Ato Test 1 Notes Exam |73 Questions and
Answers 2025
Electrical Communications - -Communications over a distance that involves
only transmission, emission, or reception of signs, signals, writings, images,
or sounds, by electromagnetic means.
- Radio Communications - -Describes teletypewriter, voice, telegraphic, and
facsimile communications.
- Radio Frequency (RF) - -Any frequency of electromagnetic energy capable
of transmission into space. Ranges between 3kHz to 300GHz
- Intelligence - -Information or data that is intelligible to our sense normally
audio or video.
- Modulation - -The process of impressing the intelligence upon a
transmission medium.
- Demodulation - -The process of removing the intelligence from a received
signal.
- Heterodyning - -The process of mixing 2 signals to produce THE SUM, THE
DIFFERENCE, AND THE TWO ORIGINALS.
- Amplitude Modulation (AM) - -Method of varying the amplitude of an
electromagnetic carrier in accordance w/ the intelligence to be transmitted.
- Frequency Modulation (FM) - -Any Method of varying the frequency of an
electromagnetic carrier in accordance w/intelligence to be transmitted.
- Continuous Wave Modulation (CW) - -is essentially on-off keying of an RF
carrier. Basic Form of RF communication.
- High Frequency (HF) - -3MHz-30MHz
- Very High Frequency (VHF) - -30MHz-300MHz
- Ultra High Frequency (UHF) - -300Mhz-3GHz
- Teletypwriter - -Signals Transmitted by landline(wire), cable, or radio.
- One-Way Communication - -Transmitter and Antenna on one end
Receiver and Antenna on other end
, - Two-Way Communication - -Communication in both directions.
Transmitter, receiver, and antenna at each point.
- Antenna - -A conductor or set of conductor used to radiate RF energy into
space, to collect RF energy from space or to do both.
- Microphone - -A device that converts sound energy into electrical energy.
- Speaker/Headset - -A device that converts electrical energy into sound
energy.
- Transmitter Fundamentals: Basic Function - -Must radiate RF energy at a
specific frequency for communications to be dependable.
- 3 Types of Transmitters - -Am: Amplitude Modulated
FM: Frequency Modulated
SSB: Single Sideband - Most commonly used in Military Aircraft.
- Attenuation - -The weakening of a signal due to atmospheric or system
losses.
- Varactor - -Used to vary the frequency of the oscillator in accordance with
the input AF from the microphone.
- Single Sideband: Disadvantages - -Complex
Expensive
- Receiver Functions - -1.Reception:
2. Selection:
3.Detection:
4.Reproduction:
- Reception - -Occurs when a transmitted electromagnetic wave passes
through the antenna and induces voltage in the antenna.
- Selection - -The action of selecting a particular frequency from all other
frequencies at the antenna.
- Detection - -The action of separating the audio frequency intelligence from
the radio-frequency carrier.
- Reprodcution - -The action of converting the electrical signals to sound
waves, which can then be interpreted by your ear as a speech or music.
- Trouble Shooting Steps - -1.Symptom Recognition
Answers 2025
Electrical Communications - -Communications over a distance that involves
only transmission, emission, or reception of signs, signals, writings, images,
or sounds, by electromagnetic means.
- Radio Communications - -Describes teletypewriter, voice, telegraphic, and
facsimile communications.
- Radio Frequency (RF) - -Any frequency of electromagnetic energy capable
of transmission into space. Ranges between 3kHz to 300GHz
- Intelligence - -Information or data that is intelligible to our sense normally
audio or video.
- Modulation - -The process of impressing the intelligence upon a
transmission medium.
- Demodulation - -The process of removing the intelligence from a received
signal.
- Heterodyning - -The process of mixing 2 signals to produce THE SUM, THE
DIFFERENCE, AND THE TWO ORIGINALS.
- Amplitude Modulation (AM) - -Method of varying the amplitude of an
electromagnetic carrier in accordance w/ the intelligence to be transmitted.
- Frequency Modulation (FM) - -Any Method of varying the frequency of an
electromagnetic carrier in accordance w/intelligence to be transmitted.
- Continuous Wave Modulation (CW) - -is essentially on-off keying of an RF
carrier. Basic Form of RF communication.
- High Frequency (HF) - -3MHz-30MHz
- Very High Frequency (VHF) - -30MHz-300MHz
- Ultra High Frequency (UHF) - -300Mhz-3GHz
- Teletypwriter - -Signals Transmitted by landline(wire), cable, or radio.
- One-Way Communication - -Transmitter and Antenna on one end
Receiver and Antenna on other end
, - Two-Way Communication - -Communication in both directions.
Transmitter, receiver, and antenna at each point.
- Antenna - -A conductor or set of conductor used to radiate RF energy into
space, to collect RF energy from space or to do both.
- Microphone - -A device that converts sound energy into electrical energy.
- Speaker/Headset - -A device that converts electrical energy into sound
energy.
- Transmitter Fundamentals: Basic Function - -Must radiate RF energy at a
specific frequency for communications to be dependable.
- 3 Types of Transmitters - -Am: Amplitude Modulated
FM: Frequency Modulated
SSB: Single Sideband - Most commonly used in Military Aircraft.
- Attenuation - -The weakening of a signal due to atmospheric or system
losses.
- Varactor - -Used to vary the frequency of the oscillator in accordance with
the input AF from the microphone.
- Single Sideband: Disadvantages - -Complex
Expensive
- Receiver Functions - -1.Reception:
2. Selection:
3.Detection:
4.Reproduction:
- Reception - -Occurs when a transmitted electromagnetic wave passes
through the antenna and induces voltage in the antenna.
- Selection - -The action of selecting a particular frequency from all other
frequencies at the antenna.
- Detection - -The action of separating the audio frequency intelligence from
the radio-frequency carrier.
- Reprodcution - -The action of converting the electrical signals to sound
waves, which can then be interpreted by your ear as a speech or music.
- Trouble Shooting Steps - -1.Symptom Recognition
