M2 B3

Question 1

Which of the following is not one of the three distinct elements that work together to make satellite communication (SATCOM) possible?

Answer 1

Payload segment

Question 2

which of the following is not a function of the (satellite communication) SATCOM control segment?

Answer 2

Ground control

Question 3

Which term describes the longest distance across an elliptical orbit?

Answer 3

Major axis

Question 4

What is the inclination angle of a polar orbit?

Answer 4

90*

Question 5

Which are the two types of communications satellites?

Answer 5

Active and passive

Question 6

Which satellite reflects signals transmitted toward it?

Answer 6

Passive

Question 7

Which of the following satellite look angle methods is provided by (satellite communication SATCOM planners?

Answer 7

Satellite access authorization

Question 8

Which satellite access technique is being used when all channels are pooled and used by any station according to its instantaneous traffic load?

Answer 8

Demand assigned multiple access (DAMA).

Question 9

Conflicts regarding Defense Satellite Communications System (DSCS) ground mobile forces

Answer 9

Joint Staff

Question 10

One of the functions of the telecommunication certification office is to

Answer 10

ensure the user agency is prepared to pay for the service

Question 11

Telecommunications service orders are issued by the

Answer 11

Defense Information Systems Agency (DISA).

Question 12

Astronomical time is based on

Answer 12

the apparent motion of the sun in the sky

Question 13

What time scale gives us a universally agreed to standard time scale with the stability and accuracy of atomic time and synchronous operation with the earth’s motion about the sun we can depend on?

Answer 13

Coordinated universal time

Question 14

What two factors cause a quartz oscillator’s resonant frequency to drift?

Answer 14

Temperature and aging

Question 15

The operation of the atomic clock is based on the phenomenon that

Answer 15

atoms release energy at a particular resonant frequency

Question 16

To determine the number of hours coordinated universal time (UTC) differs from your local time, you must determine the number of time zones between your location and the location of the zero

Answer 16

meridian

Question 17

Coordinated universal time (UTC) is based on what kind of clock system?

Answer 17

24-hour

Question 18

A number of organizations can maintain accurate time-of-day clocks by referencing a standard time interval of one

Answer 18

second

Question 19

The agency responsible for coordinated universal time (UTC) is the

Answer 19

International Bureau of Weights and Measures (BIPM)

Question 20

What is multiplexing?

Answer 20

Combining multiple information channels onto a common transmission medium

Question 21

What specifically does wavelength division multiplexing assign each incoming optical signal?

Answer 21

Frequency of light

Question 22

Which multiplexing division technique samples each low speed channel in sequence to interleave bits or characters and then transmit them at high speed?

Answer 22

Time

Question 23

Which of the following relies on the transmitter to send multiple copies of the same message to the distant end using a predetermined algorithm?

Answer 23

Forward error correction

Question 24

Which SATCOM system module is used to produce the final transmit frequency?

Answer 24

Up converter

Question 25

Which type of power amplifier uses semiconductor transistors designed for microwave and higher frequency RF operation?

Answer 25

Solid state

Question 26

Which module is the first step of the receive signal path?

Answer 26

Low noise amplifier

Question 27

Which module strips away the intelligence from the Intermediate frequency?

Answer 27

Demodulator

Question 28

When establishing a communication link with a satellite the required sequence of events is

Answer 28

orbit prediction, antenna pointing, satellite acquisition, and satellite tracking

Question 29

Which tracking method requires no input from a satellite?

Answer 29

Programmed track.

Question 30

What signal originating from the satellite do we use to acquire and track the satellite?

Answer 30

Beacon

Question 31

Which type of diversity do you have when the same frequency radiates simultaneously in two different planes?

Answer 31

Polarization

Question 32

Which type of diversity requires two antennas, two receivers, and two transmitters?

Answer 32

Polarization

Question 33

What is the tropo/satellite support radio frequency range?

Answer 33

14.4 to 15.25 GHz

Question 34

What are the Air Force Satellite Control Network (AFSCN) command and control nodes?

Answer 34

Environmental Satellite Operations Center at Schriever AFB, CO, and National Oceanographic and Atmospheric Administration (NOAA) Satellite Operations Control Center at Suitland, MD

Question 35

The MARK IVB antennas can be located up to how many feet away from the processing area?

Answer 35

1500

Question 36

Which mission is the highest priority of the Defense Support Program (DSP)?

Answer 36

North American warning

Question 37

Which set of equipment represents the satellite readout station equipment group?

Answer 37

Radio frequency set, transmit/receiver set, and digital equipment set

Question 38

What is the number of Global Positioning System (GPS) orbital planes?

Answer 38

6

Question 39

Which military strategic and tactical relay (MILSTAR) capability is very different from previous military satellite communications (MILSATCOM) and commercial satellite communications systems?

Answer 39

Crosslinking

Question 40

Which element of the military strategic and tactical relay (MILSTAR) mission allocates communication resources?

Answer 40

Planning

Question 41

The military strategic and tactical relay (MILSTAR) satellite sends downlink communications transmissions at

Answer 41

ultrahigh frequency (UHF) and super-high frequency (SHF)

Question 42

Which military strategic and tactical relay (MILSTAR) antenna provides high gain, selective coverage of any ground station visible on the earth’s surface within its own footprint?

Answer 42

Spot beam

Question 43

Which satellite system provides Global Broadcast Services (GBS)?

Answer 43

Ultrahigh frequency (UHF) follow-on

Question 44

How many ultrahigh frequencies (UHF) channel are available for each UHF Follow-on satellite?

Answer 44

39

Question 45

When considering the factor of service area for commercial satellite services, which description about Ku-band service is true?

Answer 45

Not worldwide, located primarily over land masses and highly populated areas

Question 46

What services are not included in INMARSAT mobile satellite services (MSS)?

Answer 46

Iridium

Question 47

Which commercial satellite communication system can offer true pole-to-pole global coverage?

Answer 47

Iridium

Question 48

Where is the Inmarsat headquarters located?

Answer 48

London, England

Question 49

Which type of communications is not normally provided through commercial wideband services?

Answer 49

Handheld satellite phone communications

Question 50

Which satellite company is specifically designed to interface with all current X-band terminals?

Answer 50

XTAR