Description : When a transmitter uses a high-power oscillator to produce the output pulse, what switches the oscillator on and off?
Last Answer : High-voltage pulse from the modulator.
Description : In an externally synchronized radar, what determines the prr of the transmitter?
Last Answer : The master oscillator.
Description : What type of radar transmitter power is measured over a period of time?
Last Answer : Average power.
Description : What width is the pulse radiated by fire-control tracking radar?
Last Answer : Very narrow.
Description : The ideal radar spectrum has what relationship to the carrier frequency?
Last Answer : Symmetrical above and below the carrier frequency.
Description : What controls transmitter pulse width?
Last Answer : The modulator.
Description : Where should the transmitter spectrum be located with respect to the receiver response curve?
Last Answer : In the center.
Description : The Doppler variation is directly proportional to what radar contact characteristic?
Last Answer : Velocity.
Description : What characteristic of a pulse does a peak detector sample?
Last Answer : Pulse amplitude or pulse duration
Description : A spectrum analyzer is designed to display what signal characteristic?
Last Answer : Amplitude versus frequency (the frequency domain of the signals).
Description : What is the range of earth terminal transmitter output power?
Last Answer : Up to 20 kilowatts.
Description : Which of the following systems is not used in radio detection and ranging? A. Frequency shift B. Frequency modulation C. Pulse radar D. Amplitude modulation
Last Answer : D. Amplitude modulation
Description : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Last Answer : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Description : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is A) 7.5 m B) 7.5 Km C) 75 m D) 750 m
Last Answer : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is 7.5 m
Description : Type of modulation used in TV broadcast visual transmitter. A. Pulse modulation B. DSBFC C. Vestigial sideband D. SSBFC
Last Answer : C. Vestigial sideband
Description : Explain direct sequence spread spectrum (DSSS) transmitter with block diagram.
Last Answer : In direct sequence, the serial binary data is mixed with a higher frequency pseudorandom binary code at a faster rate and the result is used to phase-modulate a carrier. The ... 1010 with odd parity. le of spread spectrum modulation and demodulation using PSK for primary modulation.
Description : What characteristic is determined by the time required for a voltage wave to travel from the input end of an artificial transmission line to the output end and back again?
Last Answer : Pulse width
Last Answer : Pulse width.
Description : . What is the normal source of dry air for a radar system?
Last Answer : Ship's central dry-air system
Description : The peak power of a radar depends on the interrelationship of what other factors?
Last Answer : Average power, pulse width, and prt.
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 : A self-synchronized radar system obtains timing trigger pulses from what source?
Last Answer : Transmitter.
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 : 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.
Description : Range-marker generators produce pulses based on what radar constant?
Last Answer : The radar mile (12.36 microseconds).
Description : What type of ranging circuit is most often used with a radar that requires extremely accurate range data?
Last Answer : Range gate or range step.
Description : What are the required radar inputs for proper indicator operation?
Last Answer : Triggers, video, and antenna information.
Description : What are the three fundamental quantities involved in radar displays?
Last Answer : Range, bearing, and elevation.
Description : Which beam of missile-guidance radar is very wide?
Last Answer : Capture beam.
Description : Tracking radar searches a small volume of space during which phase of operation?
Last Answer : Acquisition.
Description : Fire-control tracking radar most often radiates what type of beam?
Last Answer : A narrow circular beam.
Description : Why is the range capability of 3D radar usually less than the range of 2D radar?
Last Answer : Higher operating frequency
Description : What position data are supplied by 2D search radar?
Last Answer : Range and bearing.
Description : Air-search radar is divided into what two basic categories?
Last Answer : 2D and 3D.
Description : What is the shape of the beam of a surface-search radar?
Last Answer : Wide vertically, narrow horizontally.
Description : What limits the maximum range of a surface-search radar?
Last Answer : Radar horizon.
Description : A surface-search radar normally scans how many degrees of azimuth?
Last Answer : 360 degrees.
Description : Radar altimeters use what type of transmission signal?
Last Answer : Frequency modulated (fm).
Description : What type of radar provides continuous range, bearing, and elevation data on an object?
Last Answer : Track radar.
Description : What radar component permits the use of a single antenna for both transmitting and receiving?
Last Answer : Duplexer.
Description : What radar subsystem supplies timing signals to coordinate the operation of the complete system?
Last Answer : Synchronizer.
Description : The degree of bearing resolution for a given radar system depends on what two factors?
Last Answer : Beam width and range.