Difference between revisions of "How are measured Input Peak Levels"
(New page: =Input Peak Level= The measurement of the input levels to the IPAM based devices (Annuncicom, Instreamer and Exstreamer1000) is provided by the A/D Converter Quasi-Peak Detector Readout. ...) |
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=Input Peak Level= | =Input Peak Level= | ||
The measurement of the input levels to the IPAM based devices (Annuncicom, Instreamer and Exstreamer1000) is provided by the A/D Converter Quasi-Peak Detector Readout. | The measurement of the input audio levels to the IPAM based devices (Annuncicom, Instreamer and Exstreamer1000) is provided by the A/D Converter Quasi-Peak Detector Readout. | ||
In some application FW the value is provided as raw value while in other is displayed as | In some application FW the value is provided as raw value while in other is displayed as dBFS. The following conversion can be applied. | ||
The value range is from 0..32767 (32767 for full scale), linear, referring to full scale (7FFFhex, 32767 is 0dBFS). | The value range is from 0..32767 (32767 for full scale), linear, referring to full scale (7FFFhex, 32767 is 0dBFS). | ||
0000 | 0000 - 0% | ||
2000 | 2000 - 25% (-12dBFS) | ||
4000 | 4000 - 50% (-6dBFS) | ||
7FFF | 7FFF - 100% ( 0dBFS) | ||
NOTE: the measurement is performed at different time (10-20 msec) for left and right channel thus giving different result even if same audio values are applied on both. | |||
Revision as of 12:14, 19 August 2009
Input Peak Level
The measurement of the input audio levels to the IPAM based devices (Annuncicom, Instreamer and Exstreamer1000) is provided by the A/D Converter Quasi-Peak Detector Readout. In some application FW the value is provided as raw value while in other is displayed as dBFS. The following conversion can be applied. The value range is from 0..32767 (32767 for full scale), linear, referring to full scale (7FFFhex, 32767 is 0dBFS).
0000 - 0% 2000 - 25% (-12dBFS) 4000 - 50% (-6dBFS) 7FFF - 100% ( 0dBFS)
NOTE: the measurement is performed at different time (10-20 msec) for left and right channel thus giving different result even if same audio values are applied on both.
