Navy Electricity and Electronics Training Series
Module 12—Modulation Principles
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DISTRIBUTION STATEMENT A: Approved for public release; distribution is
By enrolling in this self-study course, you have demonstrated a desire to improve yourself and the Navy.
Remember, however, this self-study course is only one part the total Navy training program. Practical experience,
schools, selected reading, and your desire to succeed are also necessary to successfully round out a fully
meaningful training program.
COURSE OVERVIEW: To introduce the student to the subject Circuit Protection, Control, and Measurement who
needs such a background in accomplishing daily work and/or in preparing for further study.
This self-study course is organized into subject matter areas, each containing learning objectives to help you
determine what you should learn along with text and illustrations to help you understand the information. The
subject matter reflects day-to-day requirements and experiences personnel in the rating or skill area. It also
reflects guidance provided by Enlisted Community Managers (ECMs) and other senior personnel, technical references,
instructions, etc., and either the occupational or naval standards, which are listed in the Manual Navy Enlisted
Manpower Personnel Classifications and Occupational Standards, NAVPERS 18068.
THE QUESTIONS: The questions
that appear in this course are designed to help you understand the material in the text.
completing this course, you will improve your military and professional knowledge. Importantly, it can also help
you study for the Navy-wide advancement in rate examination. If you are studying and discover a reference in the
text to another publication for further information, look it up.
1998 Edition Prepared by
FCC(SW) James L. Hicks
NAVAL EDUCATION AND TRAINING PRESSIONAL DEVELOPMENT
AND TECHNOLOGY CENTER
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1. Amplitude Modulation
Angle and Pulse Modulation
NAVY ELECTRICITY AND ELECTRONICS TRAINING SERIES
The Navy Electricity and Electronics Training Series (NEETS) was developed for use by personnel in many
electrical- and electronic-related Navy ratings. Written by, and with the advice , senior technicians in these
ratings, this series provides beginners with fundamental electrical and electronic concepts through self-study.
The presentation this series is not oriented to any specific rating structure, but is divided into modules
containing related information organized into traditional paths instruction.
The series is designed to
give small amounts information that can be easily digested before advancing further into the more complex
material. For a student just becoming acquainted with electricity or electronics, it is highly recommended that
the modules be studied in their suggested sequence. While there is a listing NEETS by module title, the following
brief descriptions give a quick overview how the individual modules flow together.
Module 1, Introduction
to Matter, Energy, and Direct Current, introduces the course with a short history electricity and electronics and
proceeds into the characteristics matter, energy, and direct current (dc). It also describes some the general
safety precautions and first-aid procedures that should be common knowledge for a person working in the field
electricity. Related safety hints are located throughout the rest the series, as well.
Module 2, Introduction to Alternating Current and Transformers, is an introduction to alternating current
(ac) and transformers, including basic ac theory and fundamentals electromagnetism, inductance, capacitance,
impedance, and transformers.
Module 3, Introduction to Circuit Protection, Control, and Measurement,
encompasses circuit breakers, fuses, and current limiters used in circuit protection, as well as the theory and
use meters as electrical measuring devices.
Module 4, Introduction to Electrical Conductors, Wiring
Techniques, and Schematic Reading, presents conductor usage, insulation used as wire covering, splicing,
termination wiring, soldering, and reading electrical wiring diagrams.
Module 5, Introduction to
Generators and Motors, is an introduction to generators and motors, and covers the uses ac and dc generators and
motors in the conversion electrical and mechanical energies.
Module 6, Introduction to Electronic Emission, Tubes, and Power Supplies, ties the first five modules together in
an introduction to vacuum tubes and vacuum-tube power supplies.
Module 7, Introduction to Solid-State
Devices and Power Supplies, is similar to module 6, but it is in reference to solid-state devices.
8, Introduction to Amplifiers, covers amplifiers.
Module 9, Introduction to Wave-Generation and
Wave-Shaping Circuits, discusses wave generation and wave-shaping circuits.
Module 10, Introduction to
Wave Propagation, Transmission Lines, and Antennas, presents the characteristics wave propagation, transmission
lines, and antennas.
Module 11, Microwave Principles, explains microwave oscillators, amplifiers, and waveguides.
Module 12, Modulation Principles, discusses the principles modulation.
Module 13, Introduction to Number
Systems and Logic Circuits, presents the fundamental concepts number systems, Boolean algebra, and logic circuits,
all which pertain to digital computers.
Module 14, Introduction to Microelectronics, covers
microelectronics technology and miniature and microminiature circuit repair.
Module 15, Principles
Synchros, Servos, and Gyros, provides the basic principles, operations, functions, and applications synchro,
servo, and gyro mechanisms.
Module 16, Introduction to Test Equipment, is an introduction to some the more
commonly used test equipments and their applications.
Module 17, Radio-Frequency Communications Principles, presents the fundamentals a radio- frequency
Module 18, Radar Principles, covers the fundamentals a radar system.
19, The Technician's Handbook, is a handy reference commonly used general information, such as electrical and
electronic formulas, color coding, and naval supply system data.
Module 20, Master Glossary, is the
glossary terms for the series.
Module 21, Test Methods and Practices, describes basic test methods and practices.
Introduction to Digital Computers, is an introduction to digital computers.
Module 23, Magnetic Recording,
is an introduction to the use and maintenance magnetic recorders and the concepts recording on magnetic tape and
Module 24, Introduction to Fiber Optics, is an introduction to fiber optics.
questions are inserted throughout each module, except for modules 19 and 20, which are reference books. If you
have any difficulty in answering any the questions, restudy the applicable section.
Although an attempt
has been made to use simple language, various technical words and phrases have necessarily been included. Specific
terms are defined in Module 20, Master Glossary.
Considerable emphasis has been placed on illustrations to provide a maximum amount information. In some
instances, a knowledge basic algebra may be required.
Assignments are provided for each module, with the
exceptions Module 19, The Technician's Handbook; and Module 20, Master Glossary. Course descriptions and ordering
information are in NAVEDTRA 12061, Catalog Nonresident Training Courses.
Throughout the text this course and while using technical manuals associated with the equipment you
will be working on, you will find the below notations at the end some paragraphs. The notations are used to
emphasize that safety hazards exist and care must be taken or observed.
AN OPERATING PROCEDURE, PRACTICE, OR CONDITION, ETC., WHICH MAY RESULT IN INJURY OR DEATH IF NOT CAREFULLY
OBSERVED OR FOLLOWED.
AN OPERATING PROCEDURE, PRACTICE, OR CONDITION, ETC., WHICH MAY RESULT IN DAMAGE TO EQUIPMENT IF NOT CAREFULLY
OBSERVED OR FOLLOWED.
An operating procedure, practice, or condition, etc., which is essential to emphasize.
INSTRUCTIONS FOR TAKING THE COURSE
The text pages that you are to study are listed at the beginning each
assignment. Study these pages carefully before attempting to answer the questions. Pay close attention to tables
and illustrations and read the learning objectives. The learning objectives state what you should be able to do
after studying the material. Answering the questions correctly helps you accomplish the objectives.
SELECTING YOUR ANSWERS
Read each question carefully, then select the BEST answer. You may refer
freely to the text. The answers must be the result your own work and decisions. You are prohibited from referring
to or copying the answers others and from giving answers to anyone else taking the course.
SUBMITTING YOUR ASSIGNMENTS
To have your assignments graded, you must be enrolled in the course with the Nonresident Training
Course Administration Branch at the Naval Education and Training Professional Development and Technology Center
(NETPDTC). Following enrollment, there are two ways having your assignments graded: (1) use the Internet to submit
your assignments as you complete them, or (2) send all the assignments at one time by mail to NETPDTC.
Grading on the Internet: Advantages to
Internet grading are:
• you may submit your answers as soon as
you complete an assignment, and
• you get your results faster; usually by the next working day (approximately
In addition to receiving grade results for each assignment, you will receive course completion
confirmation once you have completed all the assignments. To submit your assignment answers via the Internet, go
Grading by Mail:
When you submit answer sheets by mail, send all your assignments at one time. Do NOT submit individual answer
sheets for grading. Mail all your assignments in an envelope, which you either provide yourself or obtain from
your nearest Educational Services Officer (ESO). Submit answer sheets to:
COMMANDING FICER NETPDTC N331
6490 SAUFLEY FIELD ROAD PENSACOLA FL 32559-5000
Answer Sheets: All courses include one “scannable” answer
sheet for each assignment. These answer sheets are preprinted with your SSN, name, assignment number, and course
number. Explanations for completing the answer sheets are on the answer sheet.
Do not use answer sheet
reproductions: Use only the original answer sheets that we provide—reproductions will not work with our scanning
equipment and cannot be processed.
Follow the instructions for marking your answers on the answer sheet.
Be sure that blocks
1, 2, and 3 are filled in correctly. This information is necessary for your course to be
properly processed and for you to receive credit for your work.
Courses must be completed within 12 months from the date
enrollment. This includes time required to resubmit failed assignments.
PASS/FAIL ASSIGNMENT PROCEDURES
If your overall course score is 3.2 or
higher, you will pass the course and will not be required to resubmit assignments. Once your assignments have been
graded you will receive course completion confirmation.
If you receive less than a 3.2 on any assignment
and your overall course score is below 3.2, you will be given the opportunity to resubmit failed assignments. You
may resubmit failed assignments only once. Internet students will receive notification when they have failed an
assignment--they may then resubmit failed assignments on the web site. Internet students may view and print
results for failed assignments from the web site. Students who submit by mail will receive a failing result letter
and a new answer sheet for resubmission each failed assignment. COMPLETION CONFIRMATION
After successfully completing this course, you will receive a letter completion. ERRATA
Errata are used to correct minor errors or delete obsolete information in a course. Errata may also be used to
provide instructions to the student. If a course has an errata, it will be included as the first page(s) after the
front cover. Errata for all courses can be accessed and viewed/downloaded at:
STUDENT FEEDBACK QUESTIONS
We value your suggestions, questions, and
criticisms on our courses. If you would like to communicate with us regarding this course, we encourage you, if
possible, to use e-mail. If you write or fax, please use a copy the Student Comment form that follows this page.
For subject matter questions:
Phone: Comm: (850) 452-1001,
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FAX: (850) 452-1370
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For enrollment, shipping, grading, or
completion letter questions
Phone: Toll Free: 877-264-8583
FAX: (850) 452-1370
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NAVAL RESERVE RETIREMENT CREDIT
If you are
a member the Naval Reserve, you will receive retirement points if you are authorized to receive them under current
directives governing retirement Naval Reserve personnel. For Naval Reserve retirement, this course is evaluated at
5 points. (Refer to Administrative Procedures for Naval Reservists on Inactive Duty, BUPERSINST
more information about retirement points.)
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NETPDTC 1550/41 (Rev 4-00)
Introduction to Matter, Energy, and Direct Current,
to Alternating Current and Transformers, Introduction to Circuit Protection,
Control, and Measurement
, Introduction to Electrical Conductors, Wiring Techniques,
and Schematic Reading
, Introduction to Generators and Motors
Introduction to Electronic Emission, Tubes, and Power Supplies,
Introduction to Solid-State Devices and Power Supplies
Introduction to Amplifiers, Introduction to
Wave-Generation and Wave-Shaping Circuits
, Introduction to Wave Propagation, Transmission
Lines, and Antennas
, Microwave Principles,
, Introduction to Number Systems and Logic Circuits, Introduction
to Microelectronics, Principles of Synchros, Servos, and Gyros
Introduction to Test Equipment
, Radar Principles,
The Technician's Handbook,
Master Glossary, Test Methods and Practices,
Introduction to Digital Computers,
Magnetic Recording, Introduction to Fiber Optics