Output: Square wave signal at the output terminal; amplitude is approximately equal to the input voltage. Duty cycle: Not adjustable; the duty cycle remains stable as the frequency is adjusted, typically between 50% and 65%. Frequency control: Frequency is adjusted via a builtin multiturn potentiometer. L version has an adjustment range of 0.8 Hz to 60 Hz. Key benefits: Simple square wave source with output amplitude close to the input, enabling direct interfacing with standard signal levels. Stable duty cycle during frequency changes, reducing timing variation in test setups. Fine frequency adjustment with a builtin multiturn potentiometer for practical lab use. Specifications and performance: Output type: Square wave Amplitude: Approximately equal to input voltage Duty cycle: Not adjustable; stable in the 50%–65% range during frequency changes Frequency adjustment: Builtin multiturn potentiometer Frequency range (L version): 0.8 Hz to 60 Hz Potential applications: Microcontroller timing tests and digital input simulations Lab bench experiments requiring a repeatable square wave reference Timing verification and signal integrity checks for digital circuits Compatibility and usage notes: Designed for applications that require a square wave output with amplitude closely matching the input signal. Frequency is useradjustable via the internal potentiometer; duty cycle remains essentially constant across the frequency range.