Ham Radio T8 - Modulation Modes (15 ques)

Which of the following are provided by satellite tracking programs?

• Maps showing the real-time position of the satellite track over the earth
• The time, azimuth, and elevation of the start, maximum altitude, and end of a pass
• The apparent frequency of the satellite transmission, including effects of Doppler shift
• All of these choices are correct

What is the impact of using too much effective radiated power on a satellite uplink?

• Possibility of commanding the satellite to an improper mode
• Blocking access by other users
• Overloading the satellite batteries
• Possibility of rebooting the satellite control computer

What is meant by the statement that a satellite is operating in mode U/V?

• The satellite uplink is in the 15 meter band and the downlink is in the 10 meter band
• The satellite uplink is in the 70 centimeter band and the downlink is in the 2 meter band
• The satellite operates using ultraviolet frequencies
• The satellite frequencies are usually variable

Which of the following is an application of APRS (Automatic Packet Reporting System)?

• Providing real-time tactical digital communications in conjunction with a map showing the locations of stations
• Showing automatically the number of packets transmitted via PACTOR during a specific time interval
• Providing voice over internet connection between repeaters
• Providing information on the number of stations signed into a repeater

What is an electronic keyer?

• A device for switching antennas from transmit to receive
• A device for voice activated switching from receive to transmit
• A device that assists in manual sending of Morse code
• An interlock to prevent unauthorized use of a radio

What operating activity involves contacting as many stations as possible during a specified period?

• Contesting
• Net operations
• Public service events
• Simulated emergency exercises

What type of modulation is most commonly used for VHF packet radio transmissions?

• FM
• SSB
• AM
• PSK

Which type of voice mode is most often used for long-distance (weak signal) contacts on the VHF and UHF bands?

• FM
• DRM
• SSB
• PM

Which sideband is normally used for 10 meter HF, VHF, and UHF single-sideband communications?

• Upper sideband
• Lower sideband
• Suppressed sideband
• Inverted sideband

What must be done before you may use the EchoLink system to communicate using a repeater?

• You must complete the required EchoLink training
• You must have purchased a license to use the EchoLink software
• You must be sponsored by a current EchoLink user
• You must register your call sign and provide proof of license