The Keysight 33520B CAL D is a waveform generator from the 33500B series, offering a bandwidth of up to 30 MHz and dual channels. Featuring Trueform technology, it produces high-fidelity, true point-by-point arbitrary waveforms with low jitter, enhanced signal integrity, and greater resolution compared to traditional DDS generators. The generator supports various operating modes such as continuous, modulation, frequency sweep, burst, and output gating, with modulation types including AM, FM, PM, FSK, BPSK, PWM, and sum modulation. It can generate sine, square, pulse, ramp, triangle, and Gaussian noise waveforms across a wide frequency range, as well as PRBS and DC signals. The unit is equipped with an intuitive touchscreen interface, built-in web browser, high-stability time base options, and multiple connectivity options including Ethernet, USB, and GPIB. Its compliance with international safety standards and advanced features make it suitable for precise testing and measurement applications.