Test Equipment Guide.com: About Signal Generators

About Signal Generators

The signal generator is a staple of any electronic test procedure, and is the source of electrical signals for testing and measuring electronic devices, particular amplifiers. The two major types of signal generators are function generators and pulse generators.

Audio-frequency signal generators are used to test audio amplifiers to see how they perform at different frequencies. Amplification, frequency response, and distortion of the injected analog signal can be measured.

Radio-frequency (RF) signal generators are used to modulate the RF with an audio signal to simulate a radio station. In this way, the signal generator can measure the various parameters of a radio circuit for optimal tuning and peak performance. Both amplitude (AM) and frequency (FM) modulation can be used.

Most function generators have an RS-232 or IEEE-488 GPIB interface for connection to a PC. In addition, there are PC-based signal generators available as PCI and PXI cards as an alternative to workbench equipment.

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