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What is the primary function of an external earth connection or ground rod?
What is the maximum power permitted on the 2200 meter band?
Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?
What notifications must be given before transmitting on the 630 meter or 2200 meter bands?
What must be posted at the station location of a station being operated by telecommand on or within 50 km of the earth's surface?
What must the administering VEs do after the administration of a successful examination for an amateur operator license?
Amateur stations may not transmit in which of the following frequency segments if they are located in the contiguous 48 states and north of Line A?
Why should effective radiated power to a satellite that uses a linear transponder be limited?
Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?
Which of the following best describes the term self-spotting? in connection with HF contest operating?
Which of the following digital modes is especially useful for EME communications?
How do ALE stations establish contact?
What do Hepburn maps predict?
What is the best time of day for transequatorial propagation?
What is indicated by a rising A or K index?
Which of the following parameters does a spectrum analyzer display on the vertical and horizontal axes?
Which of the following methods measures intermodulation distortion in an SSB transmitter?
What does a receiver noise floor of -174 dBm represent?
What is meant by the blocking dynamic range of a receiver?
What undesirable effect can occur when using an IF noise blanker?
What is the magnitude of the current at the input of a parallel RLC circuit at resonance?
What is the relationship between the AC current through an inductor and the voltage across an inductor?
Which point in Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and an 18-microhenry inductor at 3.505 MHz?
How many watts are consumed in a circuit having a power factor of 0.2 if the input is 100 VAC at 4 amperes?
Why do many MOSFET devices have internally connected Zener diodes on the gates?
What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?
Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?
Which materials are commonly used as a core in an inductor?
What is a characteristic of DIP packaging used for integrated circuits?
What is a solid-state relay?
What logical operation is performed by an exclusive NOR gate?
What is a characteristic of a grounded-grid amplifier?
How does an impedance-matching circuit transform a complex impedance to a resistive impedance?
What is the purpose of a step-start circuit in a high-voltage power supply?
Which of the following can be used to generate FM phone emissions?
How frequently must an analog signal be sampled by an analog-to-digital converter so that the signal can be accurately reproduced?
What is ringing in a filter?
How can an oscillator's microphonic responses be reduced?
Why would a direct or flash conversion analog-to-digital converter be useful for a software defined radio?
What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency when the modulating frequency is 1000 Hz?
What factors affect the bandwidth of a transmitted CW signal?
How does the spread spectrum technique of frequency hopping work?
What is included in the total resistance of an antenna system?
What is the far field of an antenna?
What is the approximate feed point impedance at the center of a two-wire folded dipole antenna?
What is an advantage of using top loading in a shortened HF vertical antenna?
How must an antenna's driven element be tuned to use a hairpin matching system?
What impedance does a 1/8-wavelength transmission line present to a generator when the line is shorted at the far end?
Which of the following is often determined using a Smith chart?
Which is generally true for low band (160 meter and 80 meter) receiving antennas?