dBfs scales, EBU r68 or DIN ?

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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

 

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Archived from groups: rec.audio.pro (More info?)

Jakeman <jaap433@hotmail.com> 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."