Why you need this signal source Provides a high-precision, stable-frequency DDS output to ensure accurate timing and repeatable signals for oscilloscope calibration and waveform verification. Produces clean rectangular pulses and adjustable waveforms that simplify probe compensation and attenuator verification without guesswork. Includes a selectable filter that reduces unwanted harmonics on sine and pulse outputs, improving measurement accuracy. Key benefits and problem solving Accurate scan-time calibration: DDS stability and precision make it suitable for calibrating oscilloscope scan-time and timebase factors reliably. Simple probe and attenuator adjustment: Rectangular wave output is ideal for setting probe pulse response and checking attenuator behavior with clear rise/fall transitions. Cleaner measurements: The on/off filter option lets you suppress high-frequency noise or harmonics on sine and pulse outputs when needed. Main functions and performance Waveform outputs: Sine, rectangular (pulse), triangular, and sawtooth waveforms are available for general purpose testing and signal generation. DDS-based frequency stability: Low jitter and stable frequency sourcing suitable for repeated calibration and test procedures. Selectable filter: A switchable filter tailored for the sine and pulse outputs for improved spectral purity when required. Compatibility and applications Designed for use with oscilloscopes, probe compensation tools, and general electronic test benches. Works with oscilloscope attenuators and standard probe setups to validate pulse shapes and timing. Practical use scenarios 1. Oscilloscope calibration — Use the DDS sine output to verify and adjust the oscilloscope scan-time and timebase accuracy for precise time-domain measurements. 2. Probe compensation and attenuator testing — Apply the rectangular wave to set probe compensation networks and to confirm the correct operation of attenuators across edges and pulse amplitudes. 3. General waveform testing — Generate sine, triangular, sawtooth, or square/pulse signals for circuit functional checks, filter testing, or education lab exercises. Notes on operation Main outputs cover sine, rectangular (pulse), triangular, and sawtooth waveforms. The filter can be turned on or off to match measurement needs for sine and pulse outputs. Intended for integration into test benches where waveform stability and clean pulse shapes are required.