... Meter PERFORMANCE SPECIFICATIONS Standard: Complies with IEC 61672 class 1 Freq. Range: 10 Hz ~ 16 kHz Meas ... L50, L90, L95, SD, LAE, E, Ld, Ln, Ldn, Tm 1/1 Oct Real-time Analysis Software (S00202 available): Filter ... plug DC Output : 20mV/dB. Output Impedance: 1 kΩ Connector: DB-9 plug RS232 Interface: To ... sound level selected , Lmax or Leq over 1 second, also to printer for printing USB Interface ...