The minimum technical requirements for the Cellular Base Station and Repeater System to be used in the Public Mobile Radio Communication System have been defined in this specification.

The IMDA TS CBS Issue 1 Rev 2 has been replaced by the IMDA TS CBS Issue 1 Rev 3 and a few revisions include: Inclusion of current harmonics test methods of IEC/EN 61000-3-2 or IEC/EN 61000-3-12 Inclusion of voltage fluctuations test methods of IEC/EN 61000-3-3 or IEC/EN 61000-3-11 tests are to be done on all AC power ports regardless of cable lengths, and that tests are to be done on signal, wired, controlled, and DC power ports that have cables longer than 3m; Providing better clarity to requirements for different RAT by streamlining the requirement tables and separating them Providing requirements for NR based on the base station types (BS Type 1C, Type 1H, Type 1-0 and Type 2-0)

Source:

https://www.imda.gov.sg/-/media/imda/files/regulation-licensing-and-consultations/ict-standards/telecommunication-standards/radio-comms/imda-ts-cbs.pdf

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