PPM solutions from BCD Audio

BCD Audio's involvement with PPMs started in 1995 with the BCD 950429 stereo drive card. This has balanced inputs and precision rectification which passed the level to a micro, where calibration, attack/decay, overload and sum/difference switching is implemented. The drive to the meter is by pulse width modulation (PWM) as the micro did [ read more ]

PPM solutions from BCD Audio2022-12-21T15:41:57+00:00

PPM History

The PPM meter, with the black background and the white scale from 1 to 7 was a standard in UK Broadcast for decades. It was used to establish audio transmission levels and line up. Each scale number from 1 to 7 represents 4dB, with PPM4 corresponding to 0dBU and PPM6 corresponding to 8dBU. [ read more ]

PPM History2022-12-13T19:42:43+00:00


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