DEVA Broadcast DB4005, Инструкция по техническому обслуживанию и эксплуатации

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LOUDNESS
This page shows the average program loudness measurements as defined by ITU BS.1770-4
and EBU R128 recommendations. The following measurements are available:
Momentary
– average program loudness measured over a 0.4s sliding time window, not gated;
Short-term – average program loudness measured over a 3s sliding time window, not gated;
Long-term
– average program loudness measured over a variable sliding time window, gated
as described in ITU BS.1770-4. The time window can be varied between 10s and 120s.
The page offers all the above measurements in two display forms – high refresh rate bar graphs
for displaying current values and a time graph for extended visualization over time.The user can
modify the processing and appearance of the measurement using the following settings:
Long-term
– a slider to select the length of the Long-term loudness measurement sliding time
window, from 10s to 120s;
[Reset Long-term] – a button to reset Long-term measurement;
Mode
– select between [ITU BS.1770-4] and [EBU R128] mode;
Span – select time graph time span;
Range
– select time graph measurement range.