Oscillator:
An oscillator is an RF device that generates an output frequency.

Output:
The output of the oscillator is a signal with very specific characteristics. The two most common forms are sinusoidal and square wave.

Load:
Also called fan-out, load is specified as the number of devices the oscillator can support while still maintaining its signal integrity.

Logic:
The type of active device family that the output is designed to interface with.

Logic "1":
The "high" level which the output must meet to interface properly with the load.

Logic "0":
The "low" level which the output must meet to interface properly with the load.

Rise Time:
The time it takes to transition from a logic "0" to a logic "1".

Fall Time:
The time it takes to transition from a logic "1" to a logic "0".

Symmetry:
Also called duty cycle. The ratio of the amount of time the output signal is logic "1" compared to the time it is logic "0".

Enable / Disable:
A feature which allows the output of the oscillator to be shut off.

Thri-state:
A feature similar to enable / disable, however, when the output is shut off the device behaves like a high impedance.

Voltage Control:
A feature where an input voltage is used to adjust the output frequency of the oscillator.