One of the most challenging elements of FM broadcasting is accurately setting up modulation levels. Schedule 1 h of the GURL specifies (h) Unwanted emissions shall not exceed the limits as follows; Unwanted Emission            Frequency Range                    Spectrum Analyser Limits – in the                         from carrier                              Resolution  Bandwidth resolution bandwidth -25 dBW                                   128 to 240 kHz                          Not to exceed 10 kHz* -35 … Continue reading Pira 75 Analyzer