Z3D153 Vol3 Unit 2
Multichannel Satellite Principles.
- 1.What is multiplexing?
- A.
Transmitting one signal over multiple transmission paths.
- B.
Transmitting one signal multiple times over a single transmission path.
- C.
Combining multiple information channels onto a common transmission medium.
- D.
Combining multiple signals for transmission over separate, individual transmission paths.
- 2.What specifically does wavelength division multiplexing assign each incoming optical signal?
- A.
Pseudorandom code.
- B.
Frequency of light.
- C.
Radio frequency.
- D.
Time slot.
- 3.Which multiplexing division technique samples each low speed channel in sequence to interleave bits or characters and then transmit them at high speed?
- A.
Wavelength.
- B.
Frequency.
- C.
Code.
- D.
Time.
- 4.Which of the following relies on the transmitter to send multiple copies of the same message to the distant end using a predetermined algorithm?
- A.
Controlled diphase.
- B.
Non-return to zero.
- C.
Forward error correction.
- D.
Quadrature phase shift keying (QPSK).
- 5.Which SATCOM system module is used to produce the final transmit frequency?
- A.
Up converter.
- B.
Modulator.
- C.
Amplifier.
- D.
Antenna.
- 6.Which type of power amplifier uses semiconductor transistors designed for microwave and higher frequency RF operation?
- A.
Klystron.
- B.
Solid state.
- C.
Traveling wave tube amplifier.
- D.
Metal oxide field-effect transistor (MOSFET).
- 7.Which module is the first step of the receive signal path?
- A.
Low noise amplifier.
- B.
Down converter.
- C.
Up converter.
- D.
Demodulator.
- 8.Which module strips away the intelligence from the Intermediate frequency?
- A.
Low noise amplifier.
- B.
Down converter.
- C.
Up converter.
- D.
Demodulator.
- 9.When establishing a communication link with a satellite the required sequence of events is?
- A.
Frequency acquisition, space acquisition, antenna pointing, and satellite tracking.
- B.
Satellite acquisition, satellite tracking, power correction, and antenna pointing.
- C.
Orbit prediction, antenna pointing, satellite acquisition, and satellite tracking.
- D.
Orbit prediction, space acquisition, and frequency acquisition
- 10.Which tracking method requires no input from a satellite?
- A.
Programmed track.
- B.
Automatic track.
- C.
Pseudoconscan.
- D.
Step track.
- 11.What signal originating from the satellite do we use to acquire and track the satellite?
- A.
Beacon.
- B.
Telemetry.
- C.
Ephemeris.
- D.
Communication.
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