Maricopa Community Colleges  AVT210   19936-19965 
Official Course Description: MCCCD Approval: 03/26/96
AVT210 19936-19965 L+L 5 Credit(s) 6 Period(s)
Communications: Basic
Theory of operation and circuitry of amplitude modulation transmitter and reception, frequency modulation transmission and reception, and antennas. Prerequisites: AVT110 and AVT115.
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MCCCD Official Course Competencies:
 
AVT210   19936-19965 Communications: Basic
1. Explain the basic operation of the amplitude modulation transmitter. (I)
2. Explain the basic operation of modulator circuits. (II)
3. Explain the basic circuitry and operation of the frequency modulation transmitter. (III)
4. Explain the basic circuitry and operation of the frequency modulation receiver. (V)
5. Explain the basic circuitry and operation of the signal sideband transmitter. (VI)
6. Explain the basic circuitry and operation of the signal sideband receiver. (VII)
7. Explain the fundamentals of propagation. (VIII)
8. Explain the design and operation of vertical antennas. (IX)
9. Explain the design and operation of half-wave dipole antennas. (X)
10. Explain the fundamentals of mast installation. (XI)
11. Explain the design of transmission lines. (XII)
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MCCCD Official Course Outline:
 
AVT210   19936-19965 Communications: Basic
    I. Amplitude Modulation (AM) Transmitter
        A. Theory of operation
          1. Basic transmitter components
            a. Oscillator
            b. Buffer
            c. Power amplifier
          2. Keying circuits
          3. Pi network output
          4. Transmitter tuning
          5. Spurious transmissions
            a. Parasitic oscillation
            b. Overmodulation
          6. Dummy load
          7. Radio frequency
          8. Radio frequency power meter
      II. Modulator Circuits
          A. Theory of operation
            1. Modulator power amplifier
            2. Speech amplifiers
            3. Speech compression
            4. High-level amplifiers
            5. Low-level modulation
            6. Sideband generation
            7. Bandwidth
            8. Modulation percentage measurements
        III. Frequency Modulation (FM) Transmission
            A. Theory of operation
              1. Oscillator
              2. Modulator
                a. Carrier
                b. Sidebands
                c. Bandwidth
              3. Frequency multipliers
              4. Linear power amplifiers
              5. Oscillator auto flight computer systems
              6. Pre-emphasis circuits
          IV. AM Receivers
              A. Theory of operation
                1. Tuned radio frequency
                  a. Radio frequency (RF) amplifiers
                  b. Detectors
                  c. Ganged tuning
                2. Superheterodyne receivers
                  a. RF amplifier
                  b. Mixer
                  c. Oscillator
                  d. Intermediate frequency amplifier
                  e. Detector
                  f. AF amplifier
                3. Image rejection
                4. Double and triple superheat
                5. Beat frequency oscillator (BFO)
            V. FM Receivers
                A. Theory of operation
                  1. FM detectors
                    a. Slope detector
                    b. Ratio detector
                    c. Foster Seeley discriminator
                  2. Limiters
                  3. De-emphasis circuits
                  4. Squelch circuits
              VI. Signal Sideband (SSB) Transmitter
                  A. Theory of operation
                    1. Balanced modulator
                    2. Double sideband signal
                    3. Sideband filter
                    4. Mixers
                    5. Linear RF power amplifier
                VII. SSB Receivers
                    A. Theory of operation
                      1. BFO circuits
                      2. Product detectors
                      3. Automatic gain control circuits
                  VIII. Propagation
                      A. Theory of operation
                        1. Radio wave
                        2. Ground wave
                        3. Sky wave
                        4. Ionosphere
                        5. Polarization
                        6. Antennas
                          a. Marconi
                          b. Hertz
                    IX. Antennas
                        A. Theory of operation
                        B. Vertical Antennas
                          1. Height
                          2. Electrical and magnetic distribution
                          3. Polarization pattern
                          4. Feed impedance
                        C. Horizontal antennas
                          1. Length
                          2. Voltage current distribution
                          3. Polarization pattern
                      X. Half-Wave Dipole
                          A. Theory of operation
                            1. Length
                            2. E and I distribution
                            3. Polarization pattern
                            4. Feed impedance
                        XI. Mast Installtion
                            A. Theory of operation
                              1. Foundation
                              2. Guy wires
                              3. Types of antennas
                                a. Distance measuring equipment
                                b. Automatic direction finder
                                c. Very high frequency omnirange
                                d. Communication and very high frequency
                                e. Communication and high frequency
                                f. Radio altimeter
                                g. Radar
                                h. Traffic and collision avoidance systems
                                i. Air traffic controller
                                j. Marker beacon
                                k. Glidestop
                                l. Localizer
                          XII. Transmission Lines
                              A. Theory of operation
                                1. Single wire
                                2. Twisted pair
                                  a. Characteristic impedance
                                3. Ribbon line
                                  a. Construction
                                  b. Impedance
                                  c. Losses
                                4. Open wire line
                                5. Coaxial cable
                                  a. Construction
                                  b. Impedances
                                  c. Losses
                                6. Shortwave ratio measurements
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