In this thesis we tried to develop a measurement equipment which has gone to oblivion. In many places it was substituted by cheap spectrum analysers which have integrated both frequency counter and amplitude meter. Being big and heavy box, spectrum analyser is not always practical as we often only need lightweight and efficient instrument for measuring frequency. Besides, old-fashioned design of high-frequency counters with slow prescaler, unsuitable input sensitivity, unsuitable input impedance and unsuitable probes results in impractical instrument. This thesis describes the state-of-the-art frequency counter and amplitude meter. It's main characteristics are high input sensitivity, broad frequency range and high speed measurement of frequency as well as amplitude.