Navedtra 14189A, Navy Electricity And Electronics Training Series. Module 17-Radio-Frequency Communications Principles 1

Front 1

What year was the first official naval radio message sent from ship toshore

Back 1

1899

Front 2

What year was the first radiotelephone used between ships?

Back 2

1916

Front 3

In what year were the first super-heterodyne receivers installed in thefleet?

Back 3

1931

Front 4

In what year were the first successful radio teletypewriter transmissionsbetween ships completed?

Back 4

1944

Front 5

In what year did the first successful use of radiophoto (facsimile)occur?

Back 5

1945

Front 6

What refers to communications over a distance and includes anytransmission, emission, or reception of signs, signals, writings, images, orsounds?

Back 6

Telecommunications

Front 7

What is the most important method the Navy has of communicatingbetween widely separated forces?

Back 7

Radio

Front 8

What was the first means of radio communications that had militaryand commercial importance?

Back 8

Radiotelegraphy

Front 9

Line-of-sight characteristics limit the usual range of radiotelephonefrom how many miles?

Back 9

20 to 25

Front 10

The Navy uses radio teletypewriter (rtty) mainly for high-speedautomatic communications across ocean areas and has a normal speed ofoperation of how many words per minute?

Back 10

100

Front 11

What is the process used to transmit photographs, charts, and othergraphic information electronically?

Back 11

Facsimile (fax)

Front 12

What is a combination of sets, units, assemblies, subassemblies, andparts joined together to perform a specific operational function or severalfunctions?

Back 12

System

Front 13

What consists of a unit or units and the assemblies, subassemblies,and parts connected or associated together to perform a specific function?

Back 13

Set

Front 14

What is a collection of units, assemblies, subassemblies, and parts?

Back 14

Group

Front 15

What is an assembly or any combination of parts, subassemblies, andassemblies mounted together?

Back 15

Unit

Front 16

What is a number of parts or subassemblies, or any combinationthereof, joined together to perform a specific function?

Back 16

Assembly

Front 17

What is one component or two or more components joined together?

Back 17

Part

Front 18

What is the frequency range for the extremely high frequency (EHF)band?

Back 18

30 GHZ - 300 GHz

Front 19

What is the frequency range for the super high frequency (SHF) band?

Back 19

3 GHZ - 30 GHz

Front 20

What is the frequency range for the ultra high frequency (UHF) band?

Back 20

300 MHZ - 3 GHz

Front 21

What is the frequency range for the very high frequency (VHF) band?

Back 21

30 MHZ - 300 MHz

Front 22

What is the frequency range for the high frequency (HF) band?

Back 22

3 MHZ - 30 MHz

Front 23

What is the frequency range for the medium frequency (MF) band?

Back 23

300 KHZ - 3 MHz

Front 24

What is the frequency range for the low frequency (LF) band?

Back 24

30 KHZ - 300 KHz

Front 25

What is the frequency range for the very low frequency (VLF) band?

Back 25

3 KHZ - 30 KHz

Front 26

What is the frequency range for the extremely low frequency (ELF)band?

Back 26

Up to 300 Hz

Front 27

What band has the ability to penetrate ocean depths to several hundredfeet with little signal loss?

Back 27

ELF

Front 28

What type of transmission is normally considered a broadcast, that is,one-way transmission, no reply required?

Back 28

VLF

Front 29

What systems are established to communicate over long- distancetrunks or links between fixed terminals?

Back 29

Point-to-point

Front 30

What is normally a message circuit between two points that are bothswitching centers or individual message distribution points?

Back 30

Trunk

Front 31

What is a transmitter-receiver system connecting two locations?

Back 31

Link