Question about rigol DG1022 function generator

AI Thread Summary
The Rigol DG1022 function generator emits a faint high-pitched sound when the voltage exceeds 2V peak to peak, which is a common occurrence in digital function generators. This sound, around 15 kHz, does not change with the output frequency and may be attributed to hysteresis in the transformer of the switching power supply. As long as the device operates correctly without overheating and produces accurate output waveforms, it is generally not a cause for concern. Users are advised to monitor the generator's performance but can typically consider this noise normal. Overall, the sound does not indicate a malfunction if the generator meets its specifications.
JerryG
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I just bought a new rigol DG1022 function generator and I noticed that when I turn the voltage higher than 2V peak to peak, the FG emits a faint high pitched sound. It's barely audible; maybe around 15 kHz. Is that normal for a digital function generator, or does that mean that something is wrong with it? Oh, and the pitch of the sound does not vary with the output frequency.
 
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Maybe just hearing hysteresis in the transformer of the switching power supply? Those are often run at high frequencies. If nothing is getting too hot and the output waveforms are still correct at the rated load, I wouldn't worry about it.
 
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