The Lisun EMI-9KBS is a CISPR 16-1-1 compliant automatic EMI receiver covering 9 kHz to 300 MHz, supplied as a complete conducted and radiated emissions test system. It is the high-performance build of Lisun's 300 MHz tier, sharing the front-end design of the flagship EMI-9KC: an internal 30 dB attenuator, two-stage preselection (a 20-channel fixed preselector for 9 kHz–30 MHz plus a programmable auto-tracking preselector above 30 MHz), ±1 dB accuracy and a built-in LCD touchscreen. Housed in a fully enclosed shielded structure that suppresses instrument self-EMI, it serves compliance testing of LED lighting, switching power supplies, power tools, household appliances and IT equipment to standards including CISPR 16-1-1:2019, CISPR 15:2018, CISPR 14-1, CISPR 32, EN 55015, EN 55014-1, EN 55022/55032, FCC and GB 17743. Conducted measurements run through the supplied 50 Ω LISN; CISPR 15 radiated disturbance is measured via the supplied CDNE. The system ships with the receiver, LISN, CDNE, isolation transformer and coaxial cables, and can be operated manually or fully automatically from the touchscreen or the bundled Windows PC software (Win 7–11).