High performance four-channel programmable linear DC regulated power supply; 4.3-inch color display, real-time display voltage/current/power value and waveform, which makes the output status and trend clear at a glance; 1mV/1mA high resolution, < 350 μVrms / 2 mVpp low ripple noise, 245W high output power, ≤50μs fast transient response; Four channels are electrically isolated and each channel is continuously adjustable; Over voltage, over current, over temperature, short circuit protection functions; Timing and delay output, constant voltage, constant current function; Four working modes: independent, series, parallel, tracking; Digital keyboard input and storage, keyboard lock function; Rich interface configurations: USB HOST, USB DEVICE, digital I/O interface, LAN, RS232/485, GPIB.  1.Four-channel programmable linear DC regulated power supply, 245W output power, electrical isolation between channels, four channels continuously adjustable.  2. 4.3-inch color display, real-time display voltage/current/power values and waveform, which makes the output status and trend clear at a glance.  3.High resolution: 1 mV, 1 mA.  4. Low ripple noise: < 350 μVrms / 2 mVpp.  5.Transient response time: ≤50μs.  6. Over voltage/over current/over temperature/short circuit protection functions. The over voltage and over current parameters can be flexibly set to achieve effective load protection.  7.Intelligent temperature control fan automatically adjusts the speed, effectively reducing fan noise.  8.The use of color and numeric identifiers makes it easy for users to identify information relevant to the output of a particular channel.  9. Provide 10 groups of storage for sequence/delay/record/panel condition settings.  10.List function. By editing the single-step voltage, current, time, list function can generate a variety of complex sequences to meet the complicated test requirements.  11.Recorder function. The recorder can record the output voltage, current and power, and display them by graph.  12.Keyboard lock function to prevent misoperation.  13. Support SCPI remote command control.  14. Support U disk (FAT32 format, Flash) storage, one-click screenshot and data recording function.  15. Standard configuration ports: USB HOST, USB DEVICE, LAN, digital I/O interface, RS232/RS485 (HDP4324B/HDP4424B), GPIB (HDP4324H/HDP4424H).