TEST & MEASUREMENT Signal Generators: Does Analogue


or Digital Make a Difference? Andrew Herrera, product manager, Keysight


F


undamentally, a signal generator acts as the conductor of electronic testing, orchestrating a variety of signals to breathe life into circuits and systems for analysis. It produces controlled, precise waveforms, whether sine waves, square waves or complex modulations, to test, verify and troubleshoot electrical setups. Without signal generators, you would lack a reliable means to simulate circuit responses to various inputs.  system, debugging a digital communication channel or developing advanced radar technology; in each case, a signal generator  from audio frequencies to digital patterns and radio waves. From basic component testing  signal generator is essential for  development.


Grasping a signal generator’s key  understanding the ingredients in a recipe; attaining the desired outcome is only possible


34 MARCH 2025 | ELECTRONICS FOR ENGINEERS


with the correct components. With so many options, it is important to understand which signal generator is best to achieve a project’s goal.


Signal Generator Important Features


 provide reliability and precision that can  instruments undergo extensive testing  remain accurate and stable. It is critical that  avoid incurring delays and escalating costs. Understanding a signal generator’s key characteristics and features is essential. An analogue signal generator produces continuous waveforms, while a digital option creates waveforms using discrete values. To select the right solution, you must understand the different features and applications. Frequency range: This is essential for determining the scope of tasks your signal generator can handle, encompassing both


 wider frequency range allows the instrument generator to be used in various applications, making it more versatile. Amplitude Range: A broader amplitude range enhances versatility and precision, enabling  of different applications and ensure accurate and reliable test results. Modulation capabilities: To accurately  generators must accommodate various modulation techniques, from AM and FM to more sophisticated digital modulations. Output power:  output power allows you to operate the system or circuit at different levels, which is crucial for stress tests and other assessments. Resolution: Greater resolution leads to more precise test outcomes, enabling you to analyse and comprehend the system or circuit in detail. Waveform Format: Different applications  sine, square and triangle waves, so it is vital to


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