Exam Primer

Overview
1. Regulations and Policies
  • Authority and Regulations
  • Licence
  • License Penalties
  • Certificate
  • Operation, Repair
  • Content Restrictions
  • Operating Restrictions
  • Interference
  • Emergencies
  • Non-remuneration, Privacy
  • Call Signs
  • Other Countries
  • Frequency Bands
  • Power Allowed
  • unmodulated carriers, retransmission
  • amplitude modulation, frequency stability, me
  • International Telecommunication Union (ITU)
  • Exams
  • Antenna Structures
  • RF Field Strength
  • Resolving Complaints
    • 2. Operating and Procedures
  • VHF/UHF Repeaters - Voice
  • Phonetic Alphabet
  • Voice Operating Procedures
  • tuning, testing and dummy loads
  • Morse Code (CW) procedures
  • RST signal reporting, S meter
  • Q Signals
  • Emergency Operating Procedures
  • Record Keeping, Antenna Orientation and Maps
    • 3. Station Assembly, Practice and Safety
  • Layout of HF Stations
  • Layout of FM Transmitters
  • Layout of FM Receivers
  • Layout of CW Transmitters
  • Layout of SSB/CW receivers
  • Layout of SSB Transmitters
  • Layout of Digital Systems
  • Layout of Regulated Power Supplies
  • Layout of Yagi-Uda Antennas
  • Receiver Fundamentals
  • Transmitter, carrier, keying, AM
  • Carrier Suppression, SSB
  • Frequency and Phase Modulation
  • Station Accessories
  • Digital Modes
  • Batteries
  • Power Supplies
  • Electrical Safety
  • Antenna and Tower Safety
  • RF Exposure Safety
    • 4. Circuit Components
  • Amplifier Fundamentals
  • Diodes
  • Bipolar Transistors
  • Field-effect Transistors
  • Tiode Vacuum Tubes
  • Resister Color Codes
    • 5. Basic Electronics and Theory
  • Metric Prefixes
  • Basic Concepts
  • Circuits
  • Ohm's law
  • Series and Parallel Resistors
  • Power law, Resister Power Disipation
  • AC and frequency
  • Ratios, Logarithms and Decibels
  • Inductance and Capacitance
  • Reactance and Impedance
  • Magnetica and Transformers
  • Resonance and Tuned Circuits
  • Meters and Measurements
    • 6. Feedlines and Antenna Systems
  • Impedance and Feedlines
  • Balanced and Unbalanced feedlines
  • Feedlines and Connectors
  • Line Losses
  • Standing Wave Ratio
  • Impedance Matching
  • Isotropic Sources, Polarization
  • Wavelength vs Physical Length
  • Antenna Radiation Patterns
  • Vertical Antennas
  • Yagi Antennas
  • Wire Antennas
  • Quad/loop Antennas
    • 7. Radio Wave Propagation
  • Propogation Types
  • Ionospheric Regions
  • Hops and Skips
  • Ionosphere Issues
  • Solar Activity
  • MF and HF and Skywaves
  • VHF and UHF, Sporadic-E, Aurira, Ducting
  • Scatter - HF, VHF, UHF
    • 8. Interference and Suppression
  • Front-end overload
  • Audio Rectification, Bypass Capacitors, Ferri
  • Intermodulation, Spurious, Key-clicks
  • Harmonics, Splatter, Transmitter Adjustments
  • Filters

    • 3.11 Transmitter, carrier, keying, AM

    Practice


    B-003-11-01
    What does chirp mean?
    A high-pitched tone which is received along with a CW signal
    A small change in a transmitter's frequency each time it is keyed
    A slow change in transmitter frequency as the circuit warms up
    An overload in a receiver's audio circuit whenever CW is received

    B-003-11-02
    What can be done to keep a CW transmitter from chirping?
    Add a key-click filter
    Keep the power supply voltages very steady
    Keep the power supply current very steady
    missing

    B-003-11-03
    What circuit has a variable-frequency oscillator connected to a driver and a power amplifier?
    A crystal-controlled transmitter
    A VFO-controlled transmitter
    A single-sideband transmitter
    A packet-radio transmitter

    B-003-11-04
    What type of modulation system changes the amplitude of an RF wave for the purpose of conveying information?
    Phase modulation
    Amplitude modulation
    Amplitude-rectification modulation
    Frequency modulation

    B-003-11-05
    In what emission type does the instantaneous amplitude (envelope) of the RF signal vary in accordance with the modulating audio?
    Frequency modulation
    Pulse modulation
    Amplitude modulation
    Frequency shift keying

    B-003-11-06
    Morse code is usually transmitted by radio as:
    a series of key-clicks
    a continuous carrier
    an interrupted carrier
    a voice-modulated carrier

    B-003-11-07
    A mismatched antenna or feedline may present an incorrect load to the transmitter. The result may be:
    loss of modulation in the transmitted signal
    the driver stage will not deliver power to the final
    excessive heat produced in the final transmitter stage
    the output tank circuit breaks down

    B-003-11-08
    One result of a slight mismatch between the power amplifier of a transmitter and the antenna would be:
    smaller DC current drain
    lower modulation percentage
    reduced antenna radiation
    radiated key-clicks

    B-003-11-09
    An RF oscillator should be electrically and mechanically stable. This is to ensure that the oscillator does not:
    become over modulated
    generate key-clicks
    drift in frequency
    cause undue distortion

    B-003-11-10
    The input power to the final stage of your transmitter is 200 watts and the output is 125 watts. What has happened to the remaining power?
    It has been dissipated as heat loss
    It has been used to provide greater efficiency
    It has been used to provide negative feedback
    It has been used to provide positive feedback

    B-003-11-11
    The difference between DC input power and RF output power of a transmitter RF amplifier:
    is lost in the feed line
    appears as heat dissipation
    is due to oscillating
    radiates from the antenna