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118 Cards in this Set
- Front
- Back
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Which of the following stations transmits signals over the air from a remote receive site to a repeater for retransmission?
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Auxiliary station
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Which frequency is within the 6 meter band?
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52.525 MHz
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Which amateur band are you using when your station is transmitting on 146.52 MHz?
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2 meter band
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Which 70 cm frequency is authorized to a Technician Class license holder operating in ITU Region 2?
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443.350 MHz
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Which 23 cm frequency is authorized to a Technician Class operator license?
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1296 MHz
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What amateur band are you using if you are transmitting on 223.50 MHz?
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1.25 meter band
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Which of the bands available to Technician Class operators have mode-restricted sub-bands?
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The 6 meter, 2 meter, and 1.25 meter bands
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What emission modes are permitted in the mode-restricted sub-bands at 50.0 to 50.1 MHz and 144.0 to 144.1 MHz?
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CW only
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Under which of the following types of control is it permissible for the control operator to be at a location other than the control point?
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Automatic control
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What type of control is being used for a repeater when the control operator is not present at a control point?
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Automatic control
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What type of control is used when the control operator is not at the station location but can indirectly manipulate the operating adjustments of a station?
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Remote
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What type of identification is being used when identifying a station on the air as "Race Headquarters"?
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Tactical call
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What method of call sign identification is required for a station transmitting phone signals?
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Send the call sign using CW or phone emission
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What type of amateur station simultaneously retransmits the signal of another amateur station of a different channel or channels?
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Repeater station
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What is the most common repeater frequency offset in the 2 meter band?
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Plus or minus 600 MHz
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What is the national calling frequency for FM simplex operations in the 70 cm band?
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446,000 MHz
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What is a common repeater frequency offset in the 70 cm band?
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Plus or minus 5 MHz
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What is the term used to describe an amateur station that is transmitting and receiving on the same frequency?
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Simplex communication
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What is the term used to describe the use of a sub-audible tone transmitted with normal voice audio to open the squelch of a receiver?
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CTCSS
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Which of the following describes the muting the receiver audio controlled solely by the presence or absence of an RF signal?
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Carrier squelch
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Which of the following common problems might cause you to be able to hear but not access a repeater even when transmitting with the proper offset?
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The repeater receiver requires audio tone burst ...
The repeater receiver requires a CTCSS tone for access The repeater receiver may require a DCS tone ... ALL OF THESE CHOICES ARE CORRECT |
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What determines the amount of deviation of an FM signal?
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The amplitude of the modulating signal
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What happens when the deviation of an FM transmitter is increased?
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Its signal occupies more bandwidth
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What should you do if you receive a report that your station's transmissions are causing splatter or interference on nearby frequencies?
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Check your transmitter for off-frequency operation or spurious emmisions
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What is the proper course of action if your station's transmission unintentionally interferes with another station?
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Properly identify your transmission and move to a different frequency
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Which of the following methods is encouraged by the FCC when identifying your station when using a phone?
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Use of a phonetic alphabet
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What is the "Q" signal used to indicate that you are receiving interference from other stations?
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QRM
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What is the "Q" signal used to indicate that you are changing frequency?
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QSY
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What is the preamble in a formal traffic message?
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The information needed to track the message as it passes through the amateur radio traffic handling system
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What is meant by the term "check" in reference to a formal traffic message?
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The check is a count of the number of words or word equivalents in the text portion of the message
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What can happen if the antennas at opposite ends of a VHF or UHF line of sight radio link are not using the same polarization?
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Signals could be significantly weaker
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What type of wave carries radio signals between transmitting and receiving stations?
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Electromagnetic
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What is the cause of irregular fading of signals from distant stations during times of generally good reception?
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Random combining of signals arriving via different path lengths
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Which of the following is a common effect of "skip" reflections between the Earth and the ionosphere?
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The polarization of the original signal is randomized
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What may occur if VHF or UHF data signals propagate over multiple paths?
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Error rates are likely to increase
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What are the frequency limits of the VHF spectrum?
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30 to 300 MHz
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What are the frequency limits of the UHF spectrum?
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300 to 3000 MHz
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What frequency range is referred to as HF?
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3 to 30 MHz
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What is the approximate velocity of a radio wave as it travels through free space?
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300,000,000 meters per second
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Why are "direct" (not via a repeater) UHF signals rarely heard from stations outside your local coverage area?
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UHF signals are usually not reflected by the ionosphere
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Which of the following might be happening when VHF signals are being received from long distances?
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Signals are being refracted from a sporadic E layer
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What is a characteristic of VHF signals received via auroral reflection?
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The signals exhibit rapid fluctuations of strength and often sound distorted
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Which of the following propagation types is most commonly associated with occasional strong over-the-horizon signals on the 10, 6 and 2 meter bands?
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Sporadic E
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What mode is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis?
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Tropospheric scatter
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What band is best suited to communicating via meteor scatter?
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6 meters
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What causes "tropospheric ducting"?
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Temperature inversions in the atmosphere
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What type of filter should be connected to a TV receiver as the first step in trying to prevent RF overload from a nearby 2 meter transmitter?
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Band-reject filter
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Which of the following would be connected between a transceiver and computer in a packet-radio station?
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Terminal node controller
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How is the computer's sound card used when conducting digital communications using a computer?
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The sound card provides audio to the microphone input and converts received audio to digital form
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Which would you use to reduce RF current flowing on the shield of an audio cable?
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Ferrite choke
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What may happen if a transmitter is operated with the microphone gain set too high?
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The output signal may become distorted
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Which of the following can be used to enter the operating frequency on a modern transceiver?
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The keypad or VFO knob
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What is the purpose of the squelch control on a transceiver?
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To mute receiver output noise when no signal is being received
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Which of the following would reduce ignition interference to a receiver?
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Turn on the noise blanker
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Which of the following controls could be used if the voice pitch of a signal-sideband signal seems too high or low?
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The receiver RIT or clarifier
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What does the term RIT mean?
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Receiver Incremental Tuning
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What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
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Permits noise or interference reduction by selecting a bandwidth matching the mode
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Which of the following is an appropriate receive filter to select in order to minimize noise and interference for SSB reception?
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2400 Hz
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Which of the following is an appropriate receive filter to select in order to minimize noise and interference for CW reception?
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500 Hz
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Which of the following describes the common meaning of the term "repeater offset"?
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The difference between the repeater's transmit and receive frequencies
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Which battery type is not rechargeable?
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Carbon-zinc
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What is the function of a product detector?
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Detect CW and SSB signals
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What type of receiver is shown in Figure T6?
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Single-conversion superheterodyne
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What is the function of a mixer in a superheterodyne receiver?
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To shift the incoming signal to an intermediate frequency
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What circuit is pictured in Figure T7, if block 1 is a frequency discriminator?
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An FM receiver
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What is the function of block 1 if figure T4 is a simple CW transmitter?
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Oscillator
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What device takes the output of a low-powered 28 MHz SSB exciter and produces a 222 MHz output-signal?
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Transverter
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If figure T5 represents a transceiver in which block 1 is the transmitter portion and block 3 is the receiver portion, what is the function of block 2?
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A transmit-receive switch
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Which of the following circuits combines a speech signal and an RF carrier?
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Modulator
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Which of the following devices is most useful for VHF weak-signal communication?
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A multi-mode VHF transceiver
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What device increases the low-power output from a handheld transceiver?
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An RF power amplifier
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Which of the following circuits demodulates FM signals?
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Discriminator
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Which term describes the ability of a receiver to discriminate between multiple signals?
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Selectivity
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What can you do if you are told your FM handheld or mobile transceiver is over deviating?
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Talk farther away from the microphone
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What is meant by fundamental overload in reference to a receiver?
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Interference caused by very strong signals
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Which of the following may be a cause of radio frequency interference?
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Fundamental overload
Harmonics Spurious emissions ALL OF THESE CHOICES ARE CORRECT |
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What is the most likely cause of interference to a non-cordless telephone from a nearby transmitter?
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The telephone is inadvertently acting as a radio receiver
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What is a logical first step when attempting to cure a radio frequency interference problem in a nearby telephone?
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Install an RF filter at the telephone
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Which of the following may be useful in correcting a radio interference problem?
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Snap-on ferrite chokes
Low-pass and high-pass filters Band-reject and band-pass filters ALL OF THESE CHOICES ARE CORRECT |
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What might be the problem if you receive a report that your audio signal through the repeater is distorted or unintelligible?
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Your transmitter may be slightly off frequency
Your batteries may be running low You could be in a bad location ALL OF THESE CHOICES ARE CORRECT |
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What is a symptom of RF feedback in a transmitter or transceiver?
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Reports of garbled, distorted, or unintelligible transmissions
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Which of the following is a form of amplitude modulation?
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Single sideband
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What type of modulation is most commonly used for VHF packet radio transmissions?
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FM
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Which type of voice modulation is most often used for long-distance or weak signal contacts on the VHF and UHF bands?
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SSB
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Which type of modulation is most commonly used for VHF and UHF voice repeaters?
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FM
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Which of the following types of emissions has the narrowest bandwidth?
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CW
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Which sideband is normally used for 10 meter HF, VHF and UHF single-sideband communications?
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Upper sideband
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What is the primary advantage of single sideband over FM voice transmission?
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SSB signals have narrower bandwidth
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What is the approximate bandwidth of a single sideband voice signal?
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3 kHz
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What is the approximate bandwidth of a VHF repeater FM phone signal?
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Between 5 and 15 kHz
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What is the typical bandwidth of analog fast-scan TV transmissions on the 70 cm band?
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About 6 MHz
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What is the approximate maximum bandwidth required to transmit a CW signal?
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150 Hz
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What is meant by the statement that a satellite is operating in "mode U/V"?
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The satellite uplink is in the 70 cm band and the downlink is in the 2 meter band
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What causes "spin fading" when referring to satellite signals?
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Rotation of the satellite and its antennas
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What is a commonly used method of sending signals to and from a digital satellite?
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FM Packet
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Which of the following methods is used to locate sources of noise interference or jamming?
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Radio direction finding
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Which of these items would be useful for a hidden transmitter hunt?
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A directional antenna
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How might you obtain a list of active nodes that use VoIP?
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From a repeater directory
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How do you select a specific IRLP node when using a portable transceiver?
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Use the keypad to transmit the IRLP node ID
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What name is given to an amateur radio station that is used to connect other amateur stations to the Internet?
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A gateway
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Which of the following emission modes may be used by a Technician Class operator between 219 and 220 MHz?
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Data
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What is PSK31?
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A low-rate data transmission mode
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What code is used when sending CW in the amateur bands?
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International Morse
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Which of the following can be used to transmit CW in the amateur bands?
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Straight Key
Electronic Keyer Computer Keyboard ALL OF THESE CHOICES ARE CORRECT |
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What is the approximate length, in inches, of a quarter-wavelength vertical antenna for 146 MHz?
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19
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What is the approximate length, in inches, of a 6 meter 1/2 wavelength wire dipole antenna?
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112
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In which direction is the radiation strongest from a half-wave dipole antenna in free space?
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Broadside to the antenna
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What is meant by the gain of an antenna?
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The increase in signal strength in a specified direction when compared to a reference antenna
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Which of the following is true of PL-259 type coax connectors?
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They are commonly used at HF frequencies
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Which of the following types of feedline has the lowest loss at VHF and UHF?
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Air-insulated hard line
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Which is a commonly accepted value for the lowest voltage that can cause a dangerous electric shock?
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30 volts
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What type of radiation are VHF and UHF radio signals?
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Non-ionizing radiation
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Which of the following frequencies has the lowest Maximum Permissible Exposure limit?
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50 MHz
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What is the maximum power level that an amateur radio station may use at VHF frequencies before an RF exposure evaluation is required?
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50 watts PEP at the antenna
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What factors affect the RF exposure of people near an amateur station antenna?
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Frequency and power level of the RF field
Distance from the antenna to a person Radiation pattern of the antenna ALL OF THESE CHOICES ARE CORRECT |
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Which of the following actions might amateur operators take to prevent exposure to RF radiation in excess of FCC-supplied limits?
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Relocate antennas
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How can you make sure your station stays in compliance with RF safety regulations?
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By re-evaluating the station whenever an item of equipment is changed
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What is meant by "duty cycle" when referring to RF exposure?
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The radio of on-air time to operating time of a transmitted signal
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