Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
160 Cards in this Set
- Front
- Back
What type of equipment is used to coordinate the activities of fleet units by linking them with each other and shore stations?
|
Radio
|
|
Radio is the transmission and reception of electronic impulses or signals through space by means of what type of waves?
|
Electromagnetic
|
|
Who is ultimately responsible for safety?
|
Everyone
|
|
What are the basic requirements of a communications system?
|
Transmitter and receiver
|
|
AN/UCC-1, AN/URA-17, and CV-2460 are examples of what type of shipboard equipment?
|
Terminal
|
|
Which of the following frequency bands has limited naval use?
|
MF
|
|
What does the abbreviation "los" commonly mean?
|
Line-of-sight
|
|
The super-high frequency band is used extensively in what type of communications?
|
Microwave
|
|
The emission class of an rf transmitter is based on what characteristic?
|
Modulation
|
|
What type of modulation is especially suited for use in time-division multiplexing?
|
Pulse
|
|
For modern communication needs, CW is not a preferred method. Why is this true?
|
CW is slow
|
|
In an FM transmitter, the audio signal shifts the carrier frequency in what network?
|
Audio-shift
|
|
Which of the four receiver functions involves extraction of the modulation from the rf signal?
|
Detection
|
|
Which of the four receiver characterisitics require compromise because of bandpass requirements?
|
Selectivity and fidelity
|
|
What term is used to describe receiver amplification?
|
Gain
|
|
The term "dBm" is based on what standard reference level?
|
1 milliwatt
|
|
How many radio set controls can be paralleled to one transmitter/receiver group?
|
Four
|
|
To transfer control of switched circuits to another transmitter or receiver switchboard, you should use what switch position?
|
X
|
|
Which of the following terms is used for a machine that operates as a single-phase transformer?
|
Synchro
|
|
Extremely-low-frequency transmission is primarily directed at which of the following users?
|
Submarines
|
|
The very-low-frequency receive system is designed to receive what types of signals?
|
FSK and ICW
|
|
HF communications from shorebased transmitters to ships at sea using frequency and space diversity is an example to which of the following types of systems?
|
Fleet broadcast
|
|
Which one of the following equipment would you use to match a transmitter's output impedance to an antenna's input impedance?
|
AN/URA-38
|
|
The AN/VRC-80 is not just a vhf transmitter or receiver. What is the name given to a piece of equipment that performs both functions?
|
Transceiver
|
|
During UHF secure voice transmission, the operator uses a secure voice remote phone unit. What is the common term for this unit?
|
RPU
|
|
What term is normally used for microwave transmitter input signal?
|
Baseband signal
|
|
In a microwave transmitter, the linearize couples a portion of the output power back to the klystron. This allows for modulation densities as high as 1200 channels and compensates for what klystrong deficiency?
|
Nonlinearity
|
|
In a typical microwave receiver, what is the standard intermediate frequency?
|
70 MHz
|
|
Which of the following methods are usually used for microwave communications?
|
LOS and troposcatter
|
|
By which of the following methods can you increase the maximum number of intelligible signals transmitted on a single path?
|
Multiplexing
|
|
Which of the following communications methods involves subdividing a channel into smaller segments of equal size and placing a signal in each subchannel?
|
TDM
|
|
How many crypto and plain subsystems are used within SAS?
|
Two
|
|
One mode of teletypewriter operation is the synchronous mode. What other mode is used for basic teletypewriter operation?
|
Asynchronous
|
|
What is the name of the five unit code that includes mark and space signals and is used in teletypewriter operation?
|
Baudot
|
|
Which of the following problems is reduced by not using start and stop signals in the synchronous teletypewriter mode?
|
Distorted signal
|
|
Which of the following terms actually pertains only to modulation rate?
|
Baud
|
|
What device is used to change TTY DC pulses into mark and space signals to modulate the transmitter carrier wave?
|
Keyer
|
|
The Navy's two basic RATT systems are AFTS and RFCS. What is the RFCS system commonly called?
|
FSK
|
|
What device provides looping current for the tty?
|
A solid state power supply
|
|
What is/are used to interconnect all the TTY equpiment in any configuration needed?
|
TTY panel
|
|
During unpatching, pulling which plug from its tty panel jack first will produce a dangerous dc voltage on the exposed plug?
|
Set
|
|
How many rotary switch positions will you find on a remote transmitter control unit?
|
Three
|
|
What type of frequency diversity is used for multichannel?
|
Tone
|
|
Which of the following methods should you use to transmit printed text?
|
Facsimile
|
|
In whihc of the following publications can you find information on TEMPEST requirements?
|
MIL-STD-1680
|
|
What is the designator of any conductor intended to carry classified plain language terminating in RED equipment or the RED side of crypto equipment?
|
Primary Red
|
|
Of the following radios, which is popularly known as the "Gibson girl"?
|
AN/CRT-3A
|
|
Which of the following radios is particularly useful during tactical black-out operations?
|
AN/PRC-104
|
|
Which of the following radios has frequency hopping capability?
|
AN/PRC-117
|
|
The use of frequency hopping has certain advantages. One advantage is that the signal is difficult to detect. How is this accomplished?
|
No single carrier is used
|
|
What system was specifically designed to provide solutions to equipment planning by automatically determining the best system that each participant in a communications link should use?
|
CLIPS
|
|
Which term refers to reception and retransmission?
|
Active
|
|
Which of the following terms refers to transmissions received from a satellite?
|
Downlink
|
|
SATCOM links are only slightly affected by what phenomena associated with hf propogation difficulties?
|
Atmospheric
|
|
Trained crews can set up what type of satellite earth terminals within hours to establish communications in remote areas?
|
Mobile
|
|
How many NCTAMS have primary responsibility for communications via satellite?
|
Four
|
|
What system do subscribers use to receive Fleet Satellite Broadcast?
|
AN/SSR-1
|
|
What is the minimum number of broadcast channels that NAVMACS guards automatically?
|
Four
|
|
What is the bandwith (in kHz) of the satellite channels allocated to CUDIXS/NAVMACS?
|
25
|
|
What term is associated with a submarine commander's ability to receive messages via satellite at scheduled intervals?
|
Group broadcasts
|
|
Secure voice uses digitized voice with a 3-kHz voice channel. What type of voice modulation does this describe?
|
Narrowband
|
|
When using Secure Voice, a ship must contact what authority before initiating communications with a shore command?
|
Voice controller
|
|
Which of the following is a subsystem specifically designed for special intelligence communicatons?
|
TACINTEL
|
|
TADIXS-equipped surface ships and submarines operate in what mode?
|
Receive only
|
|
What subsystem is used in conjunction with TADIXS to transmit OTH-T data from the fleet to other ships and shore commands?
|
OTCIXS
|
|
What system was developed to multiplex several users on one 25-kHz satellite channel?
|
DAMA
|
|
What term is used to describe how the Demand Assigned Multiple Access data stream is formatted?
|
Frame
|
|
In the DAMA multiplexed data stream, which slow is used to test for communications error?
|
Link
|
|
What are all DAMA multiplexor transmit times referenced to?
|
The satellite
|
|
Which of the following equipments is used as the DAMA mulitplexor?
|
TD-1217B/U
|
|
Who performs day-to-day control and operatio nof naval satellite communications assets?
|
Naval Computer and Telecommunications Command
|
|
How man FLTSATCOM satellites have ehf packages installed?
|
Two
|
|
LEASAT satellites have fewer 25 kHz channels than FLTSATs. What ground based system do they use to maintain communications efficiency?
|
DAMA
|
|
What is the replacement satellite for GAPFILLER, FLTSATCOM, and LEASAT?
|
UHF F/O
|
|
The AN/FSC-79 satellite communications terminal transmits on what band?
|
SHF
|
|
Which of the following is another term used to describe the shf communications band?
|
X-band
|
|
The AN/WSC-5(V) UHF transceiver is capable of using differentially encoded phaseshift-keying and what other type of modulation?
|
FM
|
|
Which of the folloiwng radios is the primary shipboard los and satellite transceiver?
|
AN/WSC-3
|
|
What shipboard system is used to receive Fleet Satellite Broadcast?
|
AN/SSR-1
|
|
Which of the following is a spread spectrum type modem and is used with the AN/FSC-79 satellite communications terminal?
|
OM-51A/FR
|
|
The AN/USQ-69(V) data terminal set is currently used with what two subsystems?
|
TACINTEL/ NAVMACS
|
|
Audio digital converter CV-3333/U is used primarily as an analog-to-digital converter for what type of communications?
|
Secure voice
|
|
Where are the system interface connectors installed on the Electrical Equipment Rack CY-7597/WSC-3?
|
On the top panel
|
|
DAMA-equipped shore installations use the OK-481(V)2/FSC Control Monitor Group to interface TD-1271B/Us, AN/WSC-5(V)s, and baseband equipment. It can accomodate up to how many TD-1271B/Us?
|
14
|
|
Link-11 is designated as which of the following types of tactical data information link?
|
TADIL A
|
|
Link-11 Communications can operate with which of the following radios?
|
HF or UHF
|
|
The size of an antenna is determined by which of the following factors?
|
The operating frequency
|
|
The frequency range of an antenna can be extended by adding which of the following factors?
|
Either a capacitive or an inductive load
|
|
Whihc of the folloiwng function s ins NOT performed by the data terminal set?
|
Converting audio tones to digital data
|
|
The data terminal set communicates with the radio set via which of the following devices?
|
The communications switchboard
|
|
Which of the following individuals is responsible for assigning primary and secondar Link-11 frequencies before the deployment of a task force?
|
The task force commander
|
|
Net Sync continuously broadcasts which of the following signals?
|
Preamble frames
|
|
When the stored sync mode is operating, the picket station uses which of the following signals to establish a time base?
|
The sync signal received from NCS
|
|
Which of the folloiwng functions is NOT tested when Net Test is running?
|
CDS computer to DTS interface
|
|
The preamble of a Link-11message consists of a total of how many frames?
|
Five
|
|
During transmission of the preamble, the 605 Hz tone is transmitted at which of the following power levels?
|
+ 6 dB
|
|
To enable the DTS to detect frame transitions during the preamble, the 2915 HZ sync tone is phase shifted how many degrees at each frame?
|
180 degrees
|
|
Exactly how many data bits are contained in each Link-11 information frame?
|
24
|
|
The control stop code is generated by which of the following units?
|
NCS only
|
|
A call-up, or interrogation message, consisits of a total of how many frames?
|
Five
|
|
The two frames following a control stop code indicate which of the following?
|
The next picket address in the roll call
|
|
The DTS operates in full duplex when it performs which of the following operations?
|
System Testing
|
|
The DTS performs which of the followng functions?
|
Error detection and correction
|
|
The xis hamming bits added to the data word enables the DTS to correct what maximum number of data bits?
|
One
|
|
The DTS develops a composite signal consisting of what total number of frequency division multiplexed audio-frequency tones?
|
16
|
|
Bits 4 and 5 of a 30-bit data word are carried by which of the following audio tone frequencies?
|
1155 Hz
|
|
What is the basic unit of the Link-11 Transmission?
|
Tone
|
|
In a single frame, the DTS can tolerate what maximum phase shift error without generating an error code?
|
+/- 44 degrees
|
|
Which of the following Link-11 signals allows the receiving unit to correct errors caused by the relative motion between the sending and receiving units?
|
Doppler tone
|
|
When the DTS is in the OPERATE mode, exactly how many fault sensing sensors can cause the SUMMARY FAULT lamp to light?
|
14
|
|
When the SIDEBAND SELECT switch is in the DIV position, which sideband signal is processed for input to the computer?
|
The combination of the USB and LSB signals
|
|
During normal Link-11 operations, the DATA RATE switch on the mode control panel should be in which of the following positions?
|
TADIL A
|
|
The SYNC MODE switch on the mode control panel is used in conjunction with which of the following switches on the TADIL A Control Panel?
|
TIMING STORED/CORRECTED switch
|
|
The NET BUSY indicator of the TADIL A control panel is activated by which of the following signals?
|
Signal presence
|
|
The SYNC COMPT indicator is lighted after the DTS has acheived which of the following conditions?
|
It is in sync with NCS
|
|
With a single address control indcator, an NCS platform can control what maximum number of participating units?
|
20
|
|
Data exchange between the Link-11 DTS and the CDS computer is controlled by the DTS using which fo the following control signal protocols?
|
External interrupts
|
|
When the DTS recognizes own station address, it transmits which of the following signals first?
|
The first frame of the preamble
|
|
Whihc of the folloiwng events takes place when the CDS computer does not answer an ODR from the DTS within the specified time limit?
|
The DTS generates the stop code
|
|
Which of the following events occur if an interrogated picket station does not answer an initial interrogations from the NCS within 15 frame intervals?
|
NCS retransmits the interrogation to the unit that did not reply
|
|
A total of how many data tones are in teh composite tone package developed by the DTS?
|
16
|
|
During receive operations, exactly how many EDAC bits are extracted from the received data tones?
|
6
|
|
The EDAC bits enable the DTS to correct a total of how many received bit errors?
|
1
|
|
When operating the Link-11 with a UHF radio set, you should place the SIDEBAND SELECT switch in what position only?
|
USB
|
|
When you keep the radio set tuned to output maximum power, it causes which of the following problems?
|
Increases RFI/EMI on the transmitting unit only
|
|
When the NCS enters dummy PUs, whcih fo the following net conditions will exist, if any?
|
Net cycle time increases
|
|
When you set up the DTS to run a single-station POFA with the radio set, which of the following equipments is/are NOT checked?
|
Antenna coupler
|
|
Running a single-station POFA can assist the technician in isolating a problem in which of the following sections of DTS?
|
Transmit timing
|
|
A single broken line in the switchboard between the DTS and the crypto device could cause which of the following problems?
|
All bits randomly set to a logic "1" or a logic "0"
|
|
When you set up the DTS to runa single station POFA, the DTS must be configured to operate inw hich of the following modes?
|
POFA test mode
|
|
The multi-station POFA is run, what total number of data words are in each block of data transmitted?
|
230
|
|
When a multi-station POFA is run, all units participating in the test should be positioned within how many miles of each other?
|
25
|
|
A multi-station POFA should be run using which of the following frequencies?
|
The current operational frequency only
|
|
The multi-station POFA should be run for what minimum amount of time?
|
5 minutes
|
|
A multi-station POFA should be considered successful when the link quality factor is which of the following values?
|
Greater than 95 percent but less than 100 percent
|
|
A multi-station POFA is considered successful when the computed receive error factor is less than what percentage?
|
1
|
|
Which of the following buffers is acceptable to be received from an unrecognized station (UNREC STA) when a multistation POFA is running?
|
One buffer of 230 words
|
|
The DPG and CDG equipment cases of the LMS-11 provide isolation from which of the following environmental forces?
|
Shock and vibration
|
|
The LMS-11 system printer is part of which of the following equipment groups?
|
Accessory
|
|
The multi-station POFA is run in which of the following modes?
|
Roll call
|
|
The HP 9920U computer of the LMS-11 contains what amount of random access memory (RAM)?
|
2 MB
|
|
To determine the phase shift of the Link-11 audio tones, the LMS-11 uses which of the following methods?
|
Fast Fourier Transform Formula
|
|
The control/display group consists of which of the following units?
|
Color monitor and keyboard
|
|
The color display monitor of the LMS-11 uses composite video when it performs which of the following operations?
|
Both start-up and testing operations
|
|
When initializing the LMS-11, the operator enters 127 frames as teh CALL-TIMEOUT value. What type of Link-11 operation is indicated by this entry?
|
Satellite Link Operation
|
|
The link monitor mode of the LMS-11 displays what information?
|
Real-tiem link activity
|
|
Which of the following function keys on the LMS-11 keyboard would the operator depress to select the link monitor mode?
|
LM
|
|
A PU address of 77 is used by the LMS-11 to indicate which of the following units, if any?
|
NCS
|
|
Carrier suppression can only be tested when the Link-11 system is operating in which of the following modes?
|
Net Sync
|
|
Link-4A is used to transmit which of the following types of information?
|
Aircraft control and target information
|
|
Link-4A data is transmitted by using which of the following methods?
|
Frequency-shift keying
|
|
What ist he maximum number of aircraft that can be controlled by a single Link-4A controlling station?
|
100
|
|
In which of the following Link-4A modes of operation is an aircraft directed to a specific location to be at an optimum position for an attack?
|
Intercept vectoring
|
|
Intercept vectoring in which of the following Link-4A modes of operation is used to maintain safe flight patterns and assigns priority for landing approach?
|
Air traffic control
|
|
Which of the following Link-4A modes of operation is used for the remote guidance of bombers, reconnaissance aircraft, and drones?
|
Precision course direction
|
|
In which of the folloiwng Link-4A modes of operation is used to land an aircraft ont he flight deck of a carrier?
|
Automatic carrier landing system
|
|
The CAINS aircraft alignment data loaded into the navigation computer of the aircraft consists of which of the following types of data?
|
the latitude, longitude, and ship's velocity
|
|
The CAINS receive cycle duration is equal to what total number of milliseconds?
|
18
|
|
What total number of time slots make up the sync preamble of each transmit frame?
|
13
|
|
What total number of transmit frame time slots contain message data bits?
|
56
|