RFI Monitor System Design for the Dominion Radio Astrophysical Observatory

In this paper we present the system design for the radio frequency interference monitor at the Dominion Radio Astrophysical Observatory (DRAO). Although the design is focused on requirements generated from the needs of local telescopes and personnel, we have made efforts to ensure that the design is adaptable to the needs of other radio observatories. We describe the design as it relates to the primary use case of calibrated full-bandwidth, full-sensitivity spectrum monitoring and scene analysis from 350 MHz to 1800 MHz at the DRAO site. We also present measured results that outline the progress made on system implementation during 2020.