Final Clip Drive Control - Orban OPTIMOD-FM 8200 Operating Manual

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MANUAL ADDENDUM

Final Clip Drive Control

Version 3.00 extends the range of the
end of its range. This means that you can turn down the clipping by 3dB by comparison
to earlier versions of 8200 software. The purpose of this extension is to allow users in
ITU countries to comply with the requirements of ITU-R Recommendation BS.412-7 if
they are required to do so by the regulatory authority in their country.
Based on measurements with a wide variety of program material using the Rundfunk-
Betriebstechnik, GMBH Hubmess System MPX-EBENE (a modulation analyzer), we
have developed the following formula for ensuring compliance. First, you must start with
one of the basic 2-Band or 5-Band factory presets with
then edit the preset (using
following settings:
Preset
DA 5B SLOW
DB 5B-MEDIUM SLOW
DC 5B-MEDIUM FAST
DD 5B-FAST
CA 2B-NOR PROCESSED
To ensure that you meet the requirements, do not increase the settings of these controls
beyond the settings provided in
MULTI-BAND DRIVE .
Note: The BB (Purist Classical) and BA (Purist Processed) presets will comply with a
CLIPPING setting of –2 or lower. There is no need to reset the
control when using these presets.
The Protection Limiter Structure will not comply and cannot be adjusted to do so.
However, you can use the BB (Purist Classical) preset instead and set its
control to –2.
If you want to use any of the new presets in Version 3.00, you should follow a similar
formula. Set them for
LESS-MORE
1.5, except for "dense" presets (
CLIP DRIVE = –2.5). While we have not specifically measured all of the Version 3.00
presets using this formula and therefore cannot guarantee compliance, we believe that
compliance is nevertheless very likely.
FINAL CLIP DRIVE
FULL CONTROL ) to set the
LESS-MORE
1.0
1.0
1.0
1.0
1.0
LESS-MORE = 1.0:
= 1.0. Then edit the
FINAL CLIP DRIVE
control by 3dB at the lower
at 1.0. You must
LESS-MORE
FINAL CLIP DRIVE
Final Clip Drive
–1.5
–1.5
–3.0
–2.5
–1.5
RELEASE TIME , CLIPPING
FINAL CLIP DRIVE
FINAL CLIP DRIVE
= –3.0) and News or Sports (
Orban
to the
, and
CLIPPING
control for –
FINAL