Design and Characterization of the Engineering Model of the Spectrometer Onboard LuSEE-Night

The Lunar Surface Electromagnetics Explorer, LuSEE-Night, is a low frequency radio astronomy experiment which detects the cosmic Dark Ages signal on the radio-quiet farside of the Moon. The LuSEE-Night carries a radio frequency spectrometer consisting of a set of antennas, analog and digital processing electronics and will be launched in 2025 by the NASA Commercial Lunar Payload Services (CLPS). The initial stage of testing for the engineering model (EM) was performed for the analog amplification and filtering chain of the radio spectrometer. We confirmed that the EM of the preamplifier satisfies all the requirements for LuSEE-Night. The digital data acquisition, digital processing, command/control and telemetry are currently being developed with flight model hardware scheduled to be shipped to the integration site in early 2024.