SUBELEMENT T6 - Communications modes and methods - 3 exam questions - 3 groups



T6A - Modulation modes, descriptions and bandwidth (AM, FM, SSB) - 1 exam question

T6A01
What are phone transmissions? A. The use of telephones to set up an amateur radio contact
B. A phone patch between amateur radio and the telephone system
C. Voice transmissions by radio
D. Placing the telephone handset near a radio transceiver's
microphone and speaker to relay a telephone call

T6A02
Which of the following is a form of amplitude modulation?
A. Frequency modulation
B. Phase modulation
C. Single sideband
D. Phase shift keying

T6A03
What name is given to an amateur radio station that is used to connect other amateur stations to the Internet?
A. A gateway
B. A repeater
C. A digipeater
D. A beacon station

T6A04
Which type of voice modulation is most often used for long distance and weak signal contacts on the VHF and UHF bands?
A. FM
B. AM
C. SSB
D. PM

T6A05
Which type of modulation is most commonly used for VHF and UHF voice repeaters?
A. AM
B. SSB
C. PSK
D. FM

T6A06
Which emission type has the narrowest bandwidth?
A. FM voice
B. SSB voice
C. CW
D. Slow-scan TV

T6A07
Which sideband is normally used for VHF and UHF SSB communications?
A. Upper sideband
B. Lower sideband
C. Suppressed sideband
D. Inverted sideband

T6A08
What is the primary advantage of single sideband over FM for voice transmissions?
A. SSB signals are easier to tune in than FM signals
B. SSB signals are less likely to be bothered by noise interference than FM signals.
C. SSB signals use much less bandwidth than FM signals
D. SSB signals have no advantages at all in comparison to other modes.

T6A09
What is the approximate bandwidth of a single-sideband voice signal?
A. 1 kHz
B. 2 kHz
C. Between 3 and 6 kHz
D. Between 2 and 3 kHz

T6A10
What is the approximate bandwidth of a frequency-modulated voice signal?
A. Less than 500 Hz
B. About 150 kHz
C. Between 5 and 15 kHz
D. More than 30 kHz

T6A11
What is the normal bandwidth required for a conventional fast-scan TV transmission using combined video and audio on the 70-centimeter band?
A. More than 10 MHz
B. About 6 MHz
C. About 3 MHz
D. About 1 MHz


T6B - Voice communications, EchoLink and IRLP - 1 exam question

T6B01
How is information transmitted between stations using Echolink?
A. APRS
B. PSK31
C. Internet
D. Atmospheric ducting

T6B02
What does the abbreviation IRLP mean?
A. Internet Radio Linking Project
B. Internet Relay Language Protocol
C. International Repeater Linking Project
D. International Radio Linking Project T6B03
Who may operate on the Echolink system?
A. Only club stations
B. Any licensed amateur radio operator
C. Technician class licensed amateur radio operators only
D. Any person, licensed or not, who is registered with the Echolink system

T6B04
What technology do Echolink and IRLP have in common?
A. Voice over Internet protocol
B. Ionospheric propagation
C. AC power lines
D. PSK31

T6B05
What method is used to transfer data by IRLP?
A. VHF Packet radio
B. PSK31
C. Voice over Internet protocol
D. None of these answers are correct

T6B06
What does the term IRLP describe?
A. A method of encrypting data
B. A method of linking between two or more amateur stations using the Internet
C. A low powered radio using infra-red frequencies
D. An international logging program.

T6B07
Which one of the following allows computer-to-radio linking for voice transmission?
A. Grid modulation
B. EchoLink
C. AMTOR
D. Multiplex T6B08
What are you listening to if you hear a brief tone and then a station from Russia calling CQ on a 2-meter repeater?
A. An ionospheric band opening on VHF
B. A prohibited transmission
C. An Internet linked DX station
D. None of these answers are correct

T6B10
Where might you find a list of active nodes using VoIP?
A. The FCC Rulebook
B. From your local emergency coordinator
C. A repeater directory or the Internet
D. The local repeater frequency coordinator

T6B11
When using a portable transceiver how do you select a specific IRLP node?
A. Choose a specific CTCSS tone
B. Choose the correct DSC tone
C. Access the repeater autopatch
D. Use the keypad to transmit the IRLP node numbers


T6C - Non-voice communications - image communications, data, CW, packet, PSK31, Morse code techniques, Q signals - 1 exam question

T6C01
Which of the following is an example of a digital communications method?
A. Single sideband voice
B. Amateur television
C. FM voice
D. Packet radio

T6C02
What does the term APRS mean?
A. Automatic Position Reporting System
B. Associated Public Radio Station
C. Auto Planning Radio Set-up
D. Advanced Polar Radio System

T6C03
What item is required along with your normal radio for sending automatic location reports?
A. A connection to the vehicle speedometer
B. A connection to a WWV receiver
C. A connection to a broadcast FM sub-carrier receiver
D. A global positioning system receiver

T6C04
What type of transmission is indicated by the term NTSC?
A. A Normal Transmission mode in Static Circuit
B. A special mode for earth satellite uplink
C. A standard fast scan color television signal
D. A frame compression scheme for TV signal

T6C05
What emission mode may be used by a Technician class operator in the 219 - 220 MHz frequency range?
A. Slow-scan television
B. Point-to-point digital message forwarding
C. FM voice
D. Fast-scan television

T6C06
What does the abbreviation PSK mean?
A. Pulse Shift Keying
B. Phase Shift Keying
C. Packet Short Keying
D. Phased Slide Keying

T6C07
What is PSK31?
A. A high-rate data transmission mode used to transmit files
B. A method of reducing noise interference to FM signals
C. A type of television signal
D. A low-rate data transmission mode that works well in noisy conditions

T6C08
What sending speed is recommended when using Morse code?
A. Only speeds below five WPM
B. The highest speed your keyer will operate
C. Any speed at which you can reliably receive
D. The highest speed at which you can control the keyer T6C09
What is a practical reason for being able to copy CW when using repeaters?
A. To send and receive messages others cannot overhear
B. To conform with FCC licensing requirements
C. To decode packet radio transmissions
D. To recognize a repeater ID sent in Morse code

T6C10
What is the "Q" signal used to indicate that you are receiving interference from other stations?
A. QRM
B. QRN
C. QTH
D. QSB

T6C11
What is the "Q" signal used to indicate that you are changing frequency?
A. QRU
B. QSY
C. QSL
D. QRZ

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