Advanced Two-Band Controls - Orban OPTIMOD-FM 5500 Operation Manual

3-42
OPERATION ORBAN MODEL 5500
of high frequencies (due to high frequency limiting) and excessive distortion (due to
clipping).
2B 6-15 kHz Frequency Limiter sets the amount of additional gain reduction oc-
curring in 6-15 kHz band of the 2-band high frequency limiter. This extra gain reduc-
tion is triggered whenever high frequency energy would otherwise cause excessive
distortion in the final clipper. The algorithm uses an analysis of the activity in the fi-
nal clipper to make this determination.
Functionally, this control is a mix control that adds a HF limiter gain reduction signal
to higher of the two bands of the 2-band high frequency limiter. Higher settings
produce more extra HF limiting in this band. The control therefore allows you to
trade off reduced high frequency distortion against HF loss.
FINAL CLIP ("Final Clip Drive"): See page 3-34.
COMP DRV ("Composite Limiter Drive"): See page 3-34.
PARENT PRESET and LESS-MORE INDEX are read-only fields.
The 5500's front-panel LCD display does not show all of the parameters in a given
User Preset; only the PC Remote software can display the Advanced Controls that set
all the parameters. P P shows the preset that was edited to produce the
ARENT RESET
current User Preset. The L shows the Parent Preset's Less-More set-
-M I
ESS ORE NDEX
ting when it was edited. This information is needed because two different User Pre-
sets can appear to be the same when you view only the parameters that the 5500's
front panel exposes.
Please note that if a User Preset was created by in the PC Remote software by edit-
ing Advanced controls, an asterisk will appear in front of the displayed parent pre-
set. This asterisk means that you cannot duplicate a given user preset by starting
with its parent preset and then setting a target 5500's front panel controls to corre-
spond to the user preset you want to duplicate. The only way to duplicate such a
user preset accurately is via the PC Remote software's backup and restore features,
or by opening the preset in the PC Remote software and manually duplicating each
control setting you see.
The asterisk feature is not included in version 1.0 software.

Advanced Two-Band Controls

The following Two-Band controls are only accessible from the 5500 PC Remote soft-
ware.
2B Master Compression Threshold sets the level where gain reduction starts to
occur in the Master (above 200Hz) band of the Two-Band Compressor.
2B Bass Threshold determines the compression threshold of the bass band in the
Two-Band Compressor. It can be used to set the target spectral balance of the Two-