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High-Precision DDS Signal Generation & Frequency Counting: This professional-grade instrument utilises Direct Digital Synthesis (DDS) technology for exceptional frequency stability and low distortion. It offers a precise frequency range from 0.01Hz to 500kHz (sine wave) with a fine resolution of 0.01Hz, functioning as both a reliable signal generator and a frequency counter for accurate measurements. Comprehensive Library of 15 Standard Waveforms: Generate a versatile array of waveforms essential for testing and development, including sine, square, triangle, sawtooth, ECG, exponential rise/fall, Lorentz pulse, Gaussian pulse, sinc pulse, half-wave, full-wave, and noise. This variety supports a broad spectrum of electronic analysis and educational demonstrations. Portable Design with Flexible Dual Power Supply: Designed for portability, its compact form factor allows for easy use in the lab, classroom, or field. It features flexible dual power options, operating from a standard 5V DC adaptor (included) or an optional 3.7V lithium battery, providing convenience for both stationary and mobile applications. Essential Tool for Oscilloscope Calibration & Audio Testing: Ideal for technical calibration, its high accuracy makes it perfectly suited for oscilloscope sweep time calibration and probe adjustment. Furthermore, it serves as an excellent source for testing audio amplifiers, analysing frequency response, and measuring impulse characteristics in conjunction with an oscilloscope. User-Configured Output & Enhanced Control: Offers full control over your output signal with adjustable parameters including a maximum amplitude of ±10V (peak-to-peak), configurable DC offset, and a 50-ohm output impedance. All settings can be saved for repeated use, and a switchable output filter helps optimise waveform purity for both sine and pulse outputs.