The Keysight Technologies 33520B CAL DU is a highly versatile waveform generator part of the 33500B series, capable of producing signals up to 30 MHz for two channels. Featuring exclusive Trueform signal generation technology, it creates true point-by-point arbitrary waveforms with superior fidelity, flexibility, and signal integrity compared to traditional DDS generators. This anti-aliased digital sampling technique offers unmatched performance at an affordable price. It supports various operating modes, including continuous, modulate, frequency sweep, burst, and output gating, along with multiple modulation types such as AM, FM, PM, FSK, BPSK, PWM, and sum modulation. The device can generate sine, square, pulse, ramp, triangle, and Gaussian noise waveforms, with frequency ranges from microhertz to 30 MHz depending on the waveform. The front panel features an intuitive interface, and the instrument includes built-in web browsing, deep memory, and high-stability time base options for improved accuracy. Connectivity options include Ethernet, USB 2.0, GPIB, and support for SCPI-1999 programming language. The 4.3-inch color TFT display provides clear visualization, and the instrument is suitable for test and measurement applications with robust safety and compliance features.