Display & Control Systems
Subelement D
Section 37
Display System Power Supplies
The display power supply provides the following:
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+18 volts DC for the pulse forming network.
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Correct Answer5 volts DC for logic circuits and ± 12 volts DC for analog and sweep circuits.
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80 volts AC for the antenna resolver circuits.
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All of the above
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The display power supply provides the following:
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5 volts DC for logic circuits.
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± 12 volts DC for analog and sweep circuits.
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17kV DC for the CRT HV anode.
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Correct AnswerAll of the above
The display power supply provides the following:
All of the above
The display power supply in a radar system is responsible for providing power to various components of the display unit. These components may include logic circuits, analog circuits, sweep circuits, and the CRT (Cathode-Ray Tube) high-voltage anode.
"5 volts DC for logic circuits": Logic circuits in the display unit typically require a low voltage supply, commonly around 5 volts DC, to power digital components such as microprocessors, memory, and other digital logic devices.
"± 12 volts DC for analog and sweep circuits": Analog and sweep circuits often require dual power supplies, usually around ±12 volts DC, to power operational amplifiers, analog signal conditioning circuits, and sweep generators.
"17kV DC for the CRT HV anode": The CRT in a radar display requires a high-voltage supply to accelerate electrons and create the visual display on the screen. The high-voltage anode voltage can be as high as 17,000 volts DC to accelerate the electrons sufficiently to produce a bright and clear display.
The display power supply is designed to provide these various voltage levels to different components, ensuring proper operation of the display unit in a radar system. Therefore, the correct answer is "All of the above" because the display power supply provides the required voltages for logic circuits, analog and sweep circuits, and the CRT high-voltage anode.
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In a display system power supply what is the purpose of the chopper?
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Correct AnswerIt acts as an electronic switch between the raw DC output and the inverter.
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It interrupts the AC supply line at a varying rate depending on the load demands.
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It regulates the 5 volt DC output.
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It pre-regulates the AC input.
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In a display system power supply, what is the purpose of the inverter?
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Inverts the polarity of the DC voltage applied to the voltage regulators.
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Provides the dual polarity 12 volt DC supply.
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Acts as the voltage regulator for the 5 volt DC supply.
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Correct AnswerProduces the pulsed DC input voltage to the power transformer.
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What would be a common switching frequency for a display system power supply?
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Correct Answer18 kHz
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120 Hz
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60 kHz
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120 kHz
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What display system power supply output would use a tripler circuit?
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The logic circuit supply.
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The sweep circuit supply.
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Correct AnswerThe HV supply for the CRT anode.
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The resolver drive
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