This chapter provides an overview of the Anritsu MS27201A RSM. It describes the instrument hardware features, general system settings and instrument configurations, and the connector panels. The Remote Spectrum Monitor uses a remote PC for the user interface. The interface menus can vary depending on the current measurement configuration, installed options, and selected instrument function. For detailed information on the instrument’s user interface and functions, refer to spectrum analyzer measurement guide (PN: 10580-00447).