Logging in (or registering) will help the system to select questions that you need to focus on.
Over what range of frequencies are the FCC human body RF exposure limits most restrictive?
What special operating frequency restrictions are imposed on slow scan TV transmissions?
What does PRB-1 require of regulations affecting amateur radio?
What notifications must be given before transmitting on the 630 meter or 2200 meter bands?
Which of the following amateur stations may transmit one-way communications?
What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?
Which of the following types of amateur station communications are prohibited?
What are Keplerian elements?
How is color information sent in analog SSTV?
Which of the following frequencies are sometimes used for amateur radio mesh networks?
What type of modulation is used for JT65 contacts?
Which of the following is a possible reason that attempts to initiate contact with a digital station on a clear frequency are unsuccessful?
Which of these emission modes is best for auroral propagation?
What is the approximate maximum range for signals using transequatorial propagation?
How does the maximum range of ground-wave propagation change when the signal frequency is increased?
How should an antenna analyzer be connected when measuring antenna resonance and feed point impedance?
What three test loads are used to calibrate an RF vector network analyzer?
Why can an attenuator be used to reduce receiver overload on the lower frequency HF bands with little or no impact on signal-to-noise ratio?
What does a third-order intercept level of 40 dBm mean with respect to receiver performance?
How can radio frequency interference from an AC motor be suppressed?
What is the resonant frequency of an RLC circuit if R is 33 ohms, L is 50 microhenries and C is 10 picofarads?
What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage or to discharge to 36.8% of its initial voltage?
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 consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?
What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?
What is the failure mechanism when a junction diode fails due to excessive current?
Which of the following is an advantage of BiCMOS logic?
Which materials are commonly used as a core in an inductor?
Why is gallium arsenide (GaAs) useful for semiconductor devices operating at UHF and higher frequencies?
Which describes an optical shaft encoder?
What is a truth table?
Where on the load line of a Class A common emitter amplifier would bias normally be set?
Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor?
Which of the following types of linear voltage regulator places a constant load on the unregulated voltage source?
Why is de-emphasis commonly used in FM communications receivers?
What is meant by direct digital conversion as applied to software defined radios?
What is an operational amplifier?
What is a microphonic?
What of the following instruments would be the most accurate for measuring the RMS voltage of a complex waveform?
What describes Orthogonal Frequency Division Multiplexing?
How is Forward Error Correction implemented?
What is the advantage of including parity bits in ASCII characters?
What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2.2 dB duplexer loss, and 7 dBd antenna gain?
What type of computer program technique is commonly used for modeling antennas?
What is the effect of adding a terminating resistor to a rhombic antenna?
How much does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?
What system matches a higher-impedance transmission line to a lower-impedance antenna by connecting the line to the driven element in two places spaced a fraction of a wavelength each side of element center?
What impedance does a 1/8-wavelength transmission line present to a generator when the line is open at the far end?
On the Smith chart shown in Figure E9-3, what is the only straight line shown?
Why is RF attenuation used when direction-finding?