## Electronics (Mike Jaroch)

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### O

#### OCTAL NUMBER SYSTEM

A number system based on powers of eight. This system is used extensively in computer work [13].

 Keyword(s): OCTAL NUMBER SYSTEM

#### OFF-LINE TEST EQUIPMENT

Equipment that tests and isolates faults in modules or assemblies removed from systems [14].

 Keyword(s): OFF-LINE TEST EQUIPMENT

#### OHM

The unit of electrical resistance. That value of electrical resistance through which a constant potential difference of 1 volt across the resistance will maintain a current flow of 1 ampere through the resistance [1].

 Keyword(s): OHM

#### OHM'S LAW

The current in an electrical circuit is directly proportional to the electromotive force in the circuit. The most common form of the law is E = IR, where E is the electromotive force or voltage across the circuit, I is the current flowing in the circuit, and R is the resistance of the circuit [1].

 Keyword(s): OHM'S LAW

#### OHMIC VALUE

Resistance in ohms [1].
 Keyword(s): OHMIC VALUE

#### OHMMETER

A meter used to measure resistance [3] [16].
 Keyword(s): OHMMETER

#### OHMS PER SQUARE

The resistance of any square area of thin film resistive material as measured
between two parallel sides [14].

 Keyword(s): OHMS PER SQUARE

#### OILCAN TUBE

A type of planar tube, similar to the lighthouse tube, which has cooling fins. The oilcan tube is designed to handle large amounts of power at uhf frequencies [6].

 Keyword(s): OILCAN TUBE

#### OMNIDIRECTIONAL ANTENNA

An antenna that radiates and receives equally in all directions (nondirectional) [10] [18].

 Keyword(s): OMNIDIRECTIONAL ANTENNA

#### ON-LINE TEST EQUIPMENT

Continuously monitors the performance of electronic systems [14].
 Keyword(s): ON-LINE TEST EQUIPMENT

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