Topic T8B Quick Review Audio


What telemetry information is typically transmitted by satellite beacons?

  1. The signal strength of received signals
  2. Time of day accurate to plus or minus 1/10 second
  3. Health and status of the satellite
  4. All of these choices are correct


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

  1. Possibility of commanding the satellite to an improper mode
  2. Blocking access by other users
  3. Overloading the satellite batteries
  4. Possibility of rebooting the satellite control computer


Which of the following are provided by satellite tracking programs?

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


What mode of transmission is commonly used by amateur radio satellites?

  1. SSB
  2. FM
  3. CW/data
  4. All of these choices are correct


What is a satellite beacon?

  1. The primary transmit antenna on the satellite
  2. An indicator light that shows where to point your antenna
  3. A reflective surface on the satellite
  4. A transmission from a satellite that contains status information


Which of the following are inputs to a satellite tracking program?

  1. The weight of the satellite
  2. The Keplerian elements
  3. The last observed time of zero Doppler shift
  4. All of these choices are correct


With regard to satellite communications, what is Doppler shift?

  1. A change in the satellite orbit
  2. A mode where the satellite receives signals on one band and transmits on another
  3. An observed change in signal frequency caused by relative motion between the satellite and the earth station
  4. A special digital communications mode for some satellites


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

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


What causes spin fading of satellite signals?

  1. Circular polarized noise interference radiated from the sun
  2. Rotation of the satellite and its antennas
  3. Doppler shift of the received signal
  4. Interfering signals within the satellite uplink band


What do the initials LEO tell you about an amateur satellite?

  1. The satellite battery is in Low Energy Operation mode
  2. The satellite is performing a Lunar Ejection Orbit maneuver
  3. The satellite is in a Low Earth Orbit
  4. The satellite uses Light Emitting Optics


Who may receive telemetry from a space station?

  1. Anyone who can receive the telemetry signal
  2. A licensed radio amateur with a transmitter equipped for interrogating the satellite
  3. A licensed radio amateur who has been certified by the protocol developer
  4. A licensed radio amateur who has registered for an access code from AMSAT


Which of the following is a good way to judge whether your uplink power is neither too low nor too high?

  1. Check your signal strength report in the telemetry data
  2. Listen for distortion on your downlink signal
  3. Your signal strength on the downlink should be about the same as the beacon
  4. All of these choices are correct