Comb generators create harmonic frequencies from which one frequency can be selected with a narrow filter and then filtered out. From an input signal, comb generators provide an effective method for generating frequency harmonics. Typically, these generators are used for frequency multipliers, frequency synthesizers, built-in-self-test (BIST) sources, and test equipment. Comb generators are a source for producing fundamental frequency components and multiple harmonic components. A comb generator generates a number of harmonics simultaneously, which look like a comb when viewed on a spectrum analyzer. Comb generators can produce harmonics of frequency step sizes up to the maximum range of operation. The output level of comb generators is fixed and has minimum variation. Comb generators can be battery operated in order to eliminate the need for interconnecting cables which could change a radiated signal. When a single monopole antenna is affixed atop comb generators, the antenna radiates reference signals. A tracking generator can be used with a spectrum analyzer to check the dynamic responses of frequency-sensitive devices, such as transmitter isolators, cavities, ring combiners, duplexers, and antenna systems.
Comb generators include frequency generators, harmonic frequency generators, harmonic generators, RF signal generators, and sweep generators. A frequency generator is a device that converts mechanical energy into electrical energy. The electrical energy may be direct current (DC) or alternating current (AC). A harmonic frequency generator is a device that generates a frequency that is a multiple (harmonic) of a lower frequency. A harmonic generator is sometimes referred to as a frequency multiplier. An RF generator is a device that generates radio frequencies, which are capable of inductively heating metals to high temperatures. An RF signal generator is designed for microwave and RF (radio frequency) applications. A sweep generator is an instrument that produces voltage, which continuously varies in frequency over a band of frequencies. Sweep generators are used to display frequency responses of circuit on oscilloscopes. Single sweep is an operating mode in which the sweep generator must be reset for each sweep. This is especially useful for obtaining single examples of a signal spectrum.