E0A03: Which of the following would be a practical way to estimate whether the RF fields produced by an amateur radio station are within permissible MPE limits?

Use a calibrated antenna analyzer

Use a hand calculator plus Smith-chart equations to calculate the fields

All of the choices are correct

E1A13: Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?

Only a person with an FCC Marine Radio

Only a person named in an amateur station license grant

Any person named in an amateur station license grant or a person holding an unrestricted Radiotelephone Operator Permit

E1B03: Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

3 miles

10 miles

30 miles

E1C04: When may an automatically controlled station retransmit third party communications?

Never

When specifically agreed upon by the sending and receiving stations

When approved by the National Telecommunication and Information Administration

E1D09: Which amateur service UHF bands have frequencies available for a space station?

70 cm

70 cm and 33 cm

33 cm and 13 cm

E1E13: What are the consequences of failing to appear for re-administration of an examination when so directed by the FCC?

The person may be fined or imprisoned

The licensee is disqualified from any future examination for an amateur operator license grant

All these choices are correct

E1F09: Which of the following conditions apply when transmitting spread spectrum emission?

A station transmitting SS emission must not cause harmful interference to other stations employing other authorized emissions

The transmitting station must be in an area regulated by the FCC or in a country that permits SS emissions

The transmission must not be used to obscure the meaning of any communication

E2A07: Which of the following types of signals can be relayed through a linear transponder?

FM and CW

SSB and SSTV

PSK and Packet

E2B08: Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television?

Frequency-modulated sub-carrier

A separate VHF or UHF audio link

Frequency modulation of the video carrier

E2C09: How does the spread-spectrum technique of frequency hopping work?

If interference is detected by the receiver it will signal the transmitter to change frequencies

If interference is detected by the receiver it will signal the transmitter to wait until the frequency is clear

A pseudo-random binary bit stream is used to shift the phase of an RF carrier very rapidly in a particular sequence

E2D12: How does JT65 improve EME communications?

It controls the receiver to track Doppler shift

It supplies signals to guide the antenna to track the Moon

All of these choices are correct

E2E05: How does ARQ accomplish error correction?

Special binary codes provide automatic correction

Special polynomial codes provide automatic correction

If errors are detected, redundant data is substituted

E3A07: What frequency range would you normally tune to find EME signals in the 70 cm band?

430.000 - 430.150 MHz

430.100 - 431.100 MHz

431.100 - 431.200 MHz

E3B06: Which of the following amateur bands most frequently provides long-path propagation?

80 meters

10 meters

6 meters

E3C07: How does the radiation pattern of a horizontally polarized 3-element beam antenna vary with its height above ground?

The main lobe takeoff angle increases with increasing height

The horizontal beam width increases with height

The horizontal beam width decreases with height

E4A07: Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge to measure antenna SWR?

Antenna analyzers automatically tune your antenna for resonance

Antenna analyzers display a time-varying representation of the modulation envelope

All of these choices are correct

E4B06: How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

100 watts

125 watts

25 watts

E4C06: A CW receiver with the AGC off has an equivalent input noise power density of -174 dBm/Hz. What would be the level of an unmodulated carrier input to this receiver that would yield an audio output SNR of 0 dB in a 400 Hz noise bandwidth?

174 dBm

-164 dBm

-155 dBm

E4D13: Which of the following can cause receiver desensitization?

Audio gain adjusted too low

Audio bias adjusted too high

Squelch gain misadjusted

E4E09: What undesirable effect can occur when using an IF noise blanker?

Received audio in the speech range might have an echo effect

The audio frequency bandwidth of the received signal might be compressed

FM signals can no longer be demodulated

E5A01: What can cause the voltage across reactances in series to be larger than the voltage applied to them?

Capacitance

Conductance

Resistance

E5B06: How long does it take for an initial charge of 800 V DC to decrease to 294 V DC in a 450-microfarad capacitor when a 1-megohm resistor is connected across it?

4.50 seconds

9 seconds

900 seconds

E5C08: In polar coordinates, what is the impedance of a network comprised of a 300-ohm-reactance inductor in series with a 400-ohm resistor?

400 ohms at an angle of 27 degrees

500 ohms at an angle of 47 degrees

700 ohms at an angle of 57 degrees

E5D06: In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?

In the same direction as the current

In a direction opposite to the current

In all directions; omnidirectional

E6A06: What is the beta of a bipolar junction transistor?

The frequency at which the current gain is reduced to 1

The breakdown voltage of the base to collector junction

The switching speed of the transistor

E6B02: What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?

Much higher reverse voltage breakdown

Controlled reverse avalanche voltage

Enhanced carrier retention time

E6C05: Which of the following is an advantage of CMOS logic devices over TTL devices?

Differential output capability

Lower distortion

Immune to damage from static discharge

E6D05: What is a liquid-crystal display (LCD)?

A modern replacement for a quartz crystal oscillator which displays its fundamental frequency

A frequency-determining unit for a transmitter or receiver

A display that uses a glowing liquid to remain brightly lit in dim light

E6E11: Which of the following materials is likely to provide the highest frequency of operation when used in MMICs?

Silicon

Silicon nitride

Silicon dioxide

E6F09: What is the efficiency of a photovoltaic cell?

The output RF power divided by the input dc power

The effective payback period

The open-circuit voltage divided by the short-circuit current under full illumination

E7A04: How many flip-flops are required to divide a signal frequency by 4?

1

4

8

E7B05: What can be done to prevent unwanted oscillations in an RF power amplifier?

Tune the stage for maximum SWR

Tune both the input and output for maximum power

Use a phase inverter in the output filter

E7C05: Which filter type is described as having ripple in the passband and a sharp cutoff?

A Butterworth filter

An active LC filter

A passive op-amp filter

E7D14: What is one purpose of a "bleeder" resistor in a conventional (unregulated) power supply?

To cut down on waste heat generated by the power supply

To balance the low-voltage filament windings

To boost the amount of output current

E7E14: What is meant by direct conversion when referring to a software defined receiver?

Software is converted from source code to object code during operation of the receiver

Incoming RF is converted to the IF frequency by rectification to generate the control voltage for a voltage controlled oscillator

Software is generated in machine language, avoiding the need for compilers

E7F02: Which of the following would be used to reduce a signal's frequency by a factor of ten?

A preamp

A marker generator

A flip-flop

E7G11: What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 3300 ohms and RF is 47 kilohms?

28

7

0.07

E7H07: What is a magnetron oscillator?

An oscillator in which the output is fed back to the input by the magnetic field of a transformer

A crystal oscillator in which variable frequency is obtained by placing the crystal in a strong magnetic field

A reference standard oscillator in which the oscillations are synchronized by magnetic coupling to a rubidium gas tube

E8A15: What would the waveform of a stream of digital data bits look like on a conventional oscilloscope?

A series of sine waves with evenly spaced gaps

A running display of alpha-numeric characters

None of the above; this type of signal cannot be seen on a conventional oscilloscope

E8B09: What is meant by deviation ratio?

The ratio of the audio modulating frequency to the center carrier frequency

The ratio of the carrier center frequency to the audio modulating frequency

The ratio of the highest audio modulating frequency to the average audio modulating frequency

E8C12: What is the advantage of including a parity bit with an ASCII character stream?

Faster transmission rate

The signal can overpower interfering signals

Foreign language characters can be sent

E8D06: What is the advantage of using a peak-reading wattmeter to monitor the output of a SSB phone transmitter?

It is easier to determine the correct tuning of the output circuit

It makes it easier to detect high SWR on the feed line

It can determine if any flat-topping is present during modulation peaks

E9A02: How much gain does a 1/2-wavelength dipole in free space have compared to an isotropic antenna?

1.55 dB

3.05 dB

4.30 dB

E9B10: What is the principle of a Method of Moments analysis?

A wire is modeled as a single sine-wave current generator

A wire is modeled as a series of points, each having a distinct location in space

A wire is modeled as a series of segments, each having a distinct value of voltage across it

E9C10: How many elevation lobes appear in the forward direction of the antenna radiation pattern shown in Figure E9-2?

3

1

7

E9D02: How can linearly polarized Yagi antennas be used to produce circular polarization?

Stack two Yagis, fed 90 degrees out of phase, to form an array with the respective elements in parallel planes

Stack two Yagis, fed in phase, to form an array with the respective elements in parallel planes

Arrange two Yagis collinear to each other, with the driven elements fed 180 degrees out of phase

E9E01: What system matches a high-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?

The gamma matching system

The omega matching system

The stub matching system

E9F14: What impedance does a 1/2-wavelength transmission line present to a generator when the line is shorted at the far end?

Very high impedance

The same as the characteristic impedance of the line

The same as the output impedance of the generator

E9G10: What do the arcs on a Smith chart represent?

Frequency

SWR

Points with constant resistance

E9H08: What is the function of a sense antenna?

It increases the sensitivity of a DF antenna array

It allows DF antennas to receive signals at different vertical angles

It provides diversity reception that cancels multipath signals