Description : Which of the basic timing circuits produces sharp trigger pulses directly?
Last Answer : Blocking oscillators.
Description : In an externally synchronized radar, what determines the prr of the transmitter?
Last Answer : The master oscillator.
Description : In a bistable multivibrator, how many trigger pulses are needed to produce one complete cycle in the output?
Last Answer : Two.
Description : What radar subsystem supplies timing signals to coordinate the operation of the complete system?
Last Answer : Synchronizer.
Description : Range-marker generators produce pulses based on what radar constant?
Last Answer : The radar mile (12.36 microseconds).
Description : What basic circuits meet the requirements of an externally synchronized master oscillator?
Last Answer : Sine-wave oscillator, single-swing blocking oscillator, and master trigger (astable) multivibrator.
Description : What generator characteristics must be considered when alternators are synchronized for parallel operation?
Last Answer : Output voltage, frequency, and phase relationships.
Description : . What is the normal source of dry air for a radar system?
Last Answer : Ship's central dry-air system
Description : OSS stands for: a) Open System Service b) Open Source Software c) Open System Software d) Open Synchronized Software
Last Answer : Answer: b Explanation: OSS stands for open source software. OSS allows any user to download, view, modify and redistribute the software. Also, the user can fix bugs according to needs
Description : The timer element found in a reverse power relay obtains its operating torque via _____________. A. line voltage B. the main bus C. electromagnets D. a separate battery source
Last Answer : Answer: C
Description : Radar transmits short pulses of high frequency called A. Infrared waves B. Radio waves C. Ultraviolet waves D. Sound waves
Last Answer : ANSWER: B
Description : The sensor that sends out sound pulses called pings, then receives the returning sound echo is called A : Active Sonar B : Passive Sonar C : Radar D : Laser Rangefinder
Last Answer : A : Active Sonar
Description : The sensor that sends out sound pulses called pings, then receives thereturning sound echo is called A : Active Sonar B : Passive Sonar C : Radar D : Laser Rangefinder
Description : Why is it important to minimize TBE jitter in magnetic tape recordings where precise timing relationships exist between two or more signals?
Last Answer : The jitter could cause noise and a loss of accuracy.
Description : How can the loss of timing occur in NRZ line coding?
Last Answer : If long strings of 1s or 0s are present causing a lack of level transitions.
Description : How many clock pulses are required to output a 4-bit number in serial form?
Last Answer : Four.
Description : . What type of counter has clock pulses applied to all FFs?
Last Answer : Synchronous.
Description : Which receiver component converts the IF pulses to video pulses?
Last Answer : Detector.
Description : what causes the initial and final pulses on the receiver output signal?
Last Answer : Leakage from the duplexer.
Description : Current that flows in pulses in the same direction is called
Last Answer : Pulsating dc
Description : What method for encoding digital data enables you to store more data in less space by limiting the distance between pulses on a hard disk?
Last Answer : Run length-limited (RLL) encoding.
Description : Which method of digital data encoding does NOT return the tape to neutral between pulses but, instead, saturates the tape positively or negatively as the incoming data changes between zero and one?
Last Answer : Non-return-to-zero (NRZ) encoding.
Description : Which digital data encoding method records a digital one as a positive pulse and a digital (zero) as a negative pulse and returns the tape to neutral between pulses?
Last Answer : Return-to-zero (RZ) encoding.
Description : What format of digital tape recording takes a serial input stream of data pulses, breaks them up, and records them on more than one data track?
Last Answer : Serial-parallel digital magnetic tape recording.
Description : In digital magnetic tape recording, the series of recorded digital pulses can represent what three types of data?
Last Answer : a. Data used by digital computers. b. Pulsed squarewave signals. c. Digitized analog waveforms.
Description : What is the purpose of the majority of circuits in a radar system?
Last Answer : Timing and control.
Description : What is the purpose of the synchronizer in a radar system?
Last Answer : Controls system operation and timing.
Description : The degree of bearing resolution for a given radar system depends on what two factors?
Last Answer : Beam width and range.
Description : What term is used to describe the ability of a radar system to distinguish between targets that are close together?
Last Answer : Target resolution
Description : Why are time-domain reflectometers often compared to a radar system?
Last Answer : Both transmit a pulse and analyze the signal reflection.
Description : A _________ digital signal includes timing informationin the data beingtransmitted. A) self-synchronizing B) self-modulated C) self-transmitted D) none of the above
Last Answer : self-synchronizing
Description : Peristalsis is the process of synchronized contractions of the muscular wall of the digestive tube. Peristaltic movements may occur from the esophagus until and including the bowels. The ... and megaesophagus (enlargement of the esophagus). Digestion System - Image Diversity: peristaltic movements
Last Answer : From the lumen to the external surface what are the tissues that form the digestive tube wall?
Description : The alarm system for an engine order telegraph uses small selsyn motors attached to the indicators. The alarm sounds when the rotors are _____________. A. in synchronous position, no current is flowing, ... and the relays are open D. not synchronized, current is flowing, and the relays are closed
Last Answer : Answer: D
Description : The peak power of a radar depends on the interrelationship of what other factors?
Last Answer : Average power, pulse width, and prt.
Description : The ideal radar spectrum has what relationship to the carrier frequency?
Last Answer : Symmetrical above and below the carrier frequency.
Description : The spectrum of a radar transmitter describes what characteristic of the output pulse?
Last Answer : Frequency distribution
Description : Which of the two types of automatic gain control, agc or iagc, is most effective in radar use for the Navy?
Last Answer : IAGC.
Description : What IF frequencies are normally used in radar receivers
Last Answer : Thirty or sixty megahertz.
Description : What type of receiver is most often used in radar systems?
Last Answer : Superheterodyne.
Description : What type of modulator is most commonly used in modern radar systems?
Last Answer : Line-pulsed.
Description : What type of multivibrator can be used as a radar master oscillator?
Last Answer : Free-running.
Description : Which of the two general classes of antennas is most often used with radar?
Last Answer : Directional.
Description : What radar scope uses a range step for range measurement?
Last Answer : The A scope.