Term
| Process of exchanging information |
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Definition
| What is the given definition of communication? |
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Term
Transmitter
information
receiver |
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Definition
| List the three parts of communication. |
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Term
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Definition
| a one way transmission system is referred to as a _________ system. |
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Term
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Definition
| List two types of two way transmission systems. |
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Term
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Definition
| which two way communication system uses transceivers that can both transmit and receive but not at the same time? |
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Term
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Definition
| Which two way communication system has the ability to transmit and receive at the same time? |
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Term
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Definition
| what form does intelligence take when transmitted into free space? |
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Term
atomospheric - lighting
galactic - sun spots
man-made - rotating electric machinery
thermal agitation- internal circuitry of a receiver |
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Definition
| Noise is any random signal that interferes or degrades the original signal and can take any of the what forms? |
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Term
Radio/TV
microwave
infrared
visible
ultraviolet
x rays
gamma rays |
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Definition
| The frequency spectrum is the range of electromagnetic signals encompassing all frequencies. List the seven regions of the spectrum region. |
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Term
space wave (aka direct wave)common in LF or MF
ground wave (aka surface wave) common in VHF
sky wave common in HF |
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Definition
| Name the three paths for propagation of a radio wave. |
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Term
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Definition
| Name the two functions of a transmitter. |
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Term
| Audio Amplifier, Driver/Filter |
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Definition
| In a transmitter, which two stages adjust the audio signal before it is converted to RF? |
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Term
intellegent/audio signal
base/ carrier signal |
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Definition
| The modulator in a transmitter receives which two signals? |
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Term
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Definition
| This circuit amplifies the signal to the required level for transmission into free space. |
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Term
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Definition
| A receiver's ability to extract the intelligence from the carrier is__________. |
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Term
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Definition
| Which circuit determines the operating frequency of the receiver? |
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Term
Sum of both originals
Difference of both originals
Received RF
LO Frequency |
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Definition
| What are the output of the mixer circuit in a receiver? |
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Term
| convert the audio signal into sound waves the ear can hear. |
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Definition
| What does the speaker do? |
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Term
VLF 3kHz-30kHz
LF 30kHz-300kHz
MF 300kHz-3MHZ
HF 3MHZ - 30MHz
VHF 30MHz - 300 MHz
UHF 300 MHz - 3 GHz
SHF 3 GHz - 30 GHz
EHF 30 GHz - 300 GHz |
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Definition
| Name the 8 bands and their frequency ranges that the coast guard uses. |
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Term
VLF 3kHz-30kHz OMEGA
LF 30kHz-300kHz LORAN
MF 300kHz-3MHZ Direction Finding Equipment
HF 3MHZ - 30MHz Voice
VHF 30MHz - 300 MHz Close Proximity Voice
UHF 300 MHz - 3 GHz Aircraft and Satellite
SHF 3 GHz - 30 GHz RADAR
EHF 30 GHz - 300 GHz Secure Satellite |
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Definition
| Name the purpose of all the frequency bands in the coast guard. |
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Term
| Very Low Frequency 3kHZ - 30kHz |
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Definition
| What does VLF stand for and what frequency range is it? |
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Term
| Low Frequency 30 kHz - 300 kHz |
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Definition
| What does LF stand for and what frequency range is it? |
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Term
| Medium Frequency 300 kHz - 3 MHz |
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Definition
| What does MF stand for and what frequency range is it? |
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Term
| High Frequency 3MHZ - 30MHz |
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Definition
| What does HF stand for and what frequency range is it? |
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Term
| Very High Frequency 30 MHz - 300 MHz |
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Definition
| What does VHF stand for and what frequency range is it? |
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Term
| Ultra High Frequency 300 MHz - 3 GHz |
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Definition
| What does UHF stand for and what frequency range is it? |
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Term
| Super High Frequency 3GHz - 30 GHz |
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Definition
| What does SHF stand for and what frequency range is it? |
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Term
| Extremely High Frequency 30 GHz - 300 GHz |
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Definition
| What does EHF stand for and what frequency range is it? |
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Term
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Definition
| Radio __________ is a term used to describe how radio waves will behave when they are transmitted into free space. |
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Term
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Definition
| The standard bandwidth of a transmitted signal from an AM radio station is ________ . |
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Term
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Definition
| USCG considers the frequency band of HF to range from _____ to ______ since it monitors the radio frequency of __________ which is the international HF frequency for distress and hailing. |
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Term
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Definition
| The electromagnetic spectrum is commonly referred to as the ________ __________. |
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Term
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Definition
| Biggest two barriers of radio frequency communication. |
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Term
Verbal
Nonverbal
Print
Electronic |
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Definition
| Communication is the process of exchanging information. This exchange can take many forms including: |
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Term
One way Transmissions
Simplex system
Two way transmission
half duplex
full duplex |
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Definition
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Term
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Definition
| Positive powers of ten up to the power of 18. |
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Term
Mic, Audio Amp, Driver/Filter, Tuner
Phase Lock Loop, Carrier Oscillator, Modulator, Buffer, Power Amp, Coupler,
Antenna |
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Definition
| Name the parts of the transmitter. |
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Term
| Antenna, RF Amp/ Filter, Tuner, Phase Lock Loop, Local Oscillator, Mixer, IF (Intermediate Frequency) Filter/Amp, Detector, Audio Amp, Speaker |
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Definition
| Name the parts of a receiver. |
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Term
Reception
Selection
Detection
Reproduction |
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Definition
| Name the receiver has four function in order for the signal to be heard. |
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Term
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Definition
| What is the difference frequency usually used to utilized as the intermediate frequency? |
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Term
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Definition
| What changes the human voice into an electrical current? |
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Term
Audio Amp
Driver Amp/Filter |
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Definition
| What circuits in a transmitter amplifies the signal from the microphone and provides an additional amplification and filtering process for the signal? |
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Term
Tuner / Phase Lock Loop
Carrier Oscillator |
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Definition
| what circuits determines, develops, and ensures accuracy of the base frequency? |
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Term
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Definition
| What combines the oscillator frequency and original audio signal? |
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Term
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Definition
| What amplifies the RF signal and isolates the carrier circuit from affecting RF signal? |
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Term
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Definition
| What increases the power of the signal to the required level needed to transmit? |
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Term
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Definition
| what provides the means to adjust the "size" of an antenna electrically by changing the inductance or capacitance of the circuit. |
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Term
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Definition
| The ________ matches the transmitter and transmission line impedance to the impedance of free space. |
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Term
RF Amp
Filter (aka selection process) |
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Definition
| What is the first circuit in a receiver after the antenna? |
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Term
Tuner
Phase Lock Loop
Local Oscillator |
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Definition
| what does the LO circuit consist of? |
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Term
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Definition
| What mixes the input RF signal and the local oscillator frequency and generates the IF or intermediate frequency. |
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Term
Intermediate frequency filter
amp |
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Definition
| After the intermediate frequency is generated, it travels through an __________ and _________. |
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Term
It extracts the intelligence from the IF peaving the orignal audio.
detector:
AM receivers called AM detector
FM receivers called discriminator |
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Definition
| What does the detector do in a receiver circuit? |
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Term
| AF passes through an audio amp in order to be loud enough to be heard through the speakers. The speakers then convert the audio signal into sound waves the ear can hear. |
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Definition
| Purpose of an Audio amp and speaker? |
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