  Breakthrough Listen is a ten-year initiative to search for signatures of
technologies created by extraterrestrial civilizations at radio and optical
wavelengths. Here, we detail the digital data recording system deployed for
Breakthrough Listen observations at the 64-m aperture CSIRO Parkes Telescope in
New South Wales, Australia. The recording system currently implements two
recording modes: a dual-polarization, 1.125 GHz bandwidth mode for single beam
observations, and a 26-input, 308-MHz bandwidth mode for the 21-cm multibeam
receiver. The system is also designed to support a 3 GHz single-beam mode for
the forthcoming Parkes ultra-wideband feed. In this paper, we present details
of the system architecture, provide an overview of hardware and software, and
present initial performance results.
