radiation losses and noise pickup.
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 advantage of a ratio detector?
Last Answer : Suppresses amplitude noise without limiter stages.
Description : Primary storage capacities are usually specified in what unit of measure?
Last Answer : Number of bytes.
Description : What area in the computer's primary storage area holds the processing instructions (the program)?
Last Answer : Program storage area.
Description : What is the primary use of a megger?
Last Answer : To measure high resistance.
Description : What factors should be considered when selecting a primary cell for a power source?
Last Answer : Cost, size, ease of replacement, and voltage or current needs. b. Capacitance is the property of a circuit which opposes changes in voltage.
Description : In the primary cell, why are negative ions attracted to the negative terminal of the cell?
Last Answer : The positive charge caused by electrons leaving the negative electrode attracts the negative ions.
Description : What is the primary advantage of the electrodynamometer type meter over the D’Arsonval-type meter?
Last Answer : The electrodynamometer-type meter can be used to measure both ac and dc currents.
Description : What is the primary disadvantage of the pointer arrangement for indicating coil rotation?
Last Answer : Coil balance.
Description : What is the primary advantage of using a current probe?
Last Answer : Current probes enable you to perform current measurements without disconnecting wires. Current probes are clamped around the insulated wire.
Description : What is the primary reason for the development of the turnstile antenna?
Last Answer : For omnidirectional vhf communications.
Description : What is the primary cause of broadside arrays losing efficiency when not operating at their designed frequency?
Last Answer : Lower radiation resistance.
Description : What is the primary difference between the major and minor lobes of a radiation pattern?
Last Answer : Major lobes have the greatest amount of radiation.
Description : . What is the primary advantage of an fsk transmission system?
Last Answer : Resistance to noise interference.
Description : What is the primary advantage of pulse-modulation systems?
Last Answer : . Low susceptibility to noise.
Description : What is the primary component for a spark-gap modulator?
Last Answer : Either a fixed spark gap that uses a trigger pulse to ionize the air between the contacts, or a rotary gap that is similar to a mechanical switch.
Description : What is the purpose of a lacing shuttle?
Last Answer : To keep the tape or cord from fouling during the lacing operation.