Which devices in signal generators are responsible for regulating the output signal voltage?

In signal generators, attenuators are crucial for regulating the output signal voltage. An attenuator reduces the power of a signal without distorting its waveform, allowing for precise control over the amplitude of the output signal. This function is essential when generating various signal levels for testing and calibration, enabling the technician to achieve the desired voltage output tailored to specific requirements.

Attenuators can be either passive components, which do not require power to operate and reduce the signal through resistive methods, or active components that can adjust the signal dynamically. Their primary role is to ensure that the signal remains within acceptable levels for the system being tested, preventing damage to sensitive components that might occur if excessively high signal voltages are applied.

Other devices listed, such as transformers, amplifiers, and rectifiers, serve different purposes. Transformers are mainly used for voltage transformation and isolation, amplifiers increase signal power or voltage but are not primarily used for precise attenuation, and rectifiers convert AC signals to DC. While each of these components plays an essential role in signal processing, it is the attenuator that specifically addresses the regulation of output signal voltage in this context.