Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/59

Click to flip

59 Cards in this Set

  • Front
  • Back
ANALOG
CONTINUOUS AND VARIABLE ELECTRICAL WAVES THAT REPRESENT AN INFINTE NUMBER OF VALUES.
PERIOD
THE TIME TO COMPLETE ONE WAVEFORM CYCLE.
WAVELENGTH
THE PHYSICAL EFFECTS OF ANY ELECTROMAGNETIC WAVE OCCURRING OVER A PERIOD OF TIME.
PHASE
THE POSITION OF A FEATURE, TYPICALLY A PEAK OR A TROUGH OF THE WAVEFORM.
RADIO FREQUENCY
ANY ELECTROMAGNETIC WAVE FREQUENCIES THAT LIE IN THE RANGE EXTENDING FROM BELOW 3 KILOHERTZ TO ABOUT 300 GIGAHERTZ.
HIGH FREQUENCY
2MHz TO 29.999MHz
VERY HIGH FREQUENCY
30MHz TO 151.975MHz
ULTRA HIGH FREQUENCY
225MHz TO 399.975MHz
SUPER HIGH FREQUENCY
3GHz TO 30GHz
EXTREMELY HIGH FREQUENCY
30GHz TO 300GHz
MICROWAVE FREQUENCY
UHF, SHF, AND EHF BANDS
AUDIO FREQUENCY
40Hz TO 15000Hz
CARRIER WAVE
AN INTERNALLY CREATED ELECTROMAGNETIC WAVE FORM THAT IS A CONSTANT FREQUENCY AND AMPLITUDE.
INTELLIGENCE WAVE
USUALLY A LOWER FREQUENCY SIGNAL THAT CONTAINS THE INTELLIGENCE COMPONENTS REQUIRED TO MODULATE A CARRIER WAVE.
HETERODYNING
THE PROCESS OF COMBINING TWO OR MORE INPUT SIGNALS IN A NON-LINEAR DEVICE.
NON-LINEAR DEVICE
ANY DEVICE WHERE THE RESULTIN CURRENT THROUGH THE DEVICE IS NOT PROPORTIONAL TO THE APPLIED VOLTAGE.
MODULATION
A PROCESS IN WHICH THE AMPLITUDE, FREQUENCY, OR THE PHASE OF A CARRIER WAVE IS VARIED IN ACCORDANCE WITH THE WAVEFORM OF INTELLIGENCE WAVE.( THE PROCESS OF MIXING ON THE TRANSMISSION END)
EFFECTIVE MODULATION
THE PHYSICAL MANIFESTATION THAT HAS THE SAME RESULT AS ELECTRONIC MODULATION.
FLYWHEEL EFFECT
THE INTERACTION OF A CAPACITOR AND AN INDUCTOR IN A SERIES CURCUIT.
AMPLITUDE MODULATION
THE MOST BASIC FORM OF MODULATION AND IS USUALLY THE STARTING POINT FOR COMMUNICATION SYSTEMS PRINCIPLES.
SIDE BANDS
THE RESULTS OF THE CONVENTIONAL MODULATION PROCESS.
UPPER SIDE BAND
THE SUM OF THE CARRIER PLUS INTELLIGENCE; ESSENTIALLY, IT IS THE INTELLIGENCE FREQUENCIES THAT ARE ADDED TO THE CARRIER FREQUENCY.
LOWER SIDE BAND
THE DIFFERENCE OF THE CARRIER AND INTELLIGENCE FREQUENCIES; ESSENTIALLY, IT IS THE INTELLIGENCE FREQUENCIES THAT ARE DEDUCTED FROM THE CARRIER FREQUENCY.
SINGLE SIDEBAND
THIS IS AMPLITUDE MODULATION APPLIED IN A WAY THAT PUTS ALL OF THE TRANSMIITER POWER INTO ONE SIDEBAND.
CENTER FREQUENCY
THE CARRIER FREQUENCY.
ANGLE MODULATION
THE ANGLE THAT THE SINE WAVE CARRIER IS VARIED FROM ITS REFERENCE VALUE: THIS FORM OF MODULATION HAS TWO SUB-CATERGORIES: FREQUENCY AND PHASE MODULATION.
FREQUENCY MODULATION
WHEN THE INSTANTANEOUS AMPLITUDE OF THE INTELLIGENCE SIGNAL DEVIATES THE INSTANTANEOUS FREQUENCY OF THE CARRIER AND WHEN THE INSTANTANEOUS FREQUENCY OF THE INTELLIGENCE VARIES THE RATE OF FREQUENCY DEVIATIONS.
PHASE MODULATION
WHEN THEINSTANTANEOUS AMPLITUDE AND FREQUENCY OF THE INTELLIGENCE SIGNAL DEVIATES THE PHASE OF THE CARRIER SIGNAL AND THE FREQUENCY OF THE INTELLIGENCE VARIES THE RATE OF DEVIATIONS.
DIGITAL
ANY METHOD OF STORING, PROCESSING AND TRANSMITTING INFORMATION THROUGH THE USE OF DISTINCT ELECTRONIC OR OPTICAL PULSES THAT REPRESENT 0AND 1.
BIT
THE SMALLEST POSSIBLE UNIT OF INFORMATION IN A DIGITAL CODE.
BYTE
GENERALLY, 8 BITS MAKE A BYTE.
OCTET
AN 8 BIT-SET
BAUD RATE
THE MAXIMUM NUMBER OF CHANGES THAT OCCUR PER SECOND IN THE ELECTRICAL STATE OF A COMMUNICATION CIRCUIT.
FREQUENCY SHIFT KEY
A FORM OF FM IN WHICH THE MODULATING WAVE SHIFTS THE OUTPUT BETWEEN TWO PREDETERMIND FREQUENCIES.
PHASE SHIFT KEY
THE PHASE OF THE CARRIER IS VARIED INSTEAD OF THE FREQUENCY IN DIRECT RELATION TO THE MODULATING SIGNALS AMPLITUDE.
QUADRATURE AMPLITUDE MODULATION
A COMBINATION OF AM AND PSK, IN THIS FORM OF MODULATION EACH CHANGE IN AMPLITUDE REPRESENTS A PIECE OF INFORMATION AND EACH SHIFT IN PHASE REPRESNTS A PIECE OF INFORMATION.
MULTIPLEXING
TECHNIQUES THAT ALLOW A NUMBER OF SIMULTANEOUS TRANSMISSIONS OVER A SINGLE CIRCUIT.
PULSE MODULATION
A METHOD OF MANIPULATING SHORT DURATION PULSES IN DIRECT RELATION TO MODULATING INTELLIGENCE.
PULSE AMPLITUDE MODULATION
CHANGING THE AMPLITUDE OF THE PULSES IN DIRECT RELATION TO MODULATING INTELLIGENCE.
PULSE DURATION MODULATION
CHANGING THE DURATION OF THE PULSES IN DIRECT RELATION TO MODULATING INTELLIGENCE.
PULSE POSITION MODULATION
CHANGING THE POSITION OF THE PULSES IN DIRECT RELATION TO MODULATING INTELLIGENCE.
PULSE CODE MODULATION
ENCODING THE PULSES IN DIRECT RELATION TO MODULATING INTELLIGENCE.
PULSE FORMING NETWORK
A HIGH VOLTAGE TRANSFORMER WITH WINDINGS THAT ACT AS A SCALABLE SHUNT CAPACITOR.
REST TIME
THE TIME AT ZERO BETWEEN THE PULSES
PULSE RECURRENCE TIME
THE PULSE TIME PLUS THE REST TIME
PULSE RECURRENCE FREQUENCY
IS EQUAL TO ONE DIVIDED BY THE PRT; f=1/t
TRANSIENT TIME
THE TIME FOR A SQUARE OR RECTANGULAR WAVEFORM TO GO FROM ZERO TO 100%
RISE TIME
THE TIME FOR THE VOLTAGE OR CURRENT TO RISE FROM 10% TO 90% FOR DIGITAL APPLICATIONS OR 0% TO 70% FOR ANALOG APPLICATIONS
FALL TIME
THE TIME FOR THE VOLTAGE OR CURRENT TO FALL FROM 90%(OR 70%) TO 10%
PULSE LENGTH
THE LENGTH OF A PULSE MEASURED FROM THE 70%(OR 90%) POINTS OF THE RISE AND FALL, MEASURED REFERENCED TO TIME
SPEED OF LIGHT
186,282 MILES PER SECOND
NAUTICAL MILE
6,076 FEET
RADAR MILE
IS EQUAL TO THE SPEED OF LIGHT(186,282 MILES PER SECOND)
ELECTROMAGNETIC WAVE
A WAVE OF ENERGY THAT HAS A FREQUENCY WITHIN THE ELECTROMAGNETIC SPECTRUM AND IS BROADCASTED AS PERIODIC DISTURBANCE OF THE ELECTROMAGNETIC FIELD WHEN AN ELECTRIC CHARGE OSCILLATES OR ACCELERATES.
ELECTROMAGNETIC RADIATION
RADIATION MADE UP OF OSCILLATING ELECTRIC AND MAGNETIC FIELDS AND BROADCASTED AT THE SPEED OF LIGHT(186,282 MILE PER SECOND)
ELECTROMAGNETIC INTRUSION
THE INTENTIONAL INSERTION OF ELECTROMAGNETIC ENERGY INTO TRANSMISSION PATHS IN ANY MANNER, WITH THE OBJECTIVE OF DECEIVING OPERATORS OR OF CAUSING CONFUSION. A.K.A ELECTRONIC WARFARE.
ELECTROMAGNETIC PULSE
THE ELECTROMAGNETIC RADIATION FROM A NUCLEAR EXPLOSION CAUSED BY COMPTON-RECOIL ELECTRONS AND PHOTOELECTRONS FROM PHOTONS SCATTERED IN THE MATERIALS OF THE NUCLEAR DEVICE OR IN A SURROUNDING MEDIUM. *A BROADBAND, HIGH INTENSITY, SHORT-DURATION BURST OF ELECTROMAGNETIC ENERGY.
ELECTROMAGNETIC SPECTRUM
THE ENTIRE RANGE OF ALL ELECTROMAGNETIC WAVES ARRANGED ACCORDING TO FREQUENCY AND WAVELENGTH.
EMI
ANY ELECTROMAGNETIC DISTURBANCE THAT INTERRUPTS, OBSTRUCTS,OR OTHERWISE DEGRADES OR LIMITS THE EFFECTIVE PERFORMANCE OF ELECTRONICS/ELECTRICAL EQUIPMENT