Ham License Flash Cards
Technician Class Exam Question Pool
For whom is the Amateur Radio Service intended?
What agency regulates and enforces the rules for the Amateur Radio Service in the United States?
Which part of the FCC rules contains the rules and regulations governing the Amateur Radio Service?
Which of the following meets the FCC definition of harmful interference?
What is the FCC Part 97 definition of a space station?
What is the FCC Part 97 definition of telecommand?
What is the FCC Part 97 definition of telemetry?
Which of the following entities recommends transmit/receive channels and other parameters for auxiliary and repeater stations?
Who selects a Frequency Coordinator?
What is the FCC Part 97 definition of an amateur station?
Which of the following stations transmits signals over the air from a remote receive site to a repeater for retransmission?
What is the ITU?
North American amateur stations are located in which ITU region?
Which frequency is within the 6 meter band?
Which amateur band are you using when your station is transmitting on 146.52 MHz?
Which 70 cm frequency is authorized to a Technician Class license holder operating in ITU Region 2?
Which 23 cm frequency is authorized to a Technician Class operator license?
What amateur band are you using if you are transmitting on 223.50 MHz?
What do the FCC rules mean when an amateur frequency band is said to be available on a secondary basis?
Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?
Which of the bands available to Technician Class operators have mode-restricted subbands?
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?
Which type of call sign has a single letter in both the prefix and suffix?
Which of the following is a valid US amateur radio station call sign?
What types of international communications are permitted by an FCC-licensed amateur station?
When are you allowed to operate your amateur station in a foreign country?
What must you do if you are operating on the 23 cm band and learn that you are interfering with a radiolocation station outside the United States?
From which of the following may an FCC-licensed amateur station transmit, in addition to places where the FCC regulates communications?
What may result when correspondence from the FCC is returned as undeliverable because the grantee failed to provide the correct mailing address?
What is the normal term for an FCC-issued primary station/operator license grant?
What is the grace period following the expiration of an amateur license within which the license may be renewed?
How soon may you operate a transmitter on an amateur service frequency after you pass the examination required for your first amateur radio license?
If your license has expired and is still within the allowable grace period, may you continue to operate a transmitter on amateur service frequencies?
With which countries are FCC-licensed amateur stations prohibited from exchanging communications?
On which of the following occasions may an FCC-licensed amateur station exchange messages with a U.S. military station?
When is the transmission of codes or ciphers allowed to hide the meaning of a message transmitted by an amateur station?
What is the only time an amateur station is authorized to transmit music?
When may amateur radio operators use their stations to notify other amateurs of the availability of equipment for sale or trade?
Which of the following types of transmissions are prohibited?
When is an amateur station authorized to automatically retransmit the radio signals of other amateur stations?
When may the control operator of an amateur station receive compensation for operating the station?
Under which of the following circumstances are amateur stations authorized to transmit signals related to broadcasting, program production, or news gathering, assuming no other means is available?
What is the meaning of the term broadcasting in the FCC rules for the amateur services?
Which of the following types of communications are permitted in the Amateur Radio Service?
When must an amateur station have a control operator?
Who is eligible to be the control operator of an amateur station?
Who must designate the station control operator?
What determines the transmitting privileges of an amateur station?
What is an amateur station control point?
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?
When the control operator is not the station licensee, who is responsible for the proper operation of the station?
What type of control is being used for a repeater when the control operator is not present at a control point?
What type of control is being used when transmitting using a handheld radio?
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?
Who does the FCC presume to be the control operator of an amateur station, unless documentation to the contrary is in the station records?
What type of identification is being used when identifying a station on the air as "Race Headquarters"?
When using tactical identifiers, how often must your station transmit the station's FCC-assigned call sign?
When is an amateur station required to transmit its assigned call sign?
Which of the following is an acceptable language for use for station identification when operating in a phone sub-band?
What method of call sign identification is required for a station transmitting phone signals?
Which of the following formats of a self-assigned indicator is acceptable when identifying using a phone transmission?
Which of the following restrictions apply when appending a self-assigned call sign indicator?
When may a Technician Class licensee be the control operator of a station operating in an exclusive Extra Class operator segment of the amateur bands?
What type of amateur station simultaneously retransmits the signal of another amateur station on a different channel or channels?
Who is accountable should a repeater inadvertently retransmit communications that violate the FCC rules?
To which foreign stations do the FCC rules authorize the transmission of nonemergency third party communications?
How many persons are required to be members of a club for a club station license to be issued by the FCC?
When must the station licensee make the station and its records available for FCC inspection?
What is the most common repeater frequency offset in the 2 meter band?
What is the national calling frequency for FM simplex operations in the 70 cm band?
What is a common repeater frequency offset in the 70 cm band?
What is an appropriate way to call another station on a repeater if you know the other station's call sign?
What should you transmit when responding to a call of CQ?
What must an amateur operator do when making on-air transmissions to test equipment or antennas?
Which of the following is true when making a test transmission?
What is the meaning of the procedural signal "CQ"?
What brief statement is often used in place of "CQ" to indicate that you are listening on a repeater?
What is a band plan, beyond the privileges established by the FCC?
What are the FCC rules regarding power levels used in the amateur bands?
What is the term used to describe an amateur station that is transmitting and receiving on the same frequency?
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?
Which of the following describes the muting of receiver audio controlled solely by the presence or absence of an RF signal?
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?
What determines the amount of deviation of an FM signal?
What happens when the deviation of an FM transmitter is increased?
What should you do if you receive a report that your station's transmissions are causing splatter or interference on nearby frequencies?
What is the proper course of action if your station's transmission unintentionally interferes with another station?
Which of the following methods is encouraged by the FCC when identifying your station when using phone?
What is the "Q" signal used to indicate that you are receiving interference from other stations?
What is the "Q" signal used to indicate that you are changing frequency?
What set of rules applies to proper operation of your station when using amateur radio at the request of public service officials?
Who must submit the request for a temporary waiver of Part 97.113 to allow amateur radio operators to provide communications on behalf of their employers during a government sponsored disaster drill?
When is it legal for an amateur licensee to provide communications on behalf of their employer during a government sponsored disaster drill or exercise?
What do RACES and ARES have in common?
What is the Radio Amateur Civil Emergency Service?
Which of the following is common practice during net operations to get the immediate attention of the net control station when reporting an emergency?
What should you do to minimize disruptions to an emergency traffic net once you have checked in?
What is usually considered to be the most important job of an amateur operator when handling emergency traffic messages?
When may an amateur station use any means of radio communications at its disposal for essential communications in connection with immediate safety of human life and protection of property?
What is the preamble in a formal traffic message?
What is meant by the term "check" in reference to a formal traffic message?
What should you do if another operator reports that your station's 2 meter signals were strong just a moment ago, but now they are weak or distorted?
Why are UHF signals often more effective from inside buildings than VHF signals?
What antenna polarization is normally used for long-distance weak-signal CW and SSB contacts using the VHF and UHF bands?
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?
When using a directional antenna, how might your station be able to access a distant repeater if buildings or obstructions are blocking the direct line of sight path?
What term is commonly used to describe the rapid fluttering sound sometimes heard from mobile stations that are moving while transmitting?
What type of wave carries radio signals between transmitting and receiving stations?
What is the cause of irregular fading of signals from distant stations during times of generally good reception?
Which of the following is a common effect of "skip" reflections between the Earth and the ionosphere?
What may occur if VHF or UHF data signals propagate over multiple paths?
Which part of the atmosphere enables the propagation of radio signals around the world?
What is the name for the distance a radio wave travels during one complete cycle?
What term describes the number of times per second that an alternating current reverses direction?
What are the two components of a radio wave?
How fast does a radio wave travel through free space?
How does the wavelength of a radio wave relate to its frequency?
What is the formula for converting frequency to wavelength in meters?
What property of radio waves is often used to identify the different frequency bands?
What are the frequency limits of the VHF spectrum?
What are the frequency limits of the UHF spectrum?
What frequency range is referred to as HF?
What is the approximate velocity of a radio wave as it travels through free space?
Why are "direct" (not via a repeater) UHF signals rarely heard from stations outside your local coverage area?
Which of the following might be happening when VHF signals are being received from long distances?
What is a characteristic of VHF signals received via auroral reflection?
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?
What is meant by the term "knife-edge" propagation?
What mode is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis?
What band is best suited to communicating via meteor scatter?
What causes "tropospheric ducting"?
What is generally the best time for long-distance 10 meter band propagation?
What is the radio horizon?
Why do VHF and UHF radio signals usually travel somewhat farther than the visual line of sight distance between two stations?
Which of the following is true concerning the microphone connectors on amateur transceivers?
What could be used in place of a regular speaker to help you copy signals in a noisy area?
Which is a good reason to use a regulated power supply for communications equipment?
Where must a filter be installed to reduce harmonic emissions?
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?
Which of the following would be connected between a transceiver and computer in a packet radio station?
How is the computer's sound card used when conducting digital communications using a computer?
Which type of conductor is best to use for RF grounding?
Which would you use to reduce RF current flowing on the shield of an audio cable?
What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver's receive audio?
Where should a mobile transceiver's power negative connection be made?
What may happen if a transmitter is operated with the microphone gain set too high?
Which of the following can be used to enter the operating frequency on a modern transceiver?
What is the purpose of the squelch control on a transceiver?
What is a way to enable quick access to a favorite frequency on your transceiver?
Which of the following would reduce ignition interference to a receiver?
Which of the following controls could be used if the voice pitch of a single-sideband signal seems too high or low?
What does the term "RIT" mean?
What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
Which of the following is an appropriate receive filter to select in order to minimize noise and interference for SSB reception?
Which of the following is an appropriate receive filter to select in order to minimize noise and interference for CW reception?
Which of the following describes the common meaning of the term "repeater offset"?
Electrical current is measured in which of the following units?
Electrical power is measured in which of the following units?
What is the name for a current that flows only in one direction?
How much voltage does a mobile transceiver usually require?
Which of the following is a good electrical conductor?
Which of the following is a good electrical insulator?
What is the name for a current that reverses direction on a regular basis?
Which term describes the rate at which electrical energy is used?
What is the basic unit of electromotive force?
How many milliamperes is 1.5 amperes?
What is another way to specify a radio signal frequency of 1,500,000 hertz?
How many volts are equal to one kilovolt?
How many volts are equal to one microvolt?
Which of the following is equivalent to 500 milliwatts?
If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
If a frequency readout calibrated in megahertz shows a reading of 3.525 MHz, what would it show if it were calibrated in kilohertz?
How many microfarads are 1,000,000 picofarads?
What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts?
What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?
What is the approximate amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts?
What is the ability to store energy in an electric field called?
What is the basic unit of capacitance?
What is the ability to store energy in a magnetic field called?
What is the basic unit of inductance?
What is the unit of frequency?
What is the abbreviation that refers to radio frequency signals of all types?
What is a usual name for electromagnetic waves that travel through space?
What is the formula used to calculate electrical power in a DC circuit?
How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?
How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?
How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?
What formula is used to calculate current in a circuit?
What formula is used to calculate voltage in a circuit?
What formula is used to calculate resistance in a circuit?
What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts?
What is the resistance in a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes?
What is the resistance of a circuit that draws 4 amperes from a 12-volt source?
What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
What is the current flowing through a 100-ohm resistor connected across 200 volts?
What is the current flowing through a 24-ohm resistor connected across 240 volts?
What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?
What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?
What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it?
What electrical component is used to oppose the flow of current in a DC circuit?
What type of component is often used as an adjustable volume control?
What electrical parameter is controlled by a potentiometer?
What electrical component stores energy in an electric field?
What type of electrical component consists of two or more conductive surfaces separated by an insulator?
What type of electrical component stores energy in a magnetic field?
What electrical component is usually composed of a coil of wire?
What electrical component is used to connect or disconnect electrical circuits?
What electrical component is used to protect other circuit components from current overloads?
What is the nominal voltage of a fully charged nickel-cadmium cell?
Which battery type is not rechargeable?
What class of electronic components is capable of using a voltage or current signal to control current flow?
What electronic component allows current to flow in only one direction?
Which of these components can be used as an electronic switch or amplifier?
Which of these components is made of three layers of semiconductor material?
Which of the following electronic components can amplify signals?
How is a semiconductor diode's cathode lead usually identified?
What does the abbreviation "LED" stand for?
What does the abbreviation "FET" stand for?
What are the names of the two electrodes of a diode?
Which semiconductor component has an emitter electrode?
Which semiconductor component has a gate electrode?
What is the term that describes a transistor's ability to amplify a signal?
What is the name for standardized representations of components in an electrical wiring diagram?
What is component 1 in figure T1? (Figure unavailable)
What is component 2 in figure T1? (Figure unavailable)
What is component 3 in figure T1? (Figure unavailable)
What is component 4 in figure T1? (Figure unavailable)
What is component 6 in figure T2? (Figure unavailable)
What is component 8 in figure T2? (Figure unavailable)
What is component 9 in figure T2? (Figure unavailable)
What is component 4 in figure T2? (Figure unavailable)
What is component 3 in figure T3? (Figure unavailable)
What is component 4 in figure T3? (Figure unavailable)
What do the symbols on an electrical circuit schematic diagram represent?
Which of the following is accurately represented in electrical circuit schematic diagrams?
Which of the following devices or circuits changes an alternating current into a varying direct current signal?
What best describes a relay?
What type of switch is represented by item 3 in figure T2? (Figure unavailable)
Which of the following can be used to display signal strength on a numeric scale?
What type of circuit controls the amount of voltage from a power supply?
What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
Which of the following is commonly used as a visual indicator?
Which of the following is used together with an inductor to make a tuned circuit?
What is the name of a device that combines several semiconductors and other components into one package?
What is the function of component 2 in Figure T1?
Which of the following is a common use of coaxial cable?
What is the function of a product detector?
What type of receiver is shown in Figure T6? (Figure unavailable)
What is the function of a mixer in a superheterodyne receiver?
What circuit is pictured in Figure T7, if block 1 is a frequency discriminator?
What is the function of block 1 if figure T4 is a simple CW transmitter?
What device takes the output of a low-powered 28 MHz SSB exciter and produces a 222 MHz output signal?
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?
Which of the following circuits combines a speech signal and an RF carrier?
Which of the following devices is most useful for VHF weak-signal communication?
What device increases the low-power output from a handheld transceiver?
Which of the following circuits demodulates FM signals?
Which term describes the ability of a receiver to discriminate between multiple signals?
Where is an RF preamplifier installed?
What can you do if you are told your FM handheld or mobile transceiver is over deviating?
What is meant by fundamental overload in reference to a receiver?
Which of the following may be a cause of radio frequency interference?
What is the most likely cause of interference to a non-cordless telephone from a nearby transmitter?
What is a logical first step when attempting to cure a radio frequency interference problem in a nearby telephone?
What should you do first if someone tells you that your station's transmissions are interfering with their radio or TV reception?
Which of the following may be useful in correcting a radio frequency interference problem?
What should you do if a "Part 15" device in your neighbor's home is causing harmful interference to your amateur station?
What could be happening if another operator reports a variable high-pitched whine on the audio from your mobile transmitter?
What might be the problem if you receive a report that your audio signal through the repeater is distorted or unintelligible?
What is a symptom of RF feedback in a transmitter or transceiver?
What does the acronym "BER" mean when applied to digital communications systems?
What is the primary purpose of a dummy load?
Which of the following instruments can be used to determine if an antenna is resonant at the desired operating frequency?
What, in general terms, is standing wave ratio (SWR)?
What reading on an SWR meter indicates a perfect impedance match between the antenna and the feedline?
What is the approximate SWR value above which the protection circuits in most solidstate transmitters begin to reduce transmitter power?
What does an SWR reading of 4:1 mean?
What happens to power lost in a feedline?
What instrument other than an SWR meter could you use to determine if a feedline and antenna are properly matched?
Which of the following is the most common cause for failure of coaxial cables?
Why should the outer jacket of coaxial cable be resistant to ultraviolet light?
What is a disadvantage of "air core" coaxial cable when compared to foam or solid dielectric types?
Which instrument would you use to measure electric potential or electromotive force?
What is the correct way to connect a voltmeter to a circuit?
How is an ammeter usually connected to a circuit?
Which instrument is used to measure electric current?
What instrument is used to measure resistance?
Which of the following might damage a multimeter?
Which of the following measurements are commonly made using a multimeter?
Which of the following types of solder is best for radio and electronic use?
What is the characteristic appearance of a "cold" solder joint?
What is probably happening when an ohmmeter, connected across a circuit, initially indicates a low resistance and then shows increasing resistance with time?
Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?
Which of the following is a form of amplitude modulation?
What type of modulation is most commonly used for VHF packet radio transmissions?
Which type of voice modulation is most often used for long-distance or weak signal contacts on the VHF and UHF bands?
Which type of modulation is most commonly used for VHF and UHF voice repeaters?
Which of the following types of emission has the narrowest bandwidth?
Which sideband is normally used for 10 meter HF, VHF and UHF single-sideband communications?
What is the primary advantage of single sideband over FM for voice transmissions?
What is the approximate bandwidth of a single sideband voice signal?
What is the approximate bandwidth of a VHF repeater FM phone signal?
What is the typical bandwidth of analog fast-scan TV transmissions on the 70 cm band?
What is the approximate maximum bandwidth required to transmit a CW signal?
Who may be the control operator of a station communicating through an amateur satellite or space station?
How much transmitter power should be used on the uplink frequency of an amateur satellite or space station?
Which of the following can be done using an amateur radio satellite?
Which amateur stations may make contact with an amateur station on the International Space Station using 2 meter and 70 cm band amateur radio frequencies?
What is a satellite beacon?
What can be used to determine the time period during which an amateur satellite or space station can be accessed?
With regard to satellite communications, what is Doppler shift?
What is meant by the statement that a satellite is operating in "mode U/V"?
What causes "spin fading" when referring to satellite signals?
What do the initials LEO tell you about an amateur satellite?
What is a commonly used method of sending signals to and from a digital satellite?
Which of the following methods is used to locate sources of noise interference or jamming?
Which of these items would be useful for a hidden transmitter hunt?
What popular operating activity involves contacting as many stations as possible during a specified period of time?
Which of the following is good procedure when contacting another station in a radio contest?
What is a grid locator?
For what purpose is a temporary "1 by 1" format (letter-number-letter) call sign assigned?
What is the maximum power allowed when transmitting telecommand signals to radio controlled models?
What is required in place of on-air station identification when sending signals to a radio control model using amateur frequencies?
How might you obtain a list of active nodes that use VoIP?
How do you select a specific IRLP node when using a portable transceiver?
What name is given to an amateur radio station that is used to connect other amateur stations to the Internet?
Which of the following is an example of a digital communications method?
What does the term APRS mean?
Which of the following is normally used when sending automatic location reports via amateur radio?
What type of transmission is indicated by the term NTSC?
Which of the following emission modes may be used by a Technician Class operato
What does the abbreviation PSK mean?
What is PSK31?
Which of the following may be included in packet transmissions?
What code is used when sending CW in the amateur bands?
Which of the following can be used to transmit CW in the amateur bands?
What is a "parity" bit?
What is a beam antenna?
Which of the following is true regarding vertical antennas?
Which of the following describes a simple dipole mounted so the conductor is parallel to the Earth's surface?
What is a disadvantage of the "rubber duck" antenna supplied with most handheld radio transceivers?
How would you change a dipole antenna to make it resonant on a higher frequency?
What type of antennas are the quad, Yagi, and dish?
What is a good reason not to use a "rubber duck" antenna inside your car?
What is the approximate length, in inches, of a quarter-wavelength vertical antenna for 146 MHz?
What is the approximate length, in inches, of a 6 meter 1/2-wavelength wire dipole antenna?
In which direction is the radiation strongest from a half-wave dipole antenna in free space?
What is meant by the gain of an antenna?
Why is it important to have a low SWR in an antenna system that uses coaxial cable feedline?
What is the impedance of the most commonly used coaxial cable in typical amateur radio installations?
Why is coaxial cable used more often than any other feedline for amateur radio antenna systems?
What does an antenna tuner do?
What generally happens as the frequency of a signal passing through coaxial cable is increased?
Which of the following connectors is most suitable for frequencies above 400 MHz?
Which of the following is true of PL-259 type coax connectors?
Why should coax connectors exposed to the weather be sealed against water intrusion?
What might cause erratic changes in SWR readings?
What electrical difference exists between the smaller RG-58 and larger RG-8 coaxial cables?
Which of the following types of feedline has the lowest loss at VHF and UHF?
Which is a commonly accepted value for the lowest voltage that can cause a dangerous electric shock?
How does current flowing through the body cause a health hazard?
What is connected to the green wire in a three-wire electrical AC plug?
What is the purpose of a fuse in an electrical circuit?
Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse?
What is a good way to guard against electrical shock at your station?
Which of these precautions should be taken when installing devices for lightning protection in a coaxial cable feedline?
What is one way to recharge a 12-volt lead-acid station battery if the commercial power is out?
What kind of hazard is presented by a conventional 12-volt storage battery?
What can happen if a lead-acid storage battery is charged or discharged too quickly?
Which of the following is good practice when installing ground wires on a tower for lightning protection?
What kind of hazard might exist in a power supply when it is turned off and disconnected?
What safety equipment should always be included in home-built equipment that is powered from 120V AC power circuits?
When should members of a tower work team wear a hard hat and safety glasses?
What is a good precaution to observe before climbing an antenna tower?
Under what circumstances is it safe to climb a tower without a helper or observer?
Which of the following is an important safety precaution to observe when putting up an antenna tower?
What is the purpose of a gin pole?
What is the minimum safe distance from a power line to allow when installing an antenna?
Which of the following is an important safety rule to remember when using a crank-up tower?
What is considered to be a proper grounding method for a tower?
Why should you avoid attaching an antenna to a utility pole?
Which of the following is true concerning grounding conductors used for lightning protection?
Which of the following establishes grounding requirements for an amateur radio tower or antenna?
What type of radiation are VHF and UHF radio signals?
Which of the following frequencies has the lowest Maximum Permissible Exposure limit?
What is the maximum power level that an amateur radio station may use at VHF frequencies before an RF exposure evaluation is required?
What factors affect the RF exposure of people near an amateur station antenna?
Why do exposure limits vary with frequency?
Which of the following is an acceptable method to determine that your station complies with FCC RF exposure regulations?
What could happen if a person accidentally touched your antenna while you were transmitting?
Which of the following actions might amateur operators take to prevent exposure to RF radiation in excess of FCC-supplied limits?
How can you make sure your station stays in compliance with RF safety regulations?
Why is duty cycle one of the factors used to determine safe RF radiation exposure levels?
What is meant by "duty cycle" when referring to RF exposure?