ET A School Radar Display – AN/SPA-25G Radar Indicator Group Practice Test

These questions are part of the practice quiz. Start practicing

• What function does RDV (NOT) perform in the radar video data path?
• On which CCA are the three dynamic Radar Memory Planes stored?
• What are the input electrical requirements for the AN/SPA-25G?
• What is the purpose of system initialization in regards to the system processor?
• Which signal initiates TV Read operations?
• What are the stand-up configuration dimensions for the AN/SPA-25G?
• The LVPS receives a 90kHz signal from which component?
• True or False: The local processor controls switch lightning operations?
• In the Video Channel Group, azimuth and range data are used to synchronize the digitized video with which data?
• What does 1A2A7A13DS10 being lit indicate?
• What are the security requirements for the AN/SPA-25G?
• What function does the Plot/1 switch perform?
• The 1A2A7A12 unit is associated with which function?
• Display brightness is controlled by which section of the front panel?
• Operator's Shelf, Illuminated is located at which unit?
• Within the Video Channel, which component handles coordinate conversion?
• Which of the following is NOT listed as a warfare mission supported by the AN/SPA-25G?
• Why is AZ SAFE (NOT) signal generated?
• Which three types of signals does the local processor generate?
• The digitized video, synchronized with range and azimuth data, is converted to Cartesian coordinates and stored on three dynamic Radar Memory Planes on which CCA?
• Which component provides the 90kHz reference for radar memory and TV timing?
• What voltage is being output by the HVPS to the CRT Anode?
• How many Dead Reckoning Analyzer (DRA) inputs does the Radar Display receive?
• Which CCA is designated 1A2A7A13?
• If LED DS4 through DS7 are illuminated, what do they indicate?
• On what assembly or subassembly of the AN/SPA-25G RADAR Indicator is the majority of interfacing connections made with external equipment?
• What are the input power requirements for the AN/SPA-25G?
• Which data does the system processor continuously process along with the PD (Synchro) range and bearing?
• What is the primary purpose of the AN/SPA-25G RADAR Indicator?
• Which factor is important to check when installing leads on capacitors to ensure proper orientation?
• LVPS output voltage to Memory Circuits?
• The Operator's Shelf, Illuminated is located at which unit?
• What is the purpose of the HVPS within the DA/CRT Group?
• Which are the five tactical mission types supported by the AN/SPA-25G?
• Which device is used to control the processing operations?
• Which designation corresponds to the True Bearing Lamp?
• What is the duration of the RADDS data stream?
• What assembly within the OCP contains digital controls (function switches)?
• Which unit provides multiple DC output voltages for the system?
• Which data path does the Graphics Generator (A11) use to produce the graphics data for the CRT?
• The RADDS data stream enters the AN/SPA-25G from which connector/input?
• The CRT has a raster scan rate described with 1125 horizontal lines, 40 frames per second, and a 2:1 interface. This results in which horizontal repetition rate and which horizontal line interval?
• Which of the following best describes the element that, together with internally generated graphics, forms the operator's interactive radar display?
• Operator's Shelf is located at which unit?
• Which statement correctly describes how the system processor handles PD range and bearing in relation to manual input data?
• Why is digital video converted back to analog in this system?
• LED 1A2A7A10DS3 is lit. What condition does this indicate?
• What is the primary purpose of the 1A2A7A10 Radar Memory and TV Timing Card?
• How many amperes are required to give a center scale deflection on the 1A2A9M1?
• Which component is identified as EC-4 in the blower group?
• Which LVPS component develops drive current for supply transformer T2?
• Which component has an accuracy specification of ±0.25% of the range in use or ±15 yards, whichever is greater?
• The component associated with the True Bearing Lamp is designated by which name?
• Which CCA is designated 1A2A7A10?
• Which card contains the memory where RDV writes received video data?
• The voltages for the blanking pulses are supplied by which device?
• Why must video and data be stored and altered in the system?
• Which of the following is NOT one of the five primary components of the system processor?
• The PROM capacity in this system is what total memory?
• RADDS stands for:
• What is the supplier part number for a replacement 1A2A7A1?
• Transient voltages such as static discharges can damage what type of components?
• How many pins does 1A3A4J17 have?
• List the part number for ordering a replacement 1A2A7A1.
• Which signal is NOT an HVPS input?
• What is the main purpose of the Low Pass Filters on the 1A2A7A13?
• Which CCA stores video data from the 1A2A7A13 Radar Video and Timing Card?
• Which radar trigger is the only one received from a conventional radar?
• Which display device is used to show radar video after it is converted to analog?
• RDV stands for which term in the system?
• The RADDS Data Stream duration is expressed in which unit?
• The function associated with 1A2A5A1S20 is which?
• T2 provides outputs to which LVPS assemblies?
• The 1A3A4J17 is a type of what?
• 1A2A9M1 is a ______ DC movement meter.
• Which assembly is used to monitor the ship's power?
• Which signal is not an output from the 1A2A7A20 RADDS I/O CCA?
• Within the Video Channel, which assembly handles radar memory and TV timing?
• Which set of dimensions matches the Sit-Down configuration?
• 1A2A9S1 is a ______ position switch, but only ______ of those are active.
• In the AN/SPA-25G, which abbreviation is used for an input component related to azimuth data?
• What signal is seen at 1A2A7A13TP5?
• Which component handles video signals in the AN/SPA-25G?
• What is the designation of the Coordinate Converter used in the AN/SPA-25G?
• The radar display operates on single-phase 115VAC at what frequency?
• Radar and video inputs are connected to which section of the front panel?
• Which input device enables drawing lines such as boat lanes or helo corridors on the PPI?
• 115VAC from the Filter Assembly feeds to which assemblies?
• The Voltmeter Assembly provides the operator with the means of monitoring ________.
• What is the nomenclature for 1A2A5S26?
• Transient voltages, such as static discharges, can damage what type of components?
• The data path for graphics generation on the CRT uses which processor?
• Which statement best describes the Graphics Display Instruction List?
• Which signal from the RT/AI group initiates the synchronization of Digital Video and Range Data from the System Processor?
• What are the functions of the TM from the RADDS input?
• The input data used to present a fully interactive display is correlated with which two elements?
• The designation 1A2A5A1S20 corresponds to which function?
• What are the voltages for the blanking pulses sent to the CRT control grid from the Video Amplifier (A9)?
• What is the purpose of refreshing the RAM in the System Processor?
• Which component is a primary component of the system processor?
• What is the maximum time between RAM refreshes in the System Processor?
• Azimuth data enters the radar display through which input?
• The function corresponding to 1A2A5R10 is which?
• Which device in the LVPS drives power to the T2 transformer?
• Within the Video Channel, which assembly handles radar video and timing?
• What is the nomenclature for 1A2A5R4?
• Which four main assemblies make up the Video Channel?
• What are the sit-down configuration dimensions for the AN/SPA-25G?
• Processed Azimuth Data (rotation-corrected) goes to which unit/address?
• On the RADDS I/O Interface board 1A2A7A20, which signal is extracted from the RADDS stream to produce sweep timing signals?
• OC/P in the AN/SPA-25G stands for?
• Which address carries rotation-corrected azimuth data in the system?
• What is the function of the local processor on the Operator Control Interface?
• What is the nomenclature for 1A2A5A1S4?
• What control is sent from the System Processor to the Graphics Generator that consists of blocks of instruction words that identify the type of graphics to be generated, their location, and other factors needed for processing?
• Function controls are located on which front panel section?
• Power and switch lighting are controlled from which section?
• What conducts all I/O communications for memory mapped, off board locations?
• The designation 1A2A5R10 corresponds to which function?
• What is the operating speed of the microprocessor?
• Which address is used to monitor the Gated Range Triggers?
• A single AN/SPA-25G RADAR Indicator can supply composite video to how many additional indicators?
• In operation, which indicator flickers to show radar video is present and being processed in A13?
• What three signals are output from the 1A2A7A20 RADDS I/O CCA?
• If you needed to restore the RADAR Indicator to its initial conditions, which control would you use?
• Which of the following is an input to the HVPS?
• The Gated Range Triggers are monitored at which address?
• When installing leads on electronic components such as capacitors, it is very important to pay attention to the _________ of the leads?
• What is the purpose of EMI Filter 1A3A2?
• Which signal is used to cause flashing of the function switches when applicable?
• What circuit(s) generate the timing and control signals for the GMP's?
• Where in the tech manual would you find the adjustments for Video Amplifier 1A2A7A9?
• Which of the following is NOT a front panel area?
• How many tactical mission types does the AN/SPA-25G support?
• Which statement correctly describes the 3 bit video signal seen at 1A2A7A13TP5?
• How many primary components are listed as the system processor?
• System Clocks are generated by which combination?
• What consists of four 256k by 8-bit chips in two sections?
• Which LVPS component supplies the input voltage to the rectifier supply A5 to filter and produce +5V DC for the System Processor memory circuits?
• What signal energizes 1A2A7A9K1?
• How many components are involved in the initialization process?
• In this display system, the High Voltage Power Supply (HVPS) primarily provides the high voltage to which CRT element?
• Which option below corresponds to the System Processor component?
• What troubleshooting indication will tell you data is NOT moving through the FIFO?
• What function(s) is/are performed by the Master Clear Switch?
• What signal informs the coordinate converter that video is available for storage?
• Azimuth Range Indicator is located at which unit?
• How many DC output voltages are developed by the LVPS 1A3PS2?
• Within the Video Channel, which assembly handles video amplification?
• Intermediate Extender Section is located at which unit?
• After leaving the RADDS I/O card, where in the Azimuth Data Processor is the 12-bit digital azimuth data sent?
• Which statement correctly describes the power and frequency of the radar display's supply?
• In the RADDS interface, the 64 input data bits are used as what?
• Which signal initiates TV Read operations?
• Which component creates graphics elements for display?
• Which CCA is designated 1A2A12?
• Which indicator shows BIT A13 FAIL when lit?
• How many analog signals can the Video Channel accept?
• Which designation corresponds to the OCP assembly that contains the digital controls (function switches)?
• What develops switching for T2?
• How many horizontal scanning lines are there per frame in the CRT specifications?
• Which diagnostic indicator is associated with BIT A13 failure?
• For which four mission tasks does the AN/SPA-25G handle range, bearing, and plotting?
• What is the main purpose of Coordinate Converter?
• Which CCA is designated 1A2A7A9?
• What is the maximum number of radar video inputs that can be viewed on the radar display at any given time?
• Which set of dimensions matches the Stand-Up configuration?
• What is the frame rate for outgoing composite video?
• What are the frequencies of the horizontal and vertical drive pulses provided to the Deflection Amplifier?
• Which front panel control is used to adjust the intensity of the radar video signals?
• What generated by a crystal-controlled oscillator and binary counters?
• Which component receives the Graphics Display Instruction List from the System Processor?
• The 1A2A7A12 unit also provides which feature to prevent holes in the radar picture?
• Which two signals are used to initialize and acknowledge the TV read cycle?
• What does 1A2A7A13DS6 flickering mean?
• Which signal begins the Sequencer/Controller operation on the Azimuth Processor?
• Which of the following is NOT a major functional area of the AN/SPA-25G?
• What is the third step in the six-step troubleshooting technique?
• What signal is used to determine the T0SET (NOT) and CONVBUSY (NOT) outputs during a RADAR Test BIT?
• What is the interface ratio described for the CRT?