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#1
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dBfs scales, EBU r68 or DIN ?
In our studio in the Netherlands we use a Yamaha O2r audio console, and
a Sony DVW500 digital betacam recorder. Recently we bought a AES/EBU DK-audio peakmeter, and the German DIN-PPM scale is our reference. In some situations we prefer the dBfs scale, but that seems not to be compatible with the German DIN-PPM scale, there is always a difference of 3dB. I think that the EBU dBfs standard scale is used for the digital betacam and the o2R. My conclusion, if you use the DIN PPM scale (RTW) and the EBU-r68 dBfs scale, you have a headroom left of only 6 dB in the digital betacam. Who knows the solution ? What's the standard scale for digital betacam ? Is the O2R standard always the EBU-r68 scale ? Hope to see some reactions. Jaap |
#2
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Jakeman wrote:
My conclusion, if you use the DIN PPM scale (RTW) and the EBU-r68 dBfs scale, you have a headroom left of only 6 dB in the digital betacam. You have as much headroom as you set. Who knows the solution ? What's the standard scale for digital betacam ? Standard in the US is for "zero tone" at -20 dbFS with a peak-reading meter. Average level is kept around that mark. This gives you plenty of slop room. Is the O2R standard always the EBU-r68 scale ? The 02R reads peak level with respect to full-scale, with a peak-hold of some duration. No averaging, no ballistics issues. The broadcast standards are all different. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
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Jakeman wrote:
My conclusion, if you use the DIN PPM scale (RTW) and the EBU-r68 dBfs scale, you have a headroom left of only 6 dB in the digital betacam. You have as much headroom as you set. Who knows the solution ? What's the standard scale for digital betacam ? Standard in the US is for "zero tone" at -20 dbFS with a peak-reading meter. Average level is kept around that mark. This gives you plenty of slop room. Is the O2R standard always the EBU-r68 scale ? The 02R reads peak level with respect to full-scale, with a peak-hold of some duration. No averaging, no ballistics issues. The broadcast standards are all different. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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