The meter types 478-series of audio level measuring instruments is member of a family of instruments designed to take heritage of the previous series of the 477-series PPM’s. The prime function of the meter is to measure peak level of an analog audio signal. The use of a high quality, 24 bit AD converter and digital signal processing assures uncompromising accuracy and stability. Based upon one of todays’s most powerful DSP’s it offers all of its predecessors appreciated qualities like a bright, high definition bar graph display with a multitude of display modes. It facilitates both measurements with 10/5ms integration time in accordance with IEC 268-10 and measurements with ”zero” integration time. Analog Stereo Peak Program Meter.

The 478-100 family Additionally a spot indication may be superimposed on the normal reading, indicating the absolute level with reference to digital FS. This enables the sound engineer, working in a mixed analog and digital enviroment, to make a direct comparision between signals. Numerous other display functions are available including peak hold, memory, zoom, and an optional compatibility / phase meter. The instrument is housed in a ruggedized aluminium cabinet with a high contrast, non glare scale.