3D1X3 CDC Volume 3 Ure
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- 1.(401) When using space diversity, the AN/TRC-170 receive antenna spacing should be a minimum of
- A.
10 wavelengths apart.
- B.
25 wavelengths apart.
- C.
50 wavelengths apart.
- D.
100 wavelengths apart.
- 2.(401) Which type of diversity requires two antennas, two receivers, and two transmitters?
- A.
Polarization.
- B.
Crossband.
- C.
Frequency.
- D.
Space.
- 3.(401) In an AN/TRC-170 terminal, the quantity of digital group multiplexer units supplied and their application are
- A.
Different in the V2 and V3 systems.
- B.
Identical in the V2 and V3 systems.
- C.
Dependent on the mission and number of channels.
- D.
Dependent on the deployment of the technical control.
- 4.(401) The MD-1026 digital data modem can interface up to four groups of
- A.
Balanced non-return-to-zero (NRZ) signals.
- B.
Conditioned diphase signals.
- C.
Unbalanced NRZ signals.
- D.
Isochronous signals.
- 5.(401) Which type of encryption device does full-duplex encryption of AN/TRC-170's groups or supergroup mission traffic?
- A.
KY-68 digital secure voice terminal/phone.
- B.
KY-58 VINSON.
- C.
KG-84 dedicated loop encryption device.
- D.
KG-81 trunk encryption device.
- 6.(401) Digital voice orderwire traffic that originates at the AN/TRC-170's voice orderwire control unit is encrypted by the
- A.
KY-68 digital secure voice terminal/phone.
- B.
KY-58 VINSON encryption device.
- C.
KG-84 dedicated loop encryption device.
- D.
KG-81 trunk encryption device.
- 7.(401) Which jack field in the AN/TRC-170's baseband patch panel provides timing and data connections?
- A.
Middle.
- B.
Center.
- C.
Upper.
- D.
Lower.
- 8.(401) The tropospheric scatter modem processes mission traffic at data rates of 128 through 4,096 Kbps in the
- A.
512 Kbps data rate family.
- B.
576 Kbps data rate family.
- C.
1,024 Kbps data rate family.
- D.
1,152 Kbps data rate family.
- 9.(401) Which unit in the AN/TRC-170 terminal contains the rubidium standard?
- A.
Electrical frequency synthesizer.
- B.
Frequency subsystem unit.
- C.
Tropospheric scatter modem.
- D.
Transmitter-amplifier converter.
- 10.(401) The quick reaction antenna for the V3 AN/TRC-170 terminal uses
- A.
Two 6-foot-diameter, linearly dual-polarized antennas.
- B.
Four 6-foot-diameter, linearly dual-polarized antennas.
- C.
Two 9.5-foot-diameter, linearly dual-polarized antennas.
- D.
Four 9.5-foot-diameter, linearly dual-polarized antennas.
- 11.(402) The Tropo/Satellite Support Radio frequency coverage extends from
- A.
4.4 to 5.25 GHz.
- B.
7.25 to 8.4 GHz.
- C.
14.4 to 15.25 GHz.
- D.
17.25 to 18.4 GHz.
- 12.(402) The maximum distance a Tropo/Satellite Support Radio can operate with the 2-foot antenna is
- A.
10 miles.
- B.
25 miles.
- C.
100 miles.
- D.
250 miles.
- 13.(402) In the Tropo/Satellite Support Radio's baseband assembly, a 1-volt peak-to-peak input signal results in how much frequency deviation in the transmitter?
- A.
+/- 4 MHz.
- B.
Less than +/- 4 MHz.
- C.
More than +/- 4 MHz.
- D.
No signal deviation.
- 14.(402) In the Tropo/Satellite Support Radio frequency assembly, what permits the transmitter and receiver to be connected to the same antenna?
- A.
Circulator.
- B.
Combiner.
- C.
Coupler.
- D.
Hybrid.
- 15.(402) What is the intermediate frequency of the Tropo/Satellite Support Radio?
- A.
70 MHz with a 10 MHz bandpass.
- B.
70 MHz with a 20 MHz bandpass.
- C.
700 MHz with a 10 MHz bandpass.
- D.
700 MHz with a 20 MHz bandpass.
- 16.(403) The closest point of orbit that a satellite comes to the Earth is called the
- A.
Apogee.
- B.
Perigee.
- C.
Major axis.
- D.
Minor axis.
- 17.(403) What is the inclination angle of a polar orbit?
- A.
0 degrees.
- B.
45 degrees.
- C.
90 degrees.
- D.
180 degrees
- 18.(404) What are the two types of communications satellites?
- A.
Active and passive.
- B.
Active and real-time.
- C.
Delay and passive.
- D.
Delay and real-time.
- 19.(404) Which satellite reflects signals transmitted toward it?
- A.
Active.
- B.
Delay.
- C.
Passive.
- D.
Real-time.
- 20.(404) An advantage of passive satellites is that they
- A.
Have a larger transmitter power.
- B.
Have more sensitive equipment.
- C.
Operate as repeater stations in space.
- D.
Operate over a wider-frequency range.
- 21.(404) What is the time delay of a real-time satellite?
- A.
0.1 seconds.
- B.
0.6 seconds.
- C.
1.0 seconds.
- D.
6.0 seconds.
- 22.(405) What satellite access technique was the first multiple access method developed?
- A.
Code division multiple access (CDMA).
- B.
Time division multiple access (TDMA).
- C.
Demand assigned multiple access (DAMA).
- D.
Frequency division multiple access (FDMA).
- 23.(405) What satellite access technique is being used when all channels are pooled and used by any station, according to its instantaneous traffic load?
- A.
Code division multiple access (CDMA).
- B.
Time division multiple access (TDMA).
- C.
Demand assigned multiple access (DAMA).
- D.
Frequency division multiple access (FDMA).
- 24.(406) When computing satellite look angles, ground distance on the earth's surface is expressed in
- A.
Degrees.
- B.
Seconds.
- C.
Minutes.
- D.
Nautical miles.
- 25.(406) One degree of arc on the Earth's surface equals
- A.
One statute mile.
- B.
One nautical mile.
- C.
69 statute miles.
- D.
69 nautical miles.
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