Why is it not legal to transmit a 3 kHz bandwidth USB signal with a carrier frequency of 14.348 MHz?

1. AUSB is not used on 20-meter phone
2. BThe lower 1 kHz of the signal is outside the 20-meter band
3. C14.348 MHz is outside the 20-meter band
4. DThe upper 1 kHz of the signal is outside the 20-meter band

What is the National Radio Quiet Zone?

1. AAn area surrounding the FCC monitoring station in Laurel, Maryland
2. BAn area in New Mexico surrounding the White Sands Test Area
3. CAn area surrounding the National Radio Astronomy Observatory
4. DAn area in Florida surrounding Cape Canaveral

Which of the following apply to communications transmitted to amateur stations in foreign countries?

1. AThird party traffic must be limited to that intended for the exclusive use of government and non-Government Organization (NGOs) involved in emergency relief activities
2. BAll transmissions must be in English
3. CCommunications must be limited to those incidental to the purpose of the amateur service and remarks of a personal nature
4. DAll these choices are correct

What is the definition of telemetry?

1. AOne-way transmission of measurements at a distance from the measuring instrument
2. BTwo-way transmissions in excess of 1000 feet
3. CTwo-way transmissions of data
4. DOne-way transmission that initiates, modifies, or terminates the functions of a device at a distance

What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?

1. APhotocopy all examination documents and forward them to the FCC for processing
2. BThree VEs must certify that the examinee is qualified for the license grant and that they have complied with the administering VE requirements
3. CIssue the examinee the new or upgrade license
4. DAll these choices are correct

Which of the following types of amateur station communications are prohibited?

1. ACommunications transmitted for hire or material compensation, except as otherwise provided in the rules
2. BCommunications that have political content, except as allowed by the Fairness Doctrine
3. CCommunications that have religious content
4. DCommunications in a language other than English

What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?

1. AA linearly polarized antenna
2. BA circularly polarized antenna
3. CAn isotropic antenna
4. DA log-periodic dipole array

What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?

1. ATransmitting on channels shared with cable TV
2. BUsing converted satellite TV dishes
3. CTransmitting on the abandoned TV channel 2
4. DUsing USB and demodulating the signal with a computer sound card

What type of equipment is commonly used to implement an amateur radio mesh network?

1. AA 2-meter VHF transceiver with a 1,200-baud modem
2. BA computer running EchoLink to provide interface from the radio to the internet
3. CA wireless router running custom firmware
4. DA 440 MHz transceiver with a 9,600-baud modem

What type of modulation is used by JT65?

1. AMultitone AFSK
2. BPSK
3. CRTTY
4. DQAM

Which of these digital modes has the highest data throughput under clear communication conditions?

1. AMFSK16
2. B170 Hz shift, 45 baud RTTY
3. CFT8
4. DPACTOR IV

What is a typical range for tropospheric duct propagation of microwave signals?

1. A10 miles to 50 miles
2. B100 miles to 300 miles
3. C1,200 miles
4. D2,500 miles

What is the approximate maximum range for signals using transequatorial propagation?

1. A1,000 miles
2. B2,500 miles
3. C5,000 miles
4. D7,500 miles

Which of the following signal paths is most likely to experience high levels of absorption when the A-index or K-index is elevated?

1. ATransequatorial
2. BThrough the auroral oval
3. CSporadic-E
4. DNVIS

What is the effect of aliasing on a digital oscilloscope when displaying a waveform?

1. AA false, jittery low-frequency version of the waveform is displayed
2. BThe waveform DC offset will be inaccurate
3. CCalibration of the vertical scale is no longer valid
4. DExcessive blanking occurs, which prevents display of the waveform

Which of the following can be used to determine the Q of a series-tuned circuit?

1. AThe ratio of inductive reactance to capacitive reactance
2. BThe frequency shift
3. CThe bandwidth of the circuit's frequency response
4. DThe resonant frequency of the circuit

What does a receiver noise floor of -174 dBm represent?

1. AThe receiver noise is 6 dB above the theoretical minimum
2. BThe theoretical noise in a 1 Hz bandwidth at the input of a perfect receiver at room temperature
3. CThe noise figure of a 1 Hz bandwidth receiver
4. DThe receiver noise is 3 dB above theoretical minimum

Which of the following describes problems caused by poor dynamic range in a receiver?

1. ASpurious signals caused by cross modulation and desensitization from strong adjacent signals
2. BOscillator instability requiring frequent retuning and loss of ability to recover the opposite sideband
3. CPoor weak signal reception caused by insufficient local oscillator injection
4. DOscillator instability and severe audio distortion of all but the strongest received signals

Which of the following types of noise can often be reduced by a digital noise reduction?

1. ABroadband white noise
2. BIgnition noise
3. CPower line noise
4. DAll these choices are correct

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 is admittance?

1. AThe inverse of impedance
2. BThe term for the gain of a field effect transistor
3. CThe inverse of reactance
4. DThe term for the on-impedance of a field effect transistor

Which of the following represents a pure inductive reactance in polar coordinates?

1. AA positive 45 degree phase angle
2. BA negative 45 degree phase angle
3. CA positive 90 degree phase angle
4. DA negative 90 degree phase angle

Why is it important to keep lead lengths short for components used in circuits for VHF and above?

1. ATo increase the thermal time constant
2. BTo minimize inductive reactance
3. CTo maintain component lifetime
4. DAll these choices are correct

In Figure E6-1, which is the schematic symbol for an N-channel dual-gate MOSFET?

1. A2
2. B4
3. C5
4. D6

In Figure E6-2, which is the schematic symbol for a Schottky diode?

1. A1
2. B6
3. C2
4. D3

Which of the following is an advantage of BiCMOS logic?

1. AIts simplicity results in much less expensive devices than standard CMOS
2. BIt is immune to electrostatic damage
3. CIt has the high input impedance of CMOS and the low output impedance of bipolar transistors
4. DAll these choices are correct

What is the equivalent circuit of a quartz crystal?

1. ASeries RLC in parallel with a shunt C representing electrode and stray capacitance
2. BParallel RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance
3. CSeries RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance
4. DParallel RLC, where C is the series combination of resonance capacitance of the crystal and electrode and stray capacitance

What type of transmission line is often used for connections to MMICs?

1. AMiniature coax
2. BCircular waveguide
3. CParallel wire
4. DMicrostrip

What absorbs the energy from light falling on a photovoltaic cell?

1. AProtons
2. BPhotons
3. CElectrons
4. DHoles

Which of the following circuits continuously alternates between two states without an external clock signal?

1. AMonostable multivibrator
2. BJ-K flip-flop
3. CT flip-flop
4. DAstable multivibrator

What is characteristic of an emitter follower (or common collector) amplifier?

1. ALow input impedance and phase inversion from input to output
2. BDifferential inputs and single output
3. CActs as an OR circuit if one input is grounded
4. DInput and output signals in-phase

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 does a switchmode voltage regulator work?

1. ABy alternating the output between positive and negative voltages
2. BBy varying the duty cycle of pulses input to a filter
3. CBy varying the conductivity of a pass element
4. DBy switching between two Zener diode reference voltages

What are the principal frequencies that appear at the output of a mixer?

1. ATwo and four times the input frequency
2. BThe square root of the product of input frequencies
3. CThe two input frequencies along with their sum and difference frequencies
4. D1.414 and 0.707 times the input frequency

What type of digital signal processing filter is used to generate an SSB signal?

1. AAn adaptive filter
2. BA notch filter
3. CA Hilbert-transform filter
4. DAn elliptical filter

What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 3,300 ohms and RF is 47 kilohms?

1. A28
2. B14
3. C7
4. D0.07

How is positive feedback supplied in a Pierce oscillator?

1. AThrough a tapped coil
2. BThrough link coupling
3. CThrough a neutralizing capacitor
4. DThrough a quartz crystal

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 signal?

1. AThe ratio of frequency deviation to modulating signal frequency
2. BThe ratio of modulating signal amplitude to frequency deviation
3. CThe modulating signal frequency divided by the bandwidth of the transmitted signal
4. DThe bandwidth of the transmitted signal divided by the modulating signal frequency

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

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

What spread spectrum communications technique uses a high-speed binary bit stream to shift the phase of an RF carrier?

1. AFrequency hopping
2. BDirect sequence
3. CBinary phase-shift keying
4. DPhase compandored spread spectrum

What is an isotropic radiator?

1. AA calibrated, unidirectional antenna used to make precise antenna gain measurements
2. BAn omnidirectional, horizontally polarized, precisely calibrated antenna used to make field measurements of antenna gain
3. CA hypothetical, lossless antenna having equal radiation intensity in all directions used as a reference for antenna gain
4. DA spacecraft antenna used to direct signals toward Earth

What is the principle of a Method of Moments analysis?

1. AA wire is modeled as a series of segments, each having a uniform value of current
2. BA wire is modeled as a single sine-wave current generator
3. CA wire is modeled as a single sine-wave voltage source
4. DA wire is modeled as a series of segments, each having a distinct value of voltage across it

Which of the following describes a Zepp antenna?

1. AA horizontal array capable of quickly changing the direction of maximum radiation by changing phasing lines
2. BAn end-fed half-wavelength dipole
3. CAn omni-directional antenna commonly used for satellite communications
4. DA vertical array capable of quickly changing the direction of maximum radiation by changing phasing lines

What happens to SWR bandwidth when one or more loading coils are used to resonate an electrically short antenna?

1. AIt is increased
2. BIt is decreased
3. CIt is unchanged if the loading coil is located at the feed point
4. DIt is unchanged if the loading coil is located at a voltage maximum point

What matching system uses a short length of transmission line connected in parallel with the feed line at or near the feed point?

1. AGamma match
2. BDelta match
3. CT-match
4. DStub match

How does parallel conductor transmission line compare to coaxial cable with a plastic dielectric?

1. ALower loss
2. BHigher SWR
3. CSmaller reflection coefficient
4. DLower velocity factor

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

How can the output voltage of a multiple-turn receiving loop antenna be increased?

1. ABy reducing the permeability of the loop shield
2. BBy utilizing high impedance wire for the coupling loop
3. CBy increasing the number of turns and/or the area enclosed by the loop
4. DAll these choices are correct

What hazard is created by operating at microwave frequencies?

1. AMicrowaves are ionizing radiation
2. BThe high gain antennas commonly used can result in high exposure levels
3. CMicrowaves are in the frequency range where wave velocity is higher
4. DThe extremely high frequency energy can damage the joints of antenna structures