Grid Dip Meters

A Grid Dip Meter (GDM) or Grid Dip Oscillator (GDO) is a piece of electronic test equipment used in measurement and testing of radio frequency circuits, and is widely used by amateur radio operators for measuring the properties of resonant circuits, filters, and antennas. The GDM functions by measuring the resonant frequency of an LC resonant circuit, a Crystal/Ceramic resonator, and can be used for transmission line testing, as signal generators, and for measuring inductance and capacitance of components.