2A533A Volume 5 : Avionics System! Quiz

A time domain reflectometer (TDR) is a piece of wire and cable test equipment that uses electromagnetic wave pulses to test cables. It sends a pulse down the cable and measures the time it takes for the pulse to reflect back. By analyzing the reflected wave, the TDR can determine the length of the cable, locate any faults or disruptions in the cable, and measure the impedance or characteristic impedance of the cable. This makes it a valuable tool for troubleshooting and maintenance of cables in various industries such as telecommunications, networking, and electrical engineering.

The primary source of IR (infrared radiation) is the Sun. IR is a form of electromagnetic radiation that is emitted by objects due to their temperature. The Sun emits a significant amount of IR as it is a hot celestial body. This IR radiation is responsible for heating the Earth's surface and atmosphere. Other sources of IR include objects on Earth's surface, such as buildings and bodies of water, which absorb and re-emit the Sun's IR radiation. However, the Sun remains the primary source of IR due to its high temperature and continuous emission of this type of radiation.

The FLIR set tv video is sent to the data presentation group via the video distribution unit. This unit is responsible for distributing the video signal from the FLIR set tv to multiple destinations, such as the data presentation group. It ensures that the video signal is transmitted accurately and efficiently to the intended recipients, allowing them to view and analyze the FLIR data effectively. The video distribution unit acts as a central hub for managing and routing the video signal, making it an essential component in the FLIR system's overall functionality.

When putting the cover on a time-domain reflectometer, it automatically turns it off. This is likely a safety feature designed to prevent any accidental operation or damage to the device while it is covered. By automatically turning off, it ensures that the device is not left on and consuming power unnecessarily, extending its battery life.

When reading a schematic diagram, it is generally expected that the flow of information or electricity will be represented from left to right. This convention is followed in order to maintain consistency and make it easier for the reader to understand the circuit or system being depicted. By following the left to right flow, it becomes easier to trace the path of signals or current through the various components and understand the overall functionality of the diagram.

The shutter is the component of a steerable TV camera subassembly that protects the sensor from damage due to overexposure. It acts as a barrier between the sensor and the incoming light, controlling the amount of light that reaches the sensor. By opening and closing at specific intervals, the shutter ensures that the sensor is not exposed to excessive light, which can lead to overexposure and potential damage.

If the sampling gate or tunnel diode of a time-domain reflector is damaged, it indicates that voltages exceeding 5 volts were applied.

The correct answer is that the batteries have no danger of overcharging. This is because modern battery chargers are designed to prevent overcharging by automatically adjusting the charging current or voltage when the battery is fully charged. Therefore, leaving the batteries on charge for an indefinite period of time will not cause them to overcharge.

When the built-in test switch is in the SHTR position, the proper response of the steerable TV system is the closing of the camera shutter. This means that the camera shutter will be closed, preventing any further image capture or display. This response is likely a safety measure to ensure that the camera does not capture or display any sensitive or inappropriate content during the test mode.

The Steerable TV interfaces with the Servo control unit and video distribution unit (VDU) because these components are responsible for controlling the movement and positioning of the TV, as well as distributing the video signals to the TV. The Servo control unit controls the motors and actuators that allow the TV to be steered in different directions, while the VDU receives the video signals and sends them to the TV for display. Therefore, the Steerable TV needs to interface with both the Servo control unit and VDU in order to function properly.

The statement "Light and IR cannot be diluted" means that light and infrared (IR) radiation cannot be mixed or diluted with any other substance or medium. This is because light and IR are forms of electromagnetic radiation that travel in waves and do not require a medium to propagate. They can travel through empty space or transparent materials without being affected or diluted.

The RF transmission line test set (RFTLTS) is used to diagnose cable faults through distance to fault measurements. This means that the RFTLTS can determine the exact location of any faults or issues in the cable, allowing for targeted repairs or replacements. By measuring the distance to the fault, technicians can quickly and accurately identify the problem area, saving time and resources in the troubleshooting process.

The correct answer is ELEC-B. This switch position allows for a checkout of the steerable TV system on a low-light-level basis, representing a maximum gain condition.

CAL ADJ is the correct answer because it refers to the power meter control that compensates for a slight sensitivity associated with a particular type of power sensor. This control allows for calibration adjustments to be made to the power meter in order to account for any variations or inaccuracies in the power sensor's sensitivity. By using CAL ADJ, the power meter can be calibrated to provide more accurate and precise measurements, ensuring that the readings are reliable and consistent.

The Gain Control and iris switches on the manual light control are used to adjust the video quality of the steerable television based on the amount of light available in the environment. The Gain Control helps in adjusting the sensitivity of the camera to capture more or less light, while the iris switch controls the size of the aperture to regulate the amount of light entering the camera. By adjusting these settings, the user can optimize the video quality by balancing the light level and ensuring proper exposure.

The correct answer is ELEC-A. This switch position is used to test the steerable TV logic and video processor circuits.

To clear a MALF indication during steerable TV operation, you need to reset the mode switch to STBY (Standby) and back to OPR (Operate). This action will reset the system and clear the fault indication.

The Steerable TV auto light control circuit compensates for minor light variations in the video automatic gain. This means that the circuit adjusts the gain of the video signal to maintain a consistent level of brightness, regardless of changes in the ambient light conditions. By doing so, the circuit ensures that the displayed image remains clear and visible to the viewer, even in different lighting environments.

The properties of infrared radiation (IR) include having frequency and wavelength. IR is not caused by molecular friction; rather, it is a form of electromagnetic radiation that is emitted or absorbed by molecules and atoms due to changes in their energy levels. Molecular friction is not a property of IR but rather a mechanism through which heat is generated by the conversion of IR energy into thermal energy.

The signal data converter is the component that receives the video output from the sensor unit in a forward-looking IR set sensor. It is responsible for converting the analog video signal into a digital format, which can then be processed and transmitted for further analysis or display. The signal data converter plays a crucial role in ensuring that the video output from the sensor unit is compatible with other systems and devices.

The aircraft wiring diagrams are indexed in two ways: alphabetic and numeric. This means that the diagrams can be organized and accessed based on both alphabetical order and numerical order. The alphabetic index allows for easy navigation and retrieval of diagrams based on specific keywords or terms, while the numeric index enables users to locate diagrams based on their assigned numerical codes. This dual indexing system ensures efficient and systematic organization of the wiring diagrams, making them easily accessible for maintenance and troubleshooting purposes.

The steerable TV secondary electron conduction tube uses both magnetic and electrostatic focusing. Magnetic focusing is used to control the path of the electrons by applying a magnetic field, while electrostatic focusing is used to control the beam convergence by applying an electric field. This combination of magnetic and electrostatic focusing allows for precise control and manipulation of the electron beam in the tube.

When an automatic light control (ALC) shutdown command is initiated in the steerable TV, the system reverts to STBY mode. This means that the system goes into standby mode, indicating that it is no longer actively functioning or producing any output. The shutdown command causes the system to halt its operations and enter a dormant state until it receives further instructions or is manually restarted.

The correct answer for this question is front-to-rear tests. These tests are conducted to verify the performance of a steerable TV. By performing front-to-rear tests, the functionality and effectiveness of the steerable TV can be assessed. These tests involve examining the TV's performance from different angles and distances, ensuring that it can be adjusted and controlled smoothly in all directions. The results of these tests help in determining whether the steerable TV meets the required standards and specifications.

The correct answer is the nature of the controlling medium. This means that the main difference between visible light and IR energy lies in the characteristics of the medium through which they are controlled or propagated. The controlling medium for visible light is usually air or transparent materials, while for IR energy, it can be gases, liquids, or solids. This distinction in the nature of the controlling medium is what sets visible light and IR energy apart from each other.

The signal data converter is the component that provides an electrical interface between the aircraft display and sensor assembly in a forward-looking infrared (FLIR) set subsystem. It is responsible for converting the signal data from the sensor assembly into a format that can be displayed on the aircraft's display. This allows for real-time monitoring and analysis of the infrared imagery captured by the FLIR system.

The given display pattern of the time-domain reflectometer indicates a short in the cable. When the display starts in the upper left corner and drops down at mid-screen, it suggests that the signal is reflecting back from a point close to the beginning of the cable. The departure in the lower right indicates that the reflection is occurring near the end of the cable. This pattern is consistent with a short circuit, where the signal is being reflected back due to a direct connection between the conductors.

To access the alpha portion of the alphanumeric key in an RF Transmission line test set (RFTLTS), the key that is used is "SELECT". This key allows the user to choose or select specific options or functions on the test set, including accessing the alpha portion of the alphanumeric key. The "DELETE" key is used to remove or erase selected options, while the "ENTER" key is used to confirm or execute selected options.

The power meter needs to be set to match the line voltage you are using in order to accurately measure the power consumption. This is because different voltages require different settings on the power meter to ensure accurate readings. If the power meter is not set to match the line voltage, it may give incorrect measurements and potentially cause damage to the equipment being tested. Therefore, it is important to ensure that the power meter is properly configured before turning it on.

Before power is connected to the RF Transmission line test set (RFTLTS), it is important to ensure that the ON/POWER/OFF switch is in the OFF position. Additionally, a suitable grounding strap should be connected between the grounding lug on the right side of the RFTLTS unit and the aircraft. This is necessary to prevent any potential electrical hazards and ensure the safety of the equipment and personnel. Therefore, the correct answer is "Aircraft".

In a time domain reflectometer (TDR), the horizontal deflection on the cathode-ray tube represents distance. This means that as the TDR sends a signal down a cable or transmission line, any impedance changes or faults in the line will cause reflections. These reflections are then displayed on the cathode-ray tube, with the horizontal deflection indicating the distance to the impedance change or fault. Therefore, the correct answer is distance.

The TS-1843A transponder test set has two operating modes: TEST and RF, and TEST and monitor. In the TEST and monitor mode, the test set is able to perform tests on the transponder while also monitoring its performance. This mode allows for a comprehensive evaluation of the transponder's functionality and ensures accurate testing and monitoring of its signals.

The correct answer is 24 Hours. This is because leaving the battery in the TS-3977 transponder test set for more than 24 hours while it is idle can lead to battery drain and potential damage to the device. To prevent this, it is recommended to remove the battery if the test set is not being used for more than 24 hours.

The shutdown process in steerable TV automatic light control involves losing the high voltage reference signal. This is done to protect the camera tube assembly from potential damage or malfunction. By cutting off the high voltage reference signal, the system ensures that the camera tube assembly is not exposed to any excessive voltage or power that could harm its components. This protective measure helps to maintain the integrity and longevity of the camera tube assembly.

When zeroing the power sensor, pressing and holding the SENSOR ZERO switch helps to calibrate the sensor. Waiting for the digital readout to stabilize indicates that the sensor has reached a stable and accurate zero power measurement. This ensures that any subsequent power measurements taken by the sensor will be reliable and accurate.

The correct answer is 36 inch 50 ohm cable. This is because the time domain reflectometer (TDR) is used to measure the impedance and detect faults in a cable by sending a pulse down the cable and measuring the reflections. In order to accurately test the cable, it is important to use a cable with the same characteristics as the one being tested. Therefore, a 36 inch 50 ohm cable would be the appropriate standard to use for this purpose.

The TS-1843A test set can be used to check identification, friend or foe modes 1, 2, 3/A, and C.

The power meter displays the power in referenced decibels (dBm). This unit of measurement is commonly used in telecommunications and represents the power level relative to 1 milliwatt (mW). It provides a standardized reference point for power measurements, allowing for easier comparison and analysis of power levels.

When calibrating the power sensor, you adjust the CAL ADJ control so the digital readout indicates 1.00 mW. This means that the power sensor is correctly calibrated to measure power in milliwatts. Adjusting the control to this value ensures accurate power measurements in the desired unit.

The correct answer is 2 because the question is asking for the unit of the RF Transmission line test set that is the accessory kit. Therefore, the accessory kit is unit 2 of the RF Transmission line test set (RFTLTS).

The correct answer is ELEC-A. This switch position allows for a checkout of the steerable TV system on a high-light level basis, which means that it tests the system under conditions of maximum brightness or illumination. This helps to ensure that the system is functioning properly and can handle the highest possible levels of light.

The MLS test set is used to perform a GO/NO-GO verification of the installed MLS receivers. This means that the test set checks whether the receivers are functioning correctly and meeting the required standards. It ensures that the receivers are able to accurately receive and interpret signals from the MLS system. This verification process is important in ensuring the overall effectiveness and reliability of the MLS system.

A power sensor is used to determine the active frequency range and power range within the design parameters of a power meter. This sensor is specifically designed to measure the power of electrical signals and is commonly used in various applications such as telecommunications, electronics testing, and power monitoring. By using a power sensor, the power meter can accurately measure the power levels of signals within its specified frequency range and power range, ensuring that the measurements are within the design parameters of the device.

To use the first power level as a reference and store the reading, you would press the "dB REF" switch. This switch blanks the digital display and saves the current reading, allowing you to compare subsequent power levels to the reference level.

The ARM-184A TACAN test set is capable of measuring the tracking ability of TACAN range circuits up to a maximum distance of 132 NM. This means that the test set can accurately assess the performance and accuracy of TACAN systems within this range.

If the ARM-186 VOR ILS ramp test set AMBER power indicator is on, it indicates that the battery charge is low. Therefore, the remaining operation time on the battery charge is estimated to be between 0 to 1 hour.

The Allan key contained within the MLS test set is used to make RF power level calibrations. This means that it is used to adjust and set the power level of the radio frequency signals in the MLS system. Calibrating the power level is important to ensure accurate and reliable performance of the system.

If the ARM-186 VOR ILS ramp test set RED power lamp is illuminated, it indicates that the battery is low and needs to be recharged. The recommended minimum recharge time for the battery is 36 hours. This longer recharge time ensures that the battery is fully charged and ready for use, minimizing the risk of power failure during testing.

The correct answer is ELEC-A; Camera electronics. This position generates a BIT window, which is a display of Built-In Test results. If the window is not displayed, it suggests that there may be an issue with the camera electronics. Therefore, the appropriate action would be to remove the ELEC-A LRU (Line Replaceable Unit) for further inspection or troubleshooting.

The power meter is a device that is used to measure both absolute and relative power. Absolute power refers to the actual power value being measured, while relative power is the power value compared to a reference level. By measuring both absolute and relative power, the power meter provides a comprehensive understanding of the power being measured, allowing for accurate analysis and comparison of power levels.