The recycle pulse for the analyzer always comes from the function generator (oscillator) used to drive the testing stimulus; the function generator for the conditioning stimulus operates asynchronously with respect to the testing stimulus generator. A technician will then observe the signal at various points in the circuit using an oscilloscope, spectrum analyzer, or some other type of testing equipment. Most function generators allow you to generate sine, square or triangular AC function signals. The frequencies of such waveforms may be adjusted from a fraction of a hertz to several hundred kHz. The most common output waveforms are sine-waves, triangular waves, square waves, and sawtooth waves. A function generator is a signal source that has the capability of producing different types of waveforms as its output signal. The main purpose of a function generator is to send a signal into a circuit for testing purposes. Sine Wave Adjust Pins 1 and 12:. A common use is to test the response of circuits to a known input signal. ICL 8083 Function Generator 0.0001 Hz to 1 MHz. A signal or function generator is a device that can produce various patterns of voltage at a variety of frequencies and amplitudes.