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47 Cards in this Set
- Front
- Back
DEFINE ELF
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EXTREAMELY LOW FREQUENCY
UP TO 300HZ SUBMARINES |
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DEFINE SLF
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SUPER LOW FREQUENCY 300HZ - 3KHZ
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DEFINE ULF
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ULTRA LOW FREQUENCY
300HZ- 3KHZ |
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DEFINE VLF
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VERY LOW FREQUENCY
3KHZ-30KHZ FLEET COMMS |
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DEFINE LF
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LOW FREQUENCY
30KHZ-300KHZ RTTY BROADCAST |
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DEFINE MF
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MEDIUM FREQUENCY
300KHZ-3MHZ INTERNATIONAL DISTRESS, SEACH AND RESCUE |
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DEFINE HF
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HIGH FREQUENCY
3MHZ-30MHZ LONG DISTANCE COMMS |
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DEFINE VHF
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VERY HIGH FREQUENCY
30MHZ-300MHZ LINE OF SIGHT COMMS |
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DEFINE UHF
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ULTRA HIGH FREQUENCY
300MHZ-3GHZ |
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DEFINE SHF
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SUPER HIGH FREQUENCY
3GHZ- 30GHZ RADAR AND SATELLITE COMMS |
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DEFINE EHF
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EXTERMELY HIGH FREQUENCY
30GHZ-300GHZ RADAR AND SATELLITE COMMS |
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DEFINE FREQUENCY
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THE NUMBER OF CYCLES PER UNIT OF TIME
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DEFINE WAVELENGTH
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DISTANCE IN SPACE OCCUPIED BY ONE CYCLE OF A RADIO WAVE
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DEFINE DUCTING
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TRAPPING OF AN RF WAVE BETWEEN TWO LAYERS OF THE EARTHS ATMOSHERE
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DEFINE REFRACTION
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THE BENDING OF AN RF WAVES AS THE WAVES PASS THOUGH MEDIUMS OF DIFFERENT DENSITY
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DEFINE MULTIPLEXING
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A METHOD FOR TRANSMITTING OF TWO OR MORE SIGNALS OVER A COMMON CARRIER WAVE
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DEFINE MODULATION/DEMODULATION
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MODULATION IS THE ABILITY TO IMPRESS INTELLIGENCE UPON A TRANSMISSION MEDIUM, SUCH A RADIO WAVES. DEMODULATION IS REMOVING THE INTELLIGENCE FROM THE MEDIUM.
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DEFINE BANDWIDTH
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THE DIFFERENCE BETWEEN THE HIGHEST USABLE FREQ OF A DEVICE AND THE LOWEST USEABLE FREQ OF A DEVICE.
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DEFINE KEYING
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KEYING THE TRANSMITTER CAUSES AND RF SIGNAL TO BE RADIATED
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WHAT ARE THE EARTHS ATMOSPHERES LAYERS
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TROPOSPHERE 3.7 MILES
STRATOSPHERE 3.7 -31.1 MILES IONOSPHERE 31.1 - 250 MILES |
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DEFINE CRITICAL FREQUENCY
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MAX FREQUENCY A RADIO WAVE BE TRANSMITTED VERTICALLY AND REFRACTED BACK DOWN TO EARTH
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DEFINE RADIO WAVES
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AN ENERGY WAVE GENERATED BY A TRANSMITTER
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DEFINE PROPAGATION
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THE WAY IN WHICH WAVES TRAVEL THOUGH THE ATMOSPHERE
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DEFINE AZIMUTH ANGLE
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THE ANGLE MEASURED CLOCKWISE FROM TRUE NORTH IN THE HORIZONTAL PLANE
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DEFINE ELEVATION ANGLE
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THE ANGLE BETWEEN THE HORIZONTAL PLANE AND THE LINE OF SIGHT
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DEFINE USB
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UPPER SIDE BAND
ALL THE FREQUENCIES ABOVE THE CARRIER |
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DEFINE LSB
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LOWER SIDE BAND
ALL THE FREQUENCIES BELOW THE CARRIER |
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DEFINE CW
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CONTINUIOUS WAVE
MODULATION CONSISTS OF ON-OFF KEYING OF A CARRIER WAVE. MORSE CODE |
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DEFINE AM
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AMPLITUDE MODULATION
ANY METHOD IF VARYING THE AMPLITUDE OF AN ELECTROMAGNETIC CARRIER FREQUENCY |
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DEFINE FM
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FREQUENCY MODULATION
THE MODULATING SIGNAL CAUSES THE CARRIER FREQUENCY TO VARY |
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DEFINE PRI
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PULSE REPETITION INTERVAL
THE TIME BETWEEN RADAR PULSES IS THE INTER-PULSE PERIOD |
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DEFINE PRF
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PLUS REPETITION FREQUENCY
THE RATE AT WHICH PULSES ARE TRANSMITTED |
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DEFINE RF AS IT APPLIES TO RADAR
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THE RADIO FEQUENCY ENERGY IS TRANSMITTED TO AND REFLECTS FROM THE REFLECTING OBJECT.
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DEFINE BW AS IT APPLIES TO RADAR
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THE OVERALL BANDWIDTH OF THE RECEIVER IS OFTEN DETERMINED BY THE BANDWIDTH OF THE IF STAGES.
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DEFINE CW AS IT APPLIES TO RADAR
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WHEN RADIO FREQUENCY ENERGY IS TRANSMITTED FROM A FIXED POINT CONTINUOUSLY STIKES AN OBJECT
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DEFINE PW AS IS APPLIES TO RADAR
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PULSE WIDTH
DURATION OF TIME BETWEEN THE BEGINING AND ENDING EDGES OF A PULSE |
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DEFINE SCAN AS IT APPLIES TO RADAR
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SYSTEMATIC MOVEMENT OF A RADAR BEAM TO COVER A DEFINITE PATTERN OR AREA IN SPACE
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DEFINE BEARING AS IT APPLIES TO RADAR
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ABILITY OF RADAR TO DISTINGUISH BETWEEN TARGETS THAT ARE CLOSE TOGETHER IN BEARING
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DEFINE AZIMUTH AS IS APPLIES TO RADAR
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ANGULAR MEASURMENT IN THE HORIZONAL PLANE IN A CLOCKWISE DIRECTION
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DEFINE AIR SEARCH RADAR
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DETERMINES THE POSITION, COURSE, AND SPEED OF AIR TARGETS IN A RELATIVELY LARGE AREA.
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DEFINE SURFACE SEARCH RADAR
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MAINTAINS A 360 DEGREE SEARCH PATTERN FOR ALL OBJECTS WITHIN LOS
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DEFINE FIRE CONTROL RADAR
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PROVIDES CONTINUOUS POSITIONAL DATA ON A TARGET
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DEFINE OPELINT
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OPERATIONAL ELECTRONIC INTELLIGENCE
IS CONCERNED WITH OPERATIONALLY RELEVANT INFORMATION OF FOREIGN NON COMM EMITTERS AND THEIR ASSOCIATED WEAPON SYSTEMS |
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DEFINE TECHLINT
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TECHNICAL ELECTRONIC INTELLIGENCE
CONCERNED WITH THE TECHNICAL ASPECTS OF FOREIGN NON COMM EMITTERS |
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DEFINE HALF DUPLEX
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PROVIDES COMMUNICATION IS BOTH DIRECTIONS BUT ONLY ONE WAY AT A TIME.
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DEFINE DUPLEX
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COMMUNICATION BETWEEN TWO STATIONS TAKES PLACE SIMULTANEOUSLY IN BOTH DIRECTIONS.
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DEFINE SIMPLEX
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COMMUNICATION IS ONE DIRECTION ONLY.
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