3-30
OPERATION ORBAN Model 8400
You have somewhat more leeway than you do in older Orban FM processors
like the 8200 because the 8400’s new distortion control will work to help
prevent audible speech distortion even when the phase rotator is switched
out.
AGC Controls
The AGC is common to the two-band and Five-Band structures.
Five of the AGC controls are common to the Intermediate Modify and Advanced Modify
screens, with additional AGC controls available in the Advance Modify screen, as noted
in the following table.
AGC Controls
Intermediate Names Advanced Names Range
AGC On/Off AGC Off/On
Drive Drive –10 ... 25 dB
Release Release 0.5, 1.0, 1.5, 2 … 20 dB/S
Gate Thresh Gate Thresh Off, –44 ... –15 dB
Bass Coupling Bass Coupl 0-100 %
--- MaxDeltaGR 0 … 24 dB, Off
--- Window Size –25 … 0 dB
--- Window Rel 0.5 … 20 dB
--- AGC Matrix L/R, sum/dif
--- AGC Ratio
∞1, 4:1, 3:1, 2:1
--- Bass Thresh –12.0 … 2.5 dB
--- Idle Gain dB –10 … +10 dB
--- AGC Bass Attack 1 … 10
--- AGC Master Attack 0.2 .. 6
--- AGC Bass Release 1 … 10 dB/sec
--- Master Delta Thresh –6 … +6 dB
--- Bass Delta Thresh –6 … +6 dB
--- AGC Crossover Allpass, LiNoDly, Linear
Table 3-4: AGC Controls
These controls are explained in detail below.
Each Factory Preset has a
Less/More control that adjusts on-air loudness by altering the
amount of processing.
Less/More simultaneously adjusts all of the processing controls to
optimize the trade-offs between unwanted side effects.
If you wish, you may adjust the Advanced Modify parameters to your own taste. Always
start with
Less/More to get as close to your desired sound as possible. Then edit the Ad-
vanced Modify parameters using the Advanced Modify screen, and save those edits to a
User Preset.
AGC On/Off
control activates or defeats the AGC.
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