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What is one of the potential hazards of operating in the amateur radio microwave bands?
When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?
Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?
What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?
Which UHF amateur bands have frequencies authorized for space stations?
For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?
Which of the following geographic descriptions approximately describes "Line A"?
What is the purpose of digital store-and-forward functions on an amateur radio satellite?
How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?
What is the Cabrillo format?
Which of the following digital modes is especially useful for EME communications?
What is indicated when one of the ellipses in an FSK crossed-ellipse display suddenly disappears?
What is the cause of auroral activity?
What happens to linearly polarized radio waves that split into ordinary and extraordinary waves in the ionosphere?
What does the space weather term G5 mean?
Which of the following is good practice when using an oscilloscope probe?
Which of the following methods measures intermodulation distortion in an SSB transmitter?
Which of the following choices is a good reason for selecting a high frequency for the design of the IF in a superheterodyne HF or VHF communications receiver?
What is the term for spurious signals generated by the combination of two or more signals in a non-linear device or circuit?
Which of the following can cause shielded cables to radiate or receive interference?
What can cause the voltage across reactances in a series RLC circuit to be higher than the voltage applied to the entire circuit?
What letter is commonly used to represent susceptance?
Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 400-ohm resistor and a 38-picofarad capacitor at 14 MHz?
What is the power factor of an RL circuit having a 45-degree phase angle between the voltage and the current?
In Figure E6-1, what is the schematic symbol for a P-channel junction FET?
What characteristic of a PIN diode makes it useful as an RF switch?
What is a Programmable Logic Device (PLD)?
What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?
What is a characteristic of DIP packaging used for integrated circuits?
Which describes an optical shaft encoder?
Which circuit is bistable?
What is a Class D amplifier?
Which of the following filters would be the best choice for use in a 2 meter band repeater duplexer?
What is the primary reason that a high-frequency switching type high-voltage power supply can be both less expensive and lighter in weight than a conventional power supply?
What circuit is added to an FM transmitter to boost the higher audio frequencies?
What function is performed by a Fast Fourier Transform?
What is the gain-bandwidth of an operational amplifier?
What is a phase-locked loop circuit?
What is the purpose of a low-pass filter used in conjunction with a digital-to-analog converter?
What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?
How is Forward Error Correction implemented?
What is the most common method of reducing key clicks?
What is the effective radiated power relative to a dipole of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?
What is the front-to-back ratio of the radiation pattern shown in Figure E92?
How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus soil?
Which of the following would provide the best RF ground for your station?
Which of these feed line impedances would be suitable for constructing a quarter-wave Q-section for matching a 100-ohm loop to 50-ohm feed line?
What is the velocity factor of a transmission line?
What type of coordinate system is used in a Smith chart?
What feature of a cardioid pattern antenna makes it useful for direction finding?