Exam Primer

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
  • 8.1 Front-end overload


    What is meant by receiver overload?
    Interference caused by turning the volume up too high
    Too much current from the power supply
    Interference caused by strong signals from a nearby transmitter
    Too much voltage from the power supply

    What is one way to tell if radio frequency interference to a receiver is caused by front-end overload?
    If grounding the receiver makes the problem worse
    If connecting a low pass filter to the receiver greatly cuts down the interference
    If the interference is about the same no matter what frequency is used for the transmitter
    If connecting a low pass filter to the transmitter greatly cuts down the interference

    If a neighbour reports television interference whenever you transmit, no matter what band you use, what is probably the cause of the interference?
    Incorrect antenna length
    Receiver VR tube discharge
    Receiver overload
    Too little transmitter harmonic suppression

    What type of filter should be connected to a TV receiver as the first step in trying to prevent RF overload from an amateur HF station transmission?
    No filter

    When the signal from a transmitter overloads the audio stages of a broadcast receiver, the transmitted signal:
    is distorted on voice peaks
    can appear wherever the receiver is tuned
    appears only on one frequency
    appears only when a station is tuned

    Cross-modulation of a broadcast receiver by a nearby transmitter would be noticed in the receiver as:
    interference only when a broadcast signal is tuned
    the undesired signal in the background of the desired signal
    distortion on transmitted voice peaks
    interference continuously across the dial

    What is cross-modulation interference?
    Interference between two transmitters of different modulation type
    Interference caused by audio rectification in the receiver reamplifier
    Harmonic distortion of the transmitted signal
    Modulation from an unwanted signal is heard in addition to the desired signal

    What is the term used to refer to the condition where the signals from a very strong station are superimposed on other signals being received?
    Receiver quieting
    Cross-modulation interference
    Capture effect
    Intermodulation distortion

    What is the result of cross-modulation?
    Receiver quieting
    A decrease in modulation level of transmitted signals
    Inverted sidebands in the final stage of the amplifier
    The modulation of an unwanted signal is heard on the desired signal

    If a television receiver suffers from cross-modulation when a nearby amateur transmitter is operating at 14 MHz, which of the following cures might be effective?
    A low pass filter attached to the antenna output of the transmitter
    A high pass filter attached to the antenna output of the transmitter
    A high pass filter attached to the antenna input of the television
    A low pass filter attached to the antenna input of the television

    How can cross-modulation be reduced?
    By installing a suitable filter at the receiver
    By using a better antenna
    By increasing the receiver RF gain while decreasing the AF gain
    By adjusting the passband tuning