What is the highest legal carrier frequency on the 20-meter band for transmitting a 2.8 kHz wide USB data signal?

1. A14.0708 MHz
2. B14.1002 MHz
3. C14.1472 MHz
4. D14.3490 MHz

Which amateur stations may be operated under RACES rules?

1. AOnly those club stations licensed to Amateur Extra class operators
2. BAny FCC-licensed amateur station except a Technician class
3. CAny FCC-licensed amateur station certified by the responsible civil defense organization for the area served
4. DOnly stations meeting the FCC Part 97 technical standards for operation during an emergency

Which of the following operating arrangements allows an FCC-licensed US citizen to operate in many European countries, and amateurs from many European countries to operate in the US?

1. ACEPT
2. BIARP
3. CITU reciprocal license
4. DAll these choices are correct

Which of the following may transmit encrypted messages?

1. ATelecommand signals to terrestrial repeaters
2. BTelecommand signals from a space telecommand station
3. CAuxiliary relay links carrying repeater audio
4. DMesh network backbone nodes

What is a Volunteer Examiner Coordinator?

1. AA person who has volunteered to administer amateur operator license examinations
2. BAn organization paid by the volunteer examiner team to publicize and schedule examinations
3. CAn organization that has entered into an agreement with the FCC to coordinate, prepare, and administer amateur operator license examinations
4. DThe person who has entered into an agreement with the FCC to be the VE session manager

Which of the following geographic descriptions approximately describes "Line A"?

1. AA line roughly parallel to and south of the border between the US and Canada
2. BA line roughly parallel to and west of the US Atlantic coastline
3. CA line roughly parallel to and north of the border between the US and Mexico
4. DA line roughly parallel to and east of the US Pacific coastline

Which of the following is characteristic of an inverting linear transponder?

1. ADoppler shift is reduced because the uplink and downlink shifts are in opposite directions
2. BSignal position in the band is reversed
3. CUpper sideband on the uplink becomes lower sideband on the downlink, and vice versa
4. DAll these choices are correct

In digital television, what does a coding rate of 3/4 mean?

1. A25% of the data sent is forward error correction data
2. BData compression reduces data rate by 3/4
3. C1/4 of the time interval is used as a guard interval
4. DThree, four-bit words are used to transmit each pixel

Why do DX stations often transmit and receive on different frequencies?

1. ABecause the DX station may be transmitting on a frequency that is prohibited to some responding stations
2. BTo separate the calling stations from the DX station
3. CTo improve operating efficiency by reducing interference
4. DAll these choices are correct

What type of packet frame is used to transmit APRS beacon data?

1. AAcknowledgement
2. BBurst
3. CUnnumbered Information
4. DConnect

How does Q65 differ from JT65?

1. AKeyboard-to keyboard operation is supported
2. BQuadrature modulation is used
3. CMultiple receive cycles are averaged
4. DAll these choices are correct

How are the component fields of an electromagnetic wave oriented?

1. AThey are parallel
2. BThey are tangential
3. CThey are at right angles
4. DThey are 90 degrees out of phase

At what time of day is transequatorial propagation most likely to occur?

1. AMorning
2. BNoon
3. CAfternoon or early evening
4. DLate at night

What is the cause of short-term radio blackouts?

1. ACoronal mass ejections
2. BSunspots on the solar equator
3. CNorth-oriented interplanetary magnetic field
4. DSolar flares

Which of the following test instruments is used to display spurious signals and/or intermodulation distortion products generated by an SSB transmitter?

1. ADifferential resolver
2. BSpectrum analyzer
3. CLogic analyzer
4. DNetwork analyzer

What three test loads are used to calibrate an RF vector network analyzer?

1. A50 ohms, 75 ohms, and 90 ohms
2. BShort circuit, open circuit, and 50 ohms
3. CShort circuit, open circuit, and resonant circuit
4. D50 ohms through 1/8 wavelength, 1/4 wavelength, and 1/2 wavelength of coaxial cable

What is the noise figure of a receiver?

1. AThe ratio of atmospheric noise to phase noise
2. BThe ratio of the noise bandwidth in hertz to the theoretical bandwidth of a resistive network
3. CThe ratio in dB of the noise generated in the receiver to atmospheric noise
4. DThe ratio in dB of the noise generated by the receiver to the theoretical minimum noise

What is meant by the blocking dynamic range of a receiver?

1. AThe difference in dB between the noise floor and the level of an incoming signal that will cause 1 dB of gain compression
2. BThe minimum difference in dB between the levels of two FM signals that will cause one signal to block the other
3. CThe difference in dB between the noise floor and the third-order intercept point
4. DThe minimum difference in dB between two signals which produce third-order intermodulation products greater than the noise floor

What undesirable effect can occur when using a noise blanker?

1. AReceived audio in the speech range might have an echo effect
2. BThe audio frequency bandwidth of the received signal might be compressed
3. CStrong signals may be distorted and appear to cause spurious emissions
4. DFM signals can no longer be demodulated

What is the magnitude of the impedance of a parallel RLC circuit at resonance?

1. AApproximately equal to circuit resistance
2. BApproximately equal to inductive reactance
3. CLow compared to the circuit resistance
4. DHigh compared to the circuit resistance

What letter is commonly used to represent susceptance?

1. AG
2. BX
3. CY
4. DB

Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?

1. APoint 1
2. BPoint 3
3. CPoint 7
4. DPoint 8

What combines to create the self-resonance of a component?

1. AThe component's resistance and reactance
2. BThe component's nominal and parasitic reactance
3. CThe component's inductance and capacitance
4. DThe component's electrical length and impedance

How does DC input impedance at the gate of a field-effect transistor (FET) compare with that of a bipolar transistor?

1. AThey are both low impedance
2. BAn FET has lower input impedance
3. CAn FET has higher input impedance
4. DThey are both high impedance

What is the most useful characteristic of a Zener diode?

1. AA constant current drop under conditions of varying voltage
2. BA constant voltage drop under conditions of varying current
3. CA negative resistance region
4. DAn internal capacitance that varies with the applied voltage

In Figure E6-3, which is the schematic symbol for a NAND gate?

1. A1
2. B2
3. C3
4. D4

What core material property determines the inductance of an inductor?

1. APermittivity
2. BResistance
3. CReactivity
4. DPermeability

What is a characteristic of DIP packaging used for integrated circuits?

1. AExtremely low stray capacitance (dielectrically isolated package)
2. BExtremely high resistance between pins (doubly insulated package)
3. CTwo chips in each package (dual in package)
4. DTwo rows of connecting pins on opposite sides of package (dual in-line package)

What is the approximate open-circuit voltage produced by a fully illuminated silicon photovoltaic cell?

1. A0.5 volts
2. B0.7 volts
3. C1.1 volts
4. D1.5 volts

Which of the following can divide the frequency of a pulse train by 2?

1. AAn XOR gate
2. BA flip-flop
3. CAn OR gate
4. DA multiplexer

What type of amplifier circuit is shown in Figure E7-1?

1. ACommon base
2. BCommon collector
3. CCommon emitter
4. DEmitter follower

What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network?

1. AGreater harmonic suppression
2. BHigher efficiency
3. CTo eliminate one capacitor
4. DGreater transformation range

How is battery operating time calculated?

1. AAverage current divided by capacity in amp-hours
2. BAverage current divided by internal resistance
3. CCapacity in amp-hours divided by average current
4. DInternal resistance divided by average current

What occurs when the input signal levels to a mixer are too high?

1. ASpurious mixer products are generated
2. BMixer blanking occurs
3. CAutomatic limiting occurs
4. DExcessive AGC voltage levels are generated

Which of the following is generally true of Finite Impulse Response (FIR) filters?

1. AFIR filters can delay all frequency components of the signal by the same amount
2. BFIR filters are easier to implement for a given set of passband rolloff requirements
3. CFIR filters can respond faster to impulses
4. DAll these choices are correct

What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 1,800 ohms and RF is 68 kilohms?

1. A1
2. B0.03
3. C38
4. D76

Which of these functions can be performed by a phase-locked loop?

1. AWide-band AF and RF power amplification
2. BFrequency synthesis and FM demodulation
3. CPhotovoltaic conversion and optical coupling
4. DComparison of two digital input signals and digital pulse counting

Why are direct or flash conversion analog-to-digital converters used for a software defined radio?

1. AVery low power consumption decreases frequency drift
2. BImmunity to out-of-sequence coding reduces spurious responses
3. CVery high speed allows digitizing high frequencies
4. DAll these choices are correct

What is the modulation index of an FM phone signal having a maximum carrier deviation of plus or minus 6 kHz if the highest modulating frequency is 2 kHz?

1. A0.3
2. B3
3. C0.6
4. D6

What type of addresses do nodes have in a mesh network?

1. AEmail
2. BTrust server
3. CInternet Protocol (IP)
4. DTalk group

What are some of the differences between the Baudot digital code and ASCII?

1. ABaudot uses 4 data bits per character, ASCII uses 7 or 8; Baudot uses 1 character as a letters/figures shift code, ASCII has no letters/figures code
2. BBaudot uses 5 data bits per character, ASCII uses 7 or 8; Baudot uses 2 characters as letters/figures shift codes, ASCII has no letters/figures shift code
3. CBaudot uses 6 data bits per character, ASCII uses 7 or 8; Baudot has no letters/figures shift code, ASCII uses 2 letters/figures shift codes
4. DBaudot uses 7 data bits per character, ASCII uses 8; Baudot has no letters/figures shift code, ASCII uses 2 letters/figures shift codes

How much gain does an antenna have compared to a half-wavelength dipole if it has 6 dB gain over an isotropic radiator?

1. A3.85 dB
2. B6.0 dB
3. C8.15 dB
4. D2.79 dB

What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?

1. AGround conductivity will not be accurately modeled
2. BThe resulting design will favor radiation of harmonic energy
3. CThe computed feed point impedance may be incorrect
4. DThe antenna will become mechanically unstable

Which of the following describes a G5RV antenna?

1. AA wire antenna center-fed through a specific length of open-wire line connected to a balun and coaxial feed line
2. BA multi-band trap antenna
3. CA phased array antenna consisting of multiple loops
4. DA wide band dipole using shorted coaxial cable for the radiating elements and fed with a 4:1 balun

What is the purpose of making a Yagi's parasitic elements either longer or shorter than resonance?

1. AWind torque cancellation
2. BMechanical balance
3. CControl of phase shift
4. DMinimize losses

What is a use for a Wilkinson divider?

1. ATo divide the operating frequency of a transmitter signal so it can be used on a lower frequency band
2. BTo feed high-impedance antennas from a low-impedance source
3. CTo divide power equally between two 50-ohm loads while maintaining 50-ohm input impedance
4. DTo divide the frequency of the input to a counter to increase its frequency range

What is the velocity factor of a transmission line?

1. AThe ratio of its characteristic impedance to its termination impedance
2. BThe ratio of its termination impedance to its characteristic impedance
3. CThe velocity of a wave in the transmission line multiplied by the velocity of light in a vacuum
4. DThe velocity of a wave in the transmission line divided by the velocity of light in a vacuum

What are the two families of circles and arcs that make up a Smith chart?

1. AInductance and capacitance
2. BReactance and voltage
3. CResistance and reactance
4. DVoltage and impedance

What indicates the correct value of terminating resistance for a Beverage antenna?

1. AMaximum feed point DC resistance at the center of the desired frequency range
2. BMinimum low-angle front-to-back ratio at the design frequency
3. CMaximum DC current in the terminating resistor
4. DMinimum variation in SWR over the desired frequency range

What is meant by "100% tie-off" regarding tower safety?

1. AAll loose ropes and guys secured to a fixed structure
2. BAt least one lanyard attached to the tower at all times
3. CAll tools secured to the climber's harness
4. DAll circuit breakers feeding power to the tower must be tied closed with tape, cable, or ties