Checkpoint: T8B — HAM Trainer

T8B01 What telemetry information is typically transmitted by satellite beacons?

A The signal strength of received signals B Time of day accurate to plus or minus 1/10 second C Health and status of the satellite D All these choices are correct

T8B02 What is the impact of using excessive effective radiated power on a satellite uplink?

A Possibility of commanding the satellite to an improper mode B Blocking access by other users C Overloading the satellite batteries D Possibility of rebooting the satellite control computer

T8B03 Which of the following are provided by satellite tracking programs?

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

T8B04 What mode of transmission is commonly used by amateur radio satellites?

A SSB B FM C CW/data D All these choices are correct

T8B05 What is a satellite beacon?

A The primary transmit antenna on the satellite B An indicator light that shows where to point your antenna C A reflective surface on the satellite D A transmission from a satellite that contains status information

T8B06 Which of the following are inputs to a satellite tracking program?

A The satellite transmitted power B The Keplerian elements C The last observed time of zero Doppler shift D All these choices are correct

T8B07 What is Doppler shift in reference to satellite communications?

A A change in the satellite orbit B A mode where the satellite receives signals on one band and transmits on another C An observed change in signal frequency caused by relative motion between the satellite and Earth station D A special digital communications mode for some satellites

T8B08 What does it mean if a satellite is operating in U/V mode?

A The satellite uplink is in the 15-meter band and the downlink is in the 10-meter band B The satellite uplink is in the 70-centimeter band and the downlink is in the 2-meter band C The satellite operates using ultraviolet frequencies D The satellite frequencies are usually variable

T8B09 What causes spin fading of satellite signals?

A Circular polarized noise interference radiated from the sun B Rotation of the satellite and its antennas C Doppler shift of the received signal D Interfering signals within the satellite uplink band

T8B10 What does the term LEO mean in reference to communication satellites?

A Low Energy Orbit, which conserves battery power B Low Elevation Orbit, which appears close to the horizon from the earth station C Low Equilibrium Orbit, which has a slightly unstable period D Low Earth Orbit, which has a period of around 100 minutes

T8B11 Who is permitted to receive telemetry from an amateur radio satellite?

A Anyone B Only the satellite control operator C Only the control operator or a licensed radio amateur who has received the encryption key from the control operator D Only a licensed radio amateur who has received the encryption key from AMSAT

T8B12 Which of the following is a way to determine whether your satellite uplink power into a linear transponder satellite is neither too low nor too high?

A Check your signal strength report in the telemetry data B Listen for distortion on your downlink signal C Your signal strength on the downlink should be about the same as the beacon D Compare your signal to others on the downlink using an internet SDR receiver