ABSTRACT
The PPM (Peak Program Meter) is rather level oriented and thus works significantly faster than the VU meter. The instrument’s time constant, the integration time, that is, the time it takes the reading to reach a point 2 dB below the reference indication, is 5 ms. In earlier standards, the integration time was defined as 10 ms. However, this is rather a question of definition. It still takes 10 ms to reach a reading 1 dB below the reference indication. In any event, the short integration time ensures that program peaks of short duration primarily can be read at (nearly) the correct level.
