Term
| What does "frequency accuracy" refer to when discussing transmitters? |
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Definition
| Its ability to maintain a constant output carrier. |
|
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Term
| What does the modulation envelope represtent? |
|
Definition
| The algebraic sum of the carrier and sidebands. |
|
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Term
| What three frequencies are contained in the modulated carreier wave? |
|
Definition
| Carrier frequency, upper sideband freq, lower sideband freq. |
|
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Term
What are two results of overmodulation? |
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Definition
| Severe distortion and increase in bandwidth of an AM signal. |
|
|
Term
| What is a "superhterodyne" receiver? |
|
Definition
| One that makes use of a mixer to produce an IF signal. |
|
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Term
|
Definition
| The process of recovering intelligence from the modulated wave. |
|
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Term
| What are the main drawbacks of using diode detectors? |
|
Definition
| They provide no power gain and selectivity is affected by loading of the tank. |
|
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Term
| Which module of the AN/GRC-171B(V)4 controls all activities of the transceiver? |
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Definition
|
|
Term
| What Happens to the guard receiver when the transceiver is keyed? |
|
Definition
| The guard receiver is disabled. |
|
|
Term
| What is the RF output power when in FM mode? |
|
Definition
|
|
Term
| On the AN/GRC-171B(V)4, what causes all 6's to be displayed on the FREQ/CHAN display? |
|
Definition
| An overtemperature condition. |
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|
Term
| On the AN/URC-119, what is the purpose of the clipper circuit? |
|
Definition
Removes voice peaks to raise the average RF output level. |
|
|
Term
| If your antenna is other than 50 ohms, what do you need to effectively communicate with the RT-1446? |
|
Definition
|
|
Term
What determines which IF filter, following the second mixer, is selectedin the AN/URC-119? |
|
Definition
|
|
Term
| What are the outputs that are muted by the squelch curcuit in the C-11329/URC? |
|
Definition
| Only the speaker and headset audio outputs are muted. |
|
|
Term
| What are three types of transmission loss? |
|
Definition
Resistive, Skin-effect, Induction. |
|
|
Term
| What are the major power losses in a flexible coaxial cable? |
|
Definition
Dielectric and Skin effect. |
|
|
Term
| As signal frequency decreases, what happens to wavelength? |
|
Definition
|
|
Term
| What is the unit of measure for electrical length as as signal frequency decreases? |
|
Definition
|
|
Term
| What is a nonresonant transmission line? |
|
Definition
| A line having no reflected waves. |
|
|
Term
| What is an incident wave? |
|
Definition
| Voltage and current waves as they move from source to load. |
|
|
Term
|
Definition
| The vector sum of the forward and reflected waves. |
|
|
Term
| At what level will voltage be at an open terminator? |
|
Definition
|
|
Term
| At what frequencies are waveguides used? |
|
Definition
| For frequencies so high their wavelenght is miniscule. |
|
|
Term
| what physical properties determine the characteristics of a rectangular wave? |
|
Definition
| Internal height and width. |
|
|
Term
| aside from the lower conductor loss, what is the greatest merit of a waveguide? |
|
Definition
| Simplicity of construction |
|
|
Term
| what effect does internal moisture have on a waveguide? |
|
Definition
| It can cause serious internal arcing. |
|
|
Term
| What three components make up the ground wave? |
|
Definition
| The ground-reflected wave, direct wave, surface wave. |
|
|
Term
| What term defines two or more signals arriving at the receiver from different paths and interfering with each other? |
|
Definition
|
|
Term
what is a drawback of using and omnidirectional antenna? |
|
Definition
| It is susceptible to interference from any direction. |
|
|
Term
| what is the relationship between "directivity" and "radiation angle"? |
|
Definition
|
|
Term
| What is th maximum power that an AN/GRA-4 can handle? |
|
Definition
|
|
Term
| What type of antenna can be used to determine the location of a transmitter? |
|
Definition
| A direction-finding antenna. |
|
|
Term
| What useable frequency range propagates through the earth's atmosphere? |
|
Definition
|
|
Term
| At what altitude are most geosynchronous satellites placed? |
|
Definition
| 22,528 Miles above the earth |
|
|
Term
| What are the terms for the nearest and farthest distances a satellite's orbit comes to the earth? |
|
Definition
| Perigee (nearest) apogee (farthest) |
|
|
Term
| What are the two types of orbital control used on satellites? |
|
Definition
| Attitude control and station keeping |
|
|
Term
| How is tracking a satellite accomplished? |
|
Definition
|
|
Term
| What does the active communications satellites make possible? |
|
Definition
| The use of smaller ground terminals. |
|
|
Term
| what are two types of active satellites? |
|
Definition
|
|
Term
| Who may function as a network control system? |
|
Definition
Any unit with required hardware and software. |
|
|
Term
| What is the fequency range in which the AN/PSC-d can operate in DAMA? |
|
Definition
|
|
Term
| What is the reference frequency for the first synthesizer loop? |
|
Definition
|
|
Term
| Which AN/PSC-5 module performs BIT functions? |
|
Definition
|
|
Term
| In AM receive mode, what generates the AGC voltage? |
|
Definition
|
|
Term
| What is the output power of the an/PRC-117F in HAVEQUICK mode? |
|
Definition
|
|
Term
| How many available DAMA net presets does the AN/PRC-117F have? |
|
Definition
|
|
Term
| What are the components of GPS? |
|
Definition
|
|
Term
| What are the missions of the GPS navigation mission? |
|
Definition
| Navigation, nuclear, and timing transfer |
|
|
Term
| At what angle does the PLGR compute? |
|
Definition
|
|
Term
| What are the two satellite telephone systems the Air Force uses? |
|
Definition
|
|
Term
| How many eries of satellites does the INMARSAT satellite constellation have? |
|
Definition
|
|
Term
| Which INMARSAT terminal equipment can be used in CONUS? |
|
Definition
| Standard "A" terminal equipment |
|
|
Term
| What does the Iridium satellite constellation consist of? |
|
Definition
| 66 low-earth orbiting (LEO) satellites |
|
|
Term
| What are some of the problems with the wireless LAN networks? |
|
Definition
| Security and interference |
|
|
Term
| What ar the types of wireless LAN infrastructures? |
|
Definition
| Peer-to-peer and infrastructure modes |
|
|
Term
| 802.11a standard uses what frequency band? |
|
Definition
|
|
Term
|
Definition
A bluetooth group of 8 devices |
|
|
Term
| What are the physical configurations of mobile radios? |
|
Definition
| Mobile-vehicular adaptor, the integrated mount, and remote input |
|
|
Term
What makes up the central repeater site? |
|
Definition
| the central controller, repeaters, antenna combining equipment and antennas |
|
|
Term
| How many talkgroups can a portable radio monitor at once? |
|
Definition
|
|
Term
| What ar the three basic types of cellular service? |
|
Definition
|
|
Term
Which cellular technology is dominant global standard outside of North America? |
|
Definition
|
|
Term
| Which cellular technology permits access to a single carrier frequency by slicing it into time slots? |
|
Definition
|
|
Term
|
Definition
| The method of encryption and decryption. |
|
|
Term
| What are the two classes of key-based encryption algorithms? |
|
Definition
|
|
Term
| How is COMSEC hardware categorized when it's empty and free of codes? |
|
Definition
|
|
Term
| How do you operate a KOI-18? |
|
Definition
| Slide the tape into the reader and pull it out at a moderate rate |
|
|
Term
| How do you verify the presence of a code in a KYK-13? |
|
Definition
| The red indicator light blinks when you press the initiate button on the OFF/CHECK position |
|
|
Term
| What does the frequency-hopping signal look like to a receiver that is not synchronized to the transmitter? |
|
Definition
|
|
Term
| What type of techniques makes the HAVEQUICK and SINCGARS radios effective against jamming, compared to older systems? |
|
Definition
|
|
Term
| What type of system uses a combination of spread spectrum methods to use the beneficial properties of the systems used? |
|
Definition
|
|
Term
| What is the purpose of WOD and TOD |
|
Definition
| to decide which frequency they should be on at any given time |
|
|
Term
| What is the purpose of HAVEQUICK radios? |
|
Definition
| To prevent unfriendly forces from interfering with our communications |
|
|
Term
| What does the term "ICOM" indicate? |
|
Definition
| Integrated COMSEC ability |
|
|
Term
| Which section of the RT-1523 is responsible for modulation and demodulation? |
|
Definition
|
|
Term
| How many different bands are contained in the impedance matching network? |
|
Definition
|
|
Term
| Which band of impedance matching network is used if a BNC-type connector to the RT? |
|
Definition
|
|
Term
| Which RF section module performs modulation of the carrier? |
|
Definition
| The exciter/ power amplifier |
|
|
Term
| What is the primary mode of operation of TADIL-A? |
|
Definition
|
|
Term
| What is the purpose of TADIL-A and TADIL-C? |
|
Definition
| The exchange of real-time tactical data |
|
|
Term
| What are messages used to exchange information ofer TADIL-A known as? |
|
Definition
|
|
Term
| What is the primary finction of JTIDS? |
|
Definition
| To distribute tactical information in digital form |
|
|
Term
| What are the two major functions of EPLRS? |
|
Definition
| Data distribution and position locations and reporting |
|
|
Term
| Which data link application integrates US Air Force close air support aircraft with the digitized battlefield? |
|
Definition
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