  An ultra-high-speed waveform digitizer prototype based on gigabit Ethernet
has been developed. The prototype is designed to read out signals of detectors
to realize the accurate measurement of various physical quantities for plasma
diagnostics. The prototype includes an ultra-high-speed analog-to-digital
converter (ADC) used to realize high speed digitization, a Xilinx Kintex-7
field-programmable gate array (FPGA) used for system configuration and digital
signal processing, a DDR3 memory bar for data storage, and a gigabit Ethernet
transceiver for interfacing with a computer. The sampling rate of the prototype
is up to 5Gsps with 10-b resolution. The features of the prototype are
described in detail.
