Self-protection signal generator with reliable power protection - Built-in one-time quick-break fuse provides a safety safeguard against damage if the power supply is misconnected to 110V or 220V, helping to protect connected instruments during setup and testing. High quality calibrator for stable accuracy - Key components including DAC, reference voltage, and operational amplifiers use stable, temperature-tolerant specifications to improve temperature stability and long-term aging performance of the instrument. Practical signal tester with intuitive operation - Rational key layout with independent keys for each function, enabling easy and precise operation without mode confusion. Fast, responsive performance - Fast key speed with zero delay in response, ensuring quick control during measurements and testing. 2-3 practical use scenarios - Electronics lab calibration: Use the calibrator for accurate signal generation and measurement, while the protective fuse reduces the risk of equipment damage during setup with different mains voltages. - Bench-top instrument testing: The independent function keys allow rapid switching and testing of signal paths, enhancing workflow and reducing setup time. - Field maintenance and troubleshooting: The built-in protection and quick-response controls support safe, on-site signal generation and diagnostics under varying power conditions.