... monitors menu :And Ld, Ln, Ldn Real-time spectrumanalysisFulfils standards:, IEC 61260 Class 1Filter type: Digital band pass filterMeasuring Parameters: Lfmi, Lfmeq,1s ... noise(S6291 00202) Filters Center. Frequency: 16 Hz~16 kHz.Real-time 1/1 OCTspectrum analysis1/3 OCT spectrum analysis software(S6291 ... .75kHz, 9375 Hz, 4687 Hz, 2344 Hz, 1172 Hz, 586Hz.4. Bandwidth of each line: 93.75 Hz, 46.875Hz, 23 ...