Boonton Radio Corporation, founded in 1934, manufactured test instruments.
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance.
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
Frequency is the number of occurrences of a repeating event per unit of time.
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
The Hewlett-Packard Company (commonly referred to as HP) or shortened to Hewlett-Packard was an American multinational information technology company headquartered in Palo Alto, California.
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.