3D153 CDCs
Volume 3 URE
- 1.When using space diversity, the AN/TRC 170 receive antenna spacing should be a minium of
- A.
10 wave lenghts
- B.
25 wavelengths
- C.
50 wavelengths
- D.
100 wavelengths
- 2.Which type of diversity requires 2 antennas, 2 receivers, and 2 transmitters?
- A.
Polarization
- B.
Crossband
- C.
Frequency
- D.
Space
- 3.In an AN/TRC 170 terminal, the quantity of digital group multiplexer units supplied and their appilication are
- A.
Different in the V2 and V3
- B.
Identical in the V2 and V3
- C.
Dependent on the mission and number of channels
- D.
Dependent on the deployment of the technical control
- 4.The MD-1026 digital data modem can interface up to four groups of
- A.
Balanced NRZ signals
- B.
Conditioned diphase signals
- C.
Unbalanced NRZ signals
- D.
Isochronous signals
- 5.Which type of encryption device does full-duplex encryption of AN/TRC 170's group or super group 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.Digital voice order wire traffic that originates at the AN/TRC 170's voice orderwire control unit is encrypted bythe
- 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
- 7.Which jack field in the AN/TRC-170's baseband patch provides timing and data connections?
- A.
Middle
- B.
Center
- C.
Upper
- D.
Lower
- 8.The tropospheric scatter modem posses mission traffic at data rates of 128 through 4096 Kbps in the
- A.
512 Kbps data rate family
- B.
576 Kbps data rate family
- C.
1024 Kbps data rate family
- D.
1152 Kbps data rate family
- 9.Which unit in the AN/TRC 170 terminal contains the rubidium standard?
- A.
Electrical frequency synthesizer
- B.
Frequency subsytem unit
- C.
Tropospheric scatter modem
- D.
Transmitter-ampilifier converter
- 10.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.The TSSR 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.The maximum distance a TSSR can operate with a 2-foot antenna is
- A.
10 miles
- B.
25 miles
- C.
100 miles
- D.
250 miles
- 13.In the TSSR's baseband assembly, a 1 VPP input signal results in how much frequency deviation in the transmitter?
- A.
+/- 4MHz
- B.
Les than +/- 4MHz
- C.
More than +/- 4MHz
- D.
No signal deviation
- 14.What is the IF of the TSSR?
- A.
70 MHz with a 10 MHz banpass
- B.
70 MHz with a 20 MHz bandpass
- C.
700 MHz with a 10 MHz banpass
- D.
700 MHzwith a 20 MHz bandpass
- 15.In the TSSR assembly what permits the transmitter and receiver to be connected to the same antenna?
- A.
Circulator
- B.
Combiner
- C.
Coupler
- D.
Hybrid
- 16.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.What is th einclination angle of a polar orbit?
- A.
0 degrees
- B.
45 degrees
- C.
90 degrees
- D.
180 degrees
- 18.What are the two types of communication satellites?
- A.
Active and passive
- B.
Active and real-time
- C.
Delay and passive
- D.
Delay and real-time
- 19.An advantage of passive satellites is that they
- A.
Have a larger transmitter power
- B.
Have more sensitive equipment
- C.
Operate as repeater staions in space
- D.
Operate over a wider-frequency range
- 20.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
- 21.Which satellites reflects signal transmitted toward it?
- A.
Active
- B.
Delay
- C.
Passive
- D.
Real-time
- 22.What satellite acces technique was the first mutiple acces method developed?
- A.
Code division mutiple acces
- B.
Time division mutiple acces
- C.
Frequency mutiple acces
- D.
Demand assigned mutiple acces
- 23.What satellite access technique is being used when all channels are pooled and used by any station, according to its instantaneous traffic load?
- A.
CDMA
- B.
TDMA
- C.
DAMA
- D.
FDMA
- 24.When computing satellite look angles, ground distance on eath's surface is expressed in
- A.
Degrees
- B.
Seconds
- C.
Minutes
- D.
Nautical miles
- 25.10 of an arc on the Earth's surface equals
- A.
One nautical mile
- B.
69 statute miles
- C.
One statute mile
- D.
69 nautical miles
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