Phase-locked loop (PLL) frequency synthesizers are electronic devices that produce frequencies coherent to a reference frequency

Data acquisition output modules or cards transfer amplified, conditioned, or digitized signals

Frequency-to-voltage converters accept a signal and convert its frequency to a corresponding analog voltage level

Voltage-to-frequency converters accept a voltage signal and convert its analog level to a signal with a corresponding frequency

RF frequency multipliers are nonlinear devices that produce an output signal with a frequency that is larger than the frequency of a corresponding input signal by a predetermined factor

Frequency meters are instruments that provide analog outputs as frequencies that vary as a function of the applied input.

Frequency counters are digital indicating meters for accurate measurement and display of square wave and pulse input signals