O-Strand Radar Practice Test

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• Same range different bearing describes which radar property?
• Contrast pulsed radar with continuous-wave radar and give a typical application for each.
• Which of the following is an example of a phase-coded waveform used in radar systems?
• In range-Doppler processing, which windows are used to suppress sidelobes?
• Which radar component is based on the timing?
• Radar Cross Section (RCS) is best described as?
• What is the term for the ability to distinguish between the same targets but different bearing?
• When high voltage is applied to the Selected PFN, what happens?
• How does pulse width affect range resolution, and what is the formula?
• What systems does a basic pulse RADAR system contain?
• What are the three basic types of Search RADAR?
• What is the advantage of using a balanced crystal mixer?
• What is dynamic range in radar receivers and why is it important?
• In bistatic geometry, what changes compared to monostatic?
• Which radar method uses continuous energy without pulsing?
• Which method is commonly used to suppress weather clutter in radar systems?
• Which term is defined as the reception from a previous pulse that may coincide with closer targets?
• Which calibration target is widely used because it provides a known radar cross-section?
• Which of the following is NOT listed as a function of Airborne RADAR?
• What is the primary purpose of using a two-dimensional range-Doppler map in radar processing?
• Relative bearing refers to which of the following?
• What is the synchronizer and what does it deal with?
• Relative bearing refers to which of the following?
• Which of the following is NOT one of the four radar methods?
• The heading marker pulse is produced by which device?
• In a typical radar tracking system, which sequence correctly describes track initiation, track confirmation, and track maintenance?
• Explain how range resolution can be improved without shortening pulse width using techniques like fractional bandwidth or coded waveforms?
• Which statement best describes a radar unit that remains functional but with incomplete output signal reception?
• STC stands for which radar term?
• Which technique is used to suppress jammers in radar processing?
• What is the purpose of COAC?
• How does aspect angle influence Radar Cross Section (RCS) and detection probability?
• Which card produces the reference sweep and the negative/positive sweep gates when triggered by the sync trigger?
• What type of radar is designed to meet strict weight and space limitations?
• How does the detection threshold affect true detections and false alarms?
• Which term describes reducing the gain of selective IF amplifier stages for large target returns?
• What is waveform diversity and why is it used in radar systems?
• What functions does Airborne RADAR serve?
• Which trigger initiates the gating of the sweep generator to produce measurement gates?
• What does coherent integration do in radar reception, and how does it affect SNR?
• Tracking RADAR is also known as which RADAR type?
• Name two common window functions used to reduce sidelobes and indicate where applied.
• What is a trihedral corner reflector and what is it used for in radar calibration?
• Describe track formation and the role of a Kalman filter.
• In radar tracking, how is a new track created?
• What is Moving Target Indicator (MTI) and how does it suppress stationary clutter?
• Which type of radar provides velocity information about targets?
• Which unit processes signals from other radar systems and aircraft systems to produce a display?
• How do atmospheric conditions influence radar propagation and what mitigation strategies exist?
• Which radar is used primarily as fire control radar?
• The A3A1 card produces trigger pulses at PRFs of 600, 700, 800, or 1000 Hz. Which option shows these PRFs?
• Which radar type is optimized for velocity-based tracking?
• Which factors influence radar cross section (RCS) of a target?
• What cancels out MOST local oscillator noise?
• What does a Plan-Position Indicator (PPI) display show?
• What is a track gate, and how does it influence data association?
• Radar is used to detect the presence of objects and determine three specific attributes. Which are they?
• Which card is responsible for generating the 50 ns wide pulses used to gate timing?
• Why is antenna calibration important and what measurements are typically calibrated?
• Which unit outputs the required display by processing signals from other radar units and aircraft systems?
• When a unit is not receiving all of your monitored output signals, what status would you assign?
• Difference between digital and analog beamforming in radar.
• The sweep generator card produces the reference sweep, negative sweep gate, and positive sweep gate when triggered by what?
• What does a dummy load do?
• In radar terms, what does Sweep refer to?
• What does cross-polarization discrimination (XPD) indicate in radar measurements?
• Which statement best describes synthetic bandwidth in radar?
• Coherent radar processing relies on phase stability to enable which technique?
• Which cockpit indication is shown when the radar digital computer fails its built-in test?
• The negative sweep gate and positive sweep gate are produced by the Sweep Generator Card when triggered by which signal?
• Radar cross section (RCS) is defined as what?
• The A3A1 Master Trigger Generator Card can produce trigger pulses at PRFs of which values?
• What is the difference between an azimuthal scan and an elevation scan in a surveillance radar?
• The duration of the modulator pulse is determined by which switch?
• How do Range-Doppler processing and time-domain pulse detection differ in radar signal processing?
• What is track-while-scan (TWS) in radar operation?
• What is the purpose of FTC?
• Which mitigation technique is commonly used to reduce false alarms from ground returns?
• Which radar type is associated with velocity-based target detection and tracking?
• In the Tracking RADAR operation sequence, which phase comes after Acquisition?
• Which factor does NOT limit angular resolution?
• Which function is included in Airborne RADAR capabilities?
• What does an Indicator do?
• Height-Finding is one of the three basic types of which radar category?
• In agile operation, the magnetron frequency is commonly varied to what range?
• All radar functions are synchronized either directly or indirectly by what?
• Which device is the local oscillator associated with a special vacuum tube?
• What is Approach RADAR used for?
• Radar acronym meaning?
• What does dual-polarization weather radar provide that enhances precipitation measurements?
• Differential phase Z_DP is used to estimate which aspect of precipitation?
• What are the possible maximum range settings on the RANGE SELECT switch?
• Which component receives the Master Trigger and ensures synchronized triggering of all units?
• The Sweep Generator Card (A3A2) produces which outputs when triggered by the sync trigger?
• In radar calibration, what does a known RCS target primarily help verify?
• Which term describes the operation that emphasizes the leading edge and deemphasizes the remaining video?
• What is the local oscillator with a special vacuum tube called?
• What is a cursor?
• Which statement best describes the function of the Signal Control/Generator Card?
• A higher transmitted bandwidth improves range resolution because the range resolution is inversely related to bandwidth.
• Which mechanism reduces the gain of the IF preamplifier stage immediately after the transmitter fires?
• What is processing gain in radar, and how is it quantified for N integrated pulses?
• Which expression gives the velocity unambiguous limit for a given PRF and wavelength?
• Which device provides automatic tilt stabilization for aircraft pitch and roll maneuvers?
• In the radar system, which unit produces the cockpit display by processing signals from other radar systems and aircraft subsystems?
• What is one reason to use dual-polarization in radar systems?
• What happens when the master trigger is triggered?
• In a radar simulator, which parameter most directly affects the realism of environmental clutter?
• Which card produces pulses that are 50 ns wide?
• How does PRF determine range and velocity unambiguity?
• What is range cell migration (RCM) and why is it a concern in Doppler processing?
• What type of radar is commonly used by ATC?
• State the Doppler shift equation for a target moving with radial velocity v and wavelength λ.
• What is required for coherent integration to be effective?
• How does an automatic gain control (AGC) system influence radar performance in varying clutter conditions?
• What is a phase-coded waveform and how does it improve resolution or range-Doppler performance?
• Define beamwidth and explain how antenna aperture influences it.
• What does a simulated Gyro provide?
• Pulse width options depend on which PFN is selected by the PULSE SELECT switch on the RSC; which of the following describes the available options?
• If PRF is increased, what happens to the range unambiguous limit R_amb?
• What is Space-Time Adaptive Processing (STAP) and its purpose?
• Differential reflectivity Z_DR is used to estimate which aspect of precipitation?
• In radar reception, what does the matched filter do and why?
• True bearing is defined relative to which reference direction?
• Doppler clutter and mitigation via MTI or Doppler processing.
• During test node, the fire control digital computer runs what two mode tests?
• Which unit processes signals from other radar units and aircraft systems to produce the required display?
• Maximum radar range is directly related to which factor?
• What determines a radar's minimum range?
• Which signal serves as the master timing source for all radar functions?
• What is the purpose of a radar simulator and what parameters should it reproduce?
• What does the 30 second delay accomplish in the radar system?
• Maximum range is directly related to which factor?
• What does radar do?
• What is CFAR and how does it adapt detection thresholds?
• What is a Doppler notch filter and when would you use it?
• What does track maintenance do in a radar tracking system?
• How does phase-shifter-based electronic scanning enable rapid beam steering?
• Which of the following describes the tests run by the fire control digital computer during test node?
• What is the operational characteristic of a pulse radar system?
• Which parameter describes the separation of two targets at the same range but different bearing?
• Which basis does a pulse radar system use for detecting and tracking targets?
• Which option correctly lists the four methods of radar transmission?
• Which statement best describes the operation of a pulse radar system?
• Which statement best describes how the PFN selection influences pulse width?
• Summarize the role of a radar simulator in training and development and list key parameters to reproduce.
• Where is a microswitch located and what does it do?
• What is the phase center, and why is phase stability important for coherent radar?
• What are the three phases of operation for the Tracking RADAR?
• True bearing is measured with reference to which direction?
• Which status indicator would appear if the radar's built-in test fails?
• In a monostatic radar, transmitter and receiver share the same antenna; the range equation gains simplify to what?
• In AGILE operation, by how much is the magnetron frequency varied around the selected frequency?
• Which of these is a valid maximum range setting on the RANGE SELECT switch?
• Same bearing different ranges describes which radar property?
• What prevents RF energy from being transmitted?
• What is a clutter map and how is it used in adaptive detection?
• MTI stands for Moving Target Indication; what is its goal?
• Clutter is unwanted radar returns. Name two common clutter types.
• What is the standard monostatic radar range equation for received power, including gains and losses?
• Which of the following is NOT a common calibration target for radar?
• Which RADAR is used to guide aircraft to a safe landing in zero visibility conditions?
• Which two numbers represent the mode tests run by the fire control digital computer during test node?
• What is the role of the transmit/receive switch in pulsed radar?
• What is the operational characteristic of a pulse Doppler radar system?
• When a unit is not receiving all of its monitored input signals, what does that mean?
• Which of the following describes the basic ways missiles use RADAR?
• What is the primary difference between a surveillance radar mode and a tracking radar mode?
• Radar beam width is defined by which points?
• What are Range Marks?
• Monostatic vs bistatic radar geometries: which is true?
• Which radar method works well for stationary objects?
• PFN stands for which term in radar systems?
• Which statement accurately defines azimuth and elevation scanning and contrasts mechanical vs electronic scanning?
• Which radar method provides velocity information via Doppler shift?
• Which radar type guides aircraft during landing when visibility is near zero?
• How does polarization impact radar performance and what are common polarization pairings?
• Ambiguous Return occurs when which phenomenon is observed?