O

Octal Number system .

A number system based on powers of eight. Used in Computer System Analysis.

Octave

Interval between two sounds whose fundamental frequencies differ by a ratio of 2 to 1. 440 Hz. is one octave above 220 Hz.

Ohm

Unit of resistance symbolized by the Greek capital letter omega (W).

Ohmmeter

Device used to calculate electrical resistance.

Ohm's law

Ohm's law states that current in a resistance varies in direct proportion to voltage applied and inversely proportional to resistance. v=ir

Ohms per volt

Relates to a value of ohms per volt of full scale defection for a moving coil meter movement.

Operational amplifier

An operational amplifier, is usually referred to as an op-amp. These devices have very high gain. On the left are the input terminals and on the right side are output terminals. Used for signal amplification.

Oscillator

An electronic circuit that produces a continuous output waveform with only DC given to it.

Oscilloscope

An instrument used to see a signal graphically.

Output impedance

Impedance computed across the output terminals of a device without a load connected.

Output power

Amount of power a system can deliver to a load.

Overload Condition

Occurs when the load is greater than the system was designed to handle.