Flashcards in Vol 4 UREs Deck (52):
What is the status of the transmitter when the antenna is receiving radar return echoes and beacon signals?
A phased-array antenna is limited to how many transmit and receive operations at any one time?
A synthetic aperture antenna needs an aircraft to move how far along a straight line to be coherent?
What kind of antenna is a synthetic aperture radar antenna?
Large linear array antenna
What is the frequency range of S-band?
What is the frequency range of X-band?
The local oscillator output frequency must be tunable over a range of several megahertz in what region?
Range and direction, including both azimuth and elevation of an object is important for the accuracy of what process?
Location of an object in space by radar
What does the shape of a pulse not determine?
Range to the target
What does the duration of the radar pulse determine?
Minimum range of the radar set
Continuous wave radar cannot be used on airborne surveillance because of what associated problem?
Installing two antennas with adequate isolation
What is the advantage of a single ended (or unbalanced) crystal mixer?
The purpose of a mixer stage is to convert radio frequency (RF) energy to
Lower intermediate frequency
Which component of the Tactical Interface Gateway (TIG) enables beyond line of sight (BLOS) coverage?
Which component of the Tactical Information Gateway (TIG) system interface group provides all necessary connections between group components and the TIG set?
Multipurpose interface panel
What is the purpose of the Multifunctional Information Distribution System (MIDS) data terminal?
Provide line of sight connectivity to a local area network
To prevent interference and possible terminal shutdowns, what system does the Tactical Information Gateway (TIG) system monitor?
Identification friend or foe (IFF)
How does a digital computer perform mathematical computations?
Expressing number in terms of digits
When is it desirable to use an analog voltage in circuits for some digital equipment?
Physical condition, such as azimuth is represented
Which item is not an unwanted echo or clutter in a radar?
What happens to a frequency as the pulse passes through the device dispersive delay line (DDL)?
Low frequencies are delayed longer than high frequencies
What action is the synchronizer (also known as the "timer" or "keyer") designed to perform?
Synchronize signals that time the transmitted pulses and the indicator
How is an oscillator used in the master timer type synchronizer?
Main timing reference for the radar
In the gps, how many hours must pass before almanac data is transferred to each satellite to update the navigation data message?
How many radio frequency signals are transmitted from each gps satellite?
How does the gps navigation set calculate speed?
Measuring the rate of change of the radio frequency signal
The gps has a three-dimensional position navigation accuracy of
The navigational system of the gps is time accurate to how many nanoseconds?
Which gps system feature does not make it ideal for military use?
Which gps component is passive, meaning it does not require power, adjustments, or controls to function?
Which gps unit provides a display for the ARN-151?
The purpose of the ARN-151 receiver unit is to
Process the intermediate frequency signal and calculate it into a navigation solution
To begin gps satellite tracking, what information must the operator first initialize?
Position, time, and almanac information
Which receiver interface provides communication in the binary-coded decimal format between the gps and HAVE-QUICK equipment?
Precise time and time interval (PTTI) interface
The gps interface that uses simplified computer words of specific high and low voltage levels is the
Aeronautical radio incorporated (ARINC) interface
Which gps LRU will "null out" (decrease) the unwanted signal by vector addition of all signal inputs?
What establishes the network system time for a Link-16 system?
Network time reference (NTR)
How many hops per second does a Tactical Digital Information Link (TADIL) J perform to preclude jamming by a narrow band jammer?
Which network participation group is not divided into two components that are configured as a stacked net?
What are the kilobit per second (Kbps) data rates used in a stacked net of a Tactical Digital Information Link (TADIL) J voice channels?
2.4 or 16
What is the maximum number of units that can participate in a Link-16 net?
Which field is on the Link-16 friendly status report?
What does the relative navigation (RELNAV) function of the Link-16 system determine?
The elapsed time indicator of the receiver-transmitter (RT) indicates the total time power has been
applied to the RT
Which subassembly is a part of the control monitor set (CMS)?
SDU load control unit (SLCU)
What is the power output of the High Power Amplifier Group (HPAG) in high power mode?
What power source is used to provide emergency back-up power to the Tactical Digital Information Link (TADIL) terminal to maintain critical data?
Low pass filters pass signals in which range?
What is the operating band used by Joint Tactical Information Distribution System (JTIDS)?
How many bits of data can be transmitted in a given timeslot of a Joint Tactical Information Distribution System (JTIDS)?
In coarse synchronization, how many receivers are used by the receiver-transmitter (RT)?