Term
When using space diversity, the AN/TRC–170 receive antenna spacing should be a minimum
Of |
|
Definition
|
|
Term
| Which type of diversity requires two antennas, two receivers, and two transmitters? |
|
Definition
|
|
Term
In an AN/TRC–170 terminal, the quantity of digital group multiplexer units supplied and
their application are |
|
Definition
| identical in the V2 and V3 systems |
|
|
Term
| The MD–1026 digital data modem can interface up to four groups of |
|
Definition
| conditioned diphase signals |
|
|
Term
Which type of encryption device does full-duplex encryption of AN/TRC–170’s group or
supergroup mission traffic? |
|
Definition
| KG–81 trunk encryption device |
|
|
Term
Digital voice orderwire traffic that originates at the AN/TRC–170’s voice orderwire control
unit is encrypted by the |
|
Definition
| KY–58 VINSON encryption device |
|
|
Term
Which jack field in the AN/TRC–170’s baseband patch panel provides timing and data
connections? |
|
Definition
|
|
Term
The tropospheric scatter modem processes mission traffic at data rates of 128 through 4,096
Kbps in the |
|
Definition
| 512 Kbps data rate family |
|
|
Term
| Which unit in the AN/TRC–170 terminal contains the rubidium standard? |
|
Definition
| Tropospheric scatter modem |
|
|
Term
| The quick reaction antenna for the V3 AN/TRC–170 terminal uses |
|
Definition
| two 6-foot-diameter, linearly dual-polarized antennas. |
|
|
Term
| The Tropo/Satellite Support Radio frequency coverage extends from |
|
Definition
|
|
Term
The maximum distance a Tropo/Satellite Support Radio can operate with the 2-foot antenna
Is |
|
Definition
|
|
Term
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? |
|
Definition
|
|
Term
In the Tropo/Satellite Support Radio frequency assembly, what permits the transmitter and
receiver to be connected to the same antenna? |
|
Definition
|
|
Term
| What is the intermediate frequency of the Tropo/Satellite Support Radio? |
|
Definition
| 70 MHz with a 20 MHz bandpass |
|
|
Term
| The closest point of orbit that a satellite comes to the Earth is called the |
|
Definition
|
|
Term
| What is the inclination angle of a polar orbit? |
|
Definition
|
|
Term
| What are the two types of communications satellites? |
|
Definition
|
|
Term
| Which satellite reflects signals transmitted toward it? |
|
Definition
|
|
Term
| An advantage of passive satellites is that they |
|
Definition
| operate over a wider-frequency range |
|
|
Term
| What is the time delay of a real-time satellite? |
|
Definition
|
|
Term
| What satellite access technique was the first multiple access method developed? |
|
Definition
| Frequency division multiple access (FDMA). |
|
|
Term
What satellite access technique is being used when all channels are pooled and used by any
station, according to its instantaneous traffic load? |
|
Definition
| Demand assigned multiple access (DAMA). |
|
|
Term
| When computing satellite look angles, ground distance on the earth’s surface is expressed in |
|
Definition
|
|
Term
| One degree of arc on the Earth’s surface equals |
|
Definition
|
|
Term
|
Definition
| the apparent motion of the sun in the sky |
|
|
Term
| An atomic time scale is based on the frequency of which type of oscillator? |
|
Definition
|
|
Term
| On what kind of clock system is coordinated universal time based? |
|
Definition
|
|
Term
| The international agency responsible for coordinated universal time (UTC) is the |
|
Definition
| International Bureau of Weights and Measures |
|
|
Term
Uploading satellite control data, tracking ballistic missiles, and predicting satellite tracking
coordinates are examples of missions where all parties involved must have |
|
Definition
|
|
Term
| What two factors cause a quartz oscillator’s resonant frequency to drift? |
|
Definition
|
|
Term
| The operation of the atomic clock is based on the phenomenon that |
|
Definition
| atoms release energy at a particular resonant frequency |
|
|
Term
| Which type of modems transmits RF signals over coaxial cable? |
|
Definition
|
|
Term
|
Definition
| Combining multiple signals for transmission over a single transmission path |
|
|
Term
What technique of multiplexing samples each low speed channel in sequence to interleave
bits or characters and then transmit them at high speed? |
|
Definition
|
|
Term
| Wavelength division multiplexing assigns each incoming optical signal to a specific |
|
Definition
|
|
Term
| What comprises a telemetry data stream? |
|
Definition
| Mission data and mission satellite health and status data |
|
|
Term
On a satellite, position and orientation control is especially critical for what type of
antenna? |
|
Definition
|
|
Term
| The function of the command and control (C2) segment of the space systems is to |
|
Definition
| maintain the satellite health and status and recover the payload and health and status data. |
|
|
Term
What type of command is sent to the satellite by the space systems mission control complex
and contains embedded timing that specifies the time the satellite will execute the command? |
|
Definition
|
|
Term
| What is the purpose of the space system user segment? |
|
Definition
| Receive, process, use, or distribute mission data as required by a program’s taskings. |
|
|
Term
The two major subdivisions of the Defense Meteorological Satellite Program user segment
Are |
|
Definition
Air Force Weather Agency and the Fleet Numerical Meteorology Oceanography Center and
tactical terminals |
|
|
Term
Which early warning center receives Defense Support Program warning data from the 460th
Space Wing units? |
|
Definition
| North American Aerospace Defense Command |
|
|
Term
For an operational mission, the purpose of the global positioning system user segment is to
enable users to |
|
Definition
| passively receive satellite broadcast position, velocity, and time data |
|
|
Term
What system supports the National Command Authority and provides all-service (Army,
Navy and Air Force) communication for interoperable command, control and communications
(C3) at all levels of conflict? |
|
Definition
|
|
Term
What sequence of events you must follow when establishing a communication link with a
satellite? |
|
Definition
| Orbit prediction, antenna pointing, satellite acquisition, and satellite tracking |
|
|
Term
|
Definition
. the data transmitted by the satellite concerning on-board status and is separate from the
communications components |
|
|
Term
| Information contained in the ephemeris data pertain to the |
|
Definition
| predicted satellite orbit |
|
|
Term
| Which tracking method requires no input from a satellite? |
|
Definition
|
|
Term
| Automatic tracking systems are superior to programmed tracking systems because they |
|
Definition
| track only signals received from the satellite |
|
|
Term
| What signals originating from the satellite do we use to acquire and track the satellite? |
|
Definition
|
|
Term
The intermediate frequencies/levels used by Defense Satellite Communications System
(DSCS) earth terminals are 70 MHz at |
|
Definition
| –10 dBm and 700 MHz @ –13 dBm. |
|
|
Term
| How are the high power amplifiers (HPA) cooled in an AN/GSC–52 earth terminal? |
|
Definition
|
|
Term
| The downlink frequency range of the Defense Satellite Communications System (DSCS) is |
|
Definition
|
|
Term
In the AN/GSC–52 earth terminal, the downconverter normally dedicated for tracking is
downconverter |
|
Definition
| 1 in Downconverter Rack 1 |
|
|
Term
What information is used for satellite tracking on an AN/GSC–52 earth terminal operating
in the memory track mode? |
|
Definition
|
|
Term
Which of the following component is not used to control the AN/GSC–52 earth terminal?
a. Remote terminal processor (RTP). |
|
Definition
|
|
Term
| Which feedhorns are located in the AN/GSC–52 earth terminal feed assembly? |
|
Definition
| Four tracking feedhorns and one communication feedhorn. |
|
|
Term
In the AN/GSC–52 earth terminal’s tracking system, what converts the azimuth/elevation
(AZ/EL) velocity commands from the antenna control unit into drive power outputs to move the
antenna? |
|
Definition
|
|
Term
| How are the high power amplifiers normally configured in the AN/GSC–52 earth terminal? |
|
Definition
| Three active online with one in standby mode. |
|
|
Term
In the event of a downconverter failure in the AN/GSC–52 earth terminal, the
downconverter |
|
Definition
| switch assembly (under TS-A control) automatically places a spare online. |
|
|
Term
In the AN/GSC–52, the upconverter or downconverter normally dedicated to automatic
switchover is in rack position number |
|
Definition
|
|
Term
The AN/GSC–52 earth terminal’s frequency and timing subsystem provides precise 1pps
timing signals and precise frequency outputs of |
|
Definition
|
|
Term
In the AN/GSC–52 earth terminal’s control, monitor, and alarm group (CMA), what
equipment interfaces to separate individual subsystems and is responsible for control and status of
specific groups of terminal equipment? |
|
Definition
|
|
Term
Which Defense Meteorological Satellite Program elements receive only real-time satellite
imagery when the satellite is in view? |
|
Definition
|
|
Term
| What are the Air Force Satellite Control Network (AFSCN) command and control nodes? |
|
Definition
Environmental Satellite Operations Center at Schriever AFB, CO, and National Oceanographic
and Atmospheric Administration (NOAA) Satellite Operations Control Center at Suitland, MD. |
|
|
Term
The MARK IVB antennas can be located up to how many feet away from the processing
area? |
|
Definition
|
|
Term
| The primary interface between the operator/maintainer and the MARK IVB system is the |
|
Definition
|
|
Term
| Which agency is responsible for Defense Support Program operational control? |
|
Definition
|
|
Term
| Which components are major sets of satellite readout station equipment ? |
|
Definition
| Radio frequency set, transmit/receiver set, and digital equipment set |
|
|
Term
| In the satellite readout station, the transmit/receive set |
|
Definition
receives and processes downlink satellite signals, and generates and transmits uplink satellite
commanding and ranging signals |
|
|
Term
| What is the number of global positioning system orbital planes? |
|
Definition
|
|
Term
| The purpose of the global positioning system ground antenna is to |
|
Definition
| interface between the master ontrol station and the satellites. |
|
|
Term
Which global positioning system operation control segment component is remotely operated
and transmits and receives telemetry to and from the satellites? |
|
Definition
|
|
Term
What is the minimum number of global positioning system satellites that must be tracked for
accurate three-dimensional navigation? |
|
Definition
|
|
Term
Which is not a characteristic of the Defense Advanced Global Positioning System (GPS)
Receiver? |
|
Definition
| Can process the GPS satellite triple frequency signals |
|
|
Term
What Milstar capability is very different from previous military satellite communications
(MILSATCOM) and commercial satellite communications systems? |
|
Definition
|
|
Term
| Which element of the Milstar mission allocates communication resources? |
|
Definition
|
|
Term
The secure mobile anti-jam reliable tactical terminal (SMART-T) provides user data rates
through |
|
Definition
|
|
Term
How many active satellites does the completed Milstar phase II (Milstar II) constellation
consist of? |
|
Definition
|
|
Term
| The Milstar satellite sends downlink communications transmissions at |
|
Definition
| UHF and super-high frequency (SHF). |
|
|
Term
Which Milstar antenna provides high gain, selective coverage of any ground station visible
on the earth’s surface within its own footprint? |
|
Definition
|
|
Term
What is the maximum number of demand assigned multiple access (DAMA) networks can a
single Milstar satellite support? |
|
Definition
|
|
Term
| Encoding/decoding of a digital signal |
|
Definition
| enhances the link bit error rate |
|
|
Term
| The Milstar Air Force terminal segment has terminals that are classified as either |
|
Definition
| command post or force element |
|
|
Term
The Milstar extremely high frequency (EHF)/ultrahigh frequency (UHF) fixed ground
command post terminal has a |
|
Definition
| 90-inch antenna and a radome |
|
|
Term
What type of extremely high frequency (EHF) antenna is used on the Milstar EHF/UHF
airborne command post terminals? |
|
Definition
|
|
Term
| What agency plans and executes satellite tracking and ephemeris data generation? |
|
Definition
| Commander of the United States Strategic Command. |
|
|
Term
What agency provides personnel at the regional satellite communications (Regional
SATCOM) support center with resource allocation parameters? |
|
Definition
| Defense Information Systems Agency (DISA). |
|
|
Term
The purpose of the Defense Information Systems Agency Operations Control Complex
(DOCC) is to |
|
Definition
| provide operational control of the Defense Communications System (DCS). |
|
|
Term
| What agency ensures all satellite links perform according to baseline parameters? |
|
Definition
| Defense Satellite Communications System operations centers (DSCSOC). |
|
|
Term
Modifications on the Defense Satellite Communications System phase III (DSCS III)
satellite include |
|
Definition
| single-channel transponder (SCT) downlink |
|
|
Term
The Defense Satellite Communications System phase III (DSCS III) S-band system is
primarily used for |
|
Definition
| satellite telemetry, tracking, and control. |
|
|
Term
What constellation are the ultrahigh frequency (UHF) follow-on satellites designed to
replace? |
|
Definition
| Fleet satellite communications (FLTSATCOM) and leased satellites (LEASAT). |
|
|
Term
| Which satellite system provides Global Broadcast Services (GBS)? |
|
Definition
| Ultra high frequency (UHF) Follow-on. |
|
|
Term
When considering the factor of service area for commercial satellite services, which
description is true about Ku-band service? |
|
Definition
| Not worldwide, located primarily over land masses and highly populated areas |
|
|
Term
| Which service is not provided by the commercial satellite communications branch (CSB)? |
|
Definition
| Act as the day-to-day mobile satellite services (MSS) system manager. |
|
|
Term
Which commercial satellite communication system can offer true pole-to-pole global
coverage? |
|
Definition
|
|
Term
The Iridium secure module provides secure voice communications up to and including what
level of classification? |
|
Definition
|
|
Term
Which type of communications would not normally be provided through commercial
wideband services? |
|
Definition
| Handheld satellite phone communications. |
|
|
Term
Which service provider is a new satellite communications company specifically dedicated
to provide commercial X-band services exclusively to US and Allied governments? |
|
Definition
|
|
Term
The Predator ground control station (GCS) satellite communications (SATCOM)
subsystem provides one full-duplex encrypted digital voice channel, command and control (C2)
capability of four remotely piloted aircraft, and operates over a |
|
Definition
|
|
Term
Who submits a feeder telecommunications service request to start, stop, or change circuits,
trunks, links, or systems? |
|
Definition
| The users’ technical control facility. |
|
|
Term
| One of the functions of the telecommunication certification office is to |
|
Definition
| ensure the user agency is prepared to pay for the service |
|
|
Term
| Command communications service designators (CCSD) are divided into two classes; |
|
Definition
|
|
Term
| Telecommunications circuit restoration is normally done |
|
Definition
| by rerouting to spare channels |
|
|
Term
| The regional satellite communications support center (RSSC) is a |
|
Definition
planning cell that supports unified and specified commands with ground mobile forces access
on the DSCS. |
|
|
Term
With what agency does the regional satellite communications support center (RSSC)
coordinate for additional satellite resources if the planned deployment configuration cannot be
supported by the satellite payload configuration? |
|
Definition
| Defense Information Systems Agency (DISA). |
|
|
Term
What office resolves conflicts regarding Defense Satellite Communications System
(DSCS) ground mobile forces (GMF) satellite resources that cannot be settled by the Defense
Information Systems Agency (DISA) and the regional satellite communications support center
(RSSC)? |
|
Definition
|
|
Term
| Which statement is true about in-service performance monitoring? |
|
Definition
| It indicates the quality of the operating signal without interrupting the signal. |
|
|
Term
Which term is defined as measures taken to ensure the continued use of the frequency
spectrum by Department of Defense and friendly forces? |
|
Definition
| Counter-counter measures (CCM |
|
|
Term
What is the name of the companding scale used in US telephone networks and
standardized for analog-to-digital conversion? |
|
Definition
|
|
Term
Because they use differing conversion scales, what process must take place in order to
transmit voice/data between telephone networks in the US and European countries? |
|
Definition
|
|
Term
We refer to the physical interface between the Promina and the customer’s voice devices
as a |
|
Definition
|
|
Term
The amount of bandwidth required for the operation of a specific card or module in the
Promina is known as a |
|
Definition
|
|
Term
Which module provides the processor platform, clock, and switching matrix for the
Promina 200 and 400? |
|
Definition
|
|
Term
Larger nodes, like the Promina 800, require which type of module to store important
system code, network configurations, event logs, and network management data? |
|
Definition
|
|
Term
| The Promina signaling channel link protocol trunk module |
|
Definition
| is the sole means by which nodes communicate with each other. |
|
|
Term
During a communications unit deployment, at least one person deployed with a Promina
system must have what minimum access level assigned in order to bring up the mission? |
|
Definition
|
|
Term
Which Promina menu contains commands for managing operators and the operator
console? |
|
Definition
|
|
