physics

Joint Electronics Type Designation System

Joint Electronics Type Designation System is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Joint Electronics Type Designation System rather than just read about it. In short: The Joint Electronics Type Designation System (JETDS), which was previously known as the Joint Army-Navy Nomenclature System (AN System. JAN) and the Joint Communications-Electronics Nomenclature System, is a method developed by the U.S.

Key takeaways

Joint Electronics Type Designation System belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Joint Electronics Type Designation System to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Joint Electronics Type Designation System from memory before moving on to harder problems.

Reference excerpt

The Joint Electronics Type Designation System (JETDS), which was previously known as the Joint Army-Navy Nomenclature System (AN System. JAN) and the Joint Communications-Electronics Nomenclature System, is a method developed by the U.S. War Department during World War II for assigning an unclassified designator to electronic equipment. In 1957, the JETDS was formalized in MIL-STD-196. Computer software and commercial unmodified electronics for which the manufacturer maintains design control are not covered.

Applicability Electronic material, from a military point of view, generally includes those electronic devices employed in data processing, detection and tracking (underwater, sea, land-based, air and space), recognition and identification, communications, aids to navigation, weapons control and evaluation, flight control, and electronics countermeasures. The JETDS applies to equipment throughout the DoD and select NATO allies today. Nomenclature is assigned to:

Electronic material of military design Commercial electronic material that has been modified for military use and requires military identification and design control Electronic material which is intended for use by other Federal agencies or other governments that participate in the nomenclature system. This system is separate from the "M" designation used in the Army Nomenclature System (MIL-STD-1464A).

Organization Items are given an Item Level which describes their hierarchy

Basic Structure The core of the JETDS system is the combination of a Type Designation with an Item Name to specify a particular item. For example:

With the AN/PEQ-2A Infrared Illuminator, the "AN/PEQ-2A" is the Type Designation while the Item Name Code (INC) 26086 "Illuminator, Infrared" is the Item Name.

Type Designation The type designation is a unique series of letters and numbers which specifies an item. There are three basic forms of type designator used:

Type designators for definitive Systems, Subsystems, Centers, Central, and Sets (e.g. AN/SPY-1) Type designators for definitive Groups (e.g. OK-198/G) Type designators for definitive Units (e.g. R-1641A/GSQ)

Item Name The Type Designation is used in conjunction with an approved Item Name drawn from the H-6 Item Name Directory. For example:

Item Name Code (INC) 48198 from the H-6 Item Name Directory refers to "Terminal, Satellite Communications". This item name is used in the item officially designated as AN/FSC-78(V) Satellite Communications Terminal.

Type Designation (Systems, Subsystems, Centers, Central, Sets) The type designation used to specify Systems, Subsystems, Centers, Central, and Sets is made up of a prefix AN/, three type designation indicator letters, a hyphen, and a type designation number. The AN prefix signifies Army-Navy. The three type designation letters (chosen from the table below) specify where the equipment is used, what the equipment is, and what its purpose is. The type designation number helps specify the exact item; subsequent items with the same Installation/Type/Purpose are numbered sequentially (i.e. the next item developed after the AN/PRC-34 would be the AN/PRC-35). For example:

AN/PRC-77 is made up of AN/ Army-Navy PRC signifies Portable Radio used for two way Communications -77 the type designation number

* Additional info on Installation indicators:

F is used for equipment installed in fixed ground (non-moveable) installations G is used for equipment which can be installed in two or more ground-based installation types M is used for equipment which is installed in a vehicle and is operated while the vehicle is in motion. M is only used when the vehicle's sole function is to house, transport, and operate the equipment. The vehicle must be "part of" the equipment T is used for ground-based equipment that is designed to be moved from place to place and the equipment is not covered by the installation indicators G, M, P, U, V. The equipment is not capable of being operated while in transit. U is used for equipment which can be installed in two or more types of installation indicators (e.g. a particular equipment that can be ground-based or airborne). U can also be used for equipment which has components in more than one installation class (e.g. a particular equipment that has one component that is airborne and another component that is ground-based). V is used for equipment which is installed in a vehicle whose main purpose is not to carry the electronic equipment. For example, the radio installed in a tank would use V as the tank's primary purpose is not just to carry the radio. The equipment must be usable while the vehicle is traveling. W is used for equipment that is installed in a vehicle which can be on the water's surface or operate below the surface. Z is used for equipment installed in a vehicle which can be piloted or pilotless ** Additional info on Type of Equipment indicators:

P is used for the following types of equipment: Radar equipment Beacons which function with radar equipment Electronic recognition and identification systems Pulse-type navigational systems

Type Designation (Group) The type designation used to specify Groups (assemblies that are used in conjunction with others to function) is made up of a two letter group indicator (from the table below), followed by a dash, a group number, followed by a slash, and 1-3 letters specifying the equipment it is "part of" or "used with" (see Table 1). If the group is unique and only "part of" or "used with" one particular equipment, that equipment may be specified. If the group may be used with multiple different items, then it is more appropriate to designate it more generally. For example:

OE-162/ARC would refer to an antenna group used with aircraft-based radio communications equipment (i.e. AN/ARC-x equipment) If the control group OK-414 is only used with AN/TPN-30 (and not used with any other items), then it can be termed OK-414/TPN-30 If the control group OK-414 can be used with various different ground-transportable radar navigational aids (i.e. AN/TPN-x equipment), then it should be termed OK-414/TPN If the console OJ-301 can be used with various different water-based radars (i.e. AN/SP -x equipment), it should be termed OJ-301/SP If the receiver group OR-221 can be used with various different general utility items (i.e. AN/U -x equipment), it should be termed OR-221/U

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Joint Electronics Type Designation System

Start with the simplest possible case. Write down what Joint Electronics Type Designation System claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Joint Electronics Type Designation System before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Joint Electronics Type Designation System ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Joint Electronics Type Designation System

In research: Joint Electronics Type Designation System appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Joint Electronics Type Designation System in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Joint Electronics Type Designation System is common in secondary-school and first-year university syllabi. It links to neighbouring topics Encodings, Equipment of the United States Air Force, History of radio in the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Joint Electronics Type Designation System outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Joint Electronics Type Designation System in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Joint Electronics Type Designation System means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Joint Electronics Type Designation System out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Joint Electronics Type Designation System in simple terms?

Why does Joint Electronics Type Designation System matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Joint Electronics Type Designation System?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Joint Electronics Type Designation System.