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20 Cards in this Set
- Front
- Back
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Static dischargers help eliminate interference by dissipating static electricity into the atmosphere at: |
Low current levels |
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Used for voice communications from one point to another within the aircraft:- |
Interphone |
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The satellite that is used as a relay to extend communication distance is called as: |
Repeater satellite |
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The transmitter-receiver combination in the satellite is known as:- |
Transponder |
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What is the reason for carrying multiple transponders in satellite:- |
More number of operating channel |
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What is the reason for shifting from C-band to Ku-band in satellite communication:- |
Overcrowding |
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Aircraft Communication Addressing and Reporting System (ACARS) is a digital data link transmitted in the:- |
Very High Frequency Range |
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The Passenger Address (PA) system is primarily a safety system that provides passenger with:- |
Voice announcement and chime signals |
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What happens to a radio wave as it passes from one medium into another medium changes direction? |
It is refracted |
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A surface wave follows the curvature of the Earth due to which process? |
Diffraction |
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What type of polarization is used for ground waves? |
Vertical Polarization |
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Which one of the following is not type of modulation? |
Pulse Modulation |
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In amplitude modulation, which of the following varies? |
Amplitude of the carrier wave |
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The Solid State Voice Recorder (SSVR) on large aircraft has to be able to retain the recorded data for a minimum of the last:- |
25 hours of its operation |
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Lateral acceleration and radio altitude are typically recorded on the:- |
Flight Data Recorder |
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The Flight Data Recorder (FDR) must start to record data automatically:- |
Prior to the aircraft being capable of moving under its power |
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Multiplexing is a techniques used for:- |
Reducing the amount of IFE wiring to a seat position |
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A device that can both transmit and receive is called as:- |
Transceivers |
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What generates the final carrier frequency? |
Oscillator |
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When must the Emergency Locator Transmitter (ELT) battery be replace (other than reading the replacement date)? |
When the transmitter has been in use for more than one cumulative hour |
