Optimod-Surround 8685 V1.0 Operating Manual - Orban

2-34
INSTALLATION ORBAN MODEL 8685
13. Set surround and 2.0 global Dialnorm values. (Very important!)
See step 10 on page 2-14.
The global Dialnorm settings are in INPUT/OUTPUT > UTILITIES.
• You can use the 8685’s RS-485 serial ports to convey surround DIALNORM to the
Dolby-Encoder automatically.
• If your 8685 is equipped with the optional HD-SDI module, you can use it as a
metadata source. The metadata in the HD-SD stream must be embedded as
VANC data per SMPTE 2020-2-2008 (Method-A) or SMPTE 2020-3-2008
(Method-B). Select the metadata source with the METADATA SOURCE control,
which is located in INPUT/OUTPUT>INPUT ROUTING (INPUT/OUTPUT 4).
• If your 8685 is equipped with the optional Dolby-E decoder, you can use
metadata embedded in the Dolby-E input stream as a metadata source.
See Conveying Metadata on page 2-15 and Conveying and Re-authoring Dolby
Metadata on page 6-3.
14. Set the processing’s channel mode controls.
Note: Unlike Orban’s earlier 8585 processor, all processors (one 7.1 processor and
four 2.0 processors) in the 8685 are active simultaneously. There is no control to
turn them on or off because none is needed. The only thing the installer must do
is to make sure that no signal is accidentally feeding the Lb and Rb channels of
the surround processing if it is processing a 5.1-channel source (step 15 on page
2-35).
A) LOCATE to INPUT/OUTPUT > CHANNEL MODE.
B) For each 2.0 processor, set the 2.0 PROC MODE to STEREO or DUAL MONO.
DUAL MONO mode allows the 2.0 processing to handle two independent
mono (1.0) signals. It removes all stereo coupling and activates a separate,
independent loudness controller and loudness level meter for each
channel. However, you cannot set the processing parameters independently
for each mono channel. Moreover, the active 2.0 DIALNORM value is
applied to both mono channels equally.
STEREO mode allows you to couple or uncouple the channels in the AGC
and multiband compressor/limiter to any extent you wish via the MAX
DELTA GR controls in Advanced Control. However, in STEREO mode there
is only one loudness controller and Loudness Level meter. These work on
the r.m.s. sum of the two channels.
You can also set the 2.0 processing mode by first saving a Setup with the
2.0 PROC MODE control set as desired. Then recall the Setup from a GPI input,
the 8685’s clock-based automation, the 8685’s front panel, or PC
Remote. You can also change the 2.0 processing mode by reading channel
status data in the AES3id input feeding the 2.0 processing (see step
(B) on page 2-18.) A command from any of these sources overwrites the
current stereo/mono status.