Operating instructions

OPTIMOD-AM DIGITAL OPERATION
3-37
AMOUNT to 0.
L-R / L+R Ratio Limit
sets the maximum amount of enhancement to prevent multi-
path distortion. However, if the original program material exceeds this limit with no
enhancement, the enhancer will not reduce it.
Diffusion
applies only to the DELAY enhancer. This control determines the amount
of delayed L–R added to the original signal.
Style
sets one of two stereo enhancer types: 222 or DELAY.
Depth
sets the delay in the delay line. It applies only to the DELAY enhancer.
AGC Controls
The AGC is common to the analog AM and digital radio processing chains.
Five of the AGC controls are common to the Full Modify and Advanced Modify
screens, with additional AGC controls available in the Advance Modify screen, as
noted in the following table. (Note that “advanced” controls are accessible only
from 9400 PC Remote software.) These controls are explained in detail below.
AGC
(“AGC Off / On”) control activates or defeats the AGC.
It is usually used to defeat the AGC when you want to create a preset with minimal
processing. The AGC is also ordinarily defeated if you are using a studio level con-
troller (like Orban’s 8200ST). However, in this case it is better to defeat the AGC
globally in System Setup.
AGC Controls
Full Modify Name Advanced Name Range
AGC AGC Off / On Off / On
AGC DRIVE AGC Drive –10 ... 25 dB
AGC REL AGC Master Release 0.5, 1.0, 1.5, 2 … 20 dB / S
AGC GATE AGC Gate Threshold Off, –44 ... –15 dB
AGC B CPL AGC Bass Coupling Off, –12.0 … 0 dB
--- AGC Maximum Delta Gain
Reduction
0 … 24 dB, Off
--- AGC Window Size –25 … 0 dB
--- AGC Window Release 0.5 … 20 dB
--- AGC Matrix L/R, sum/difference
--- AGC Ratio
1, 4:1, 3:1, 2:1
--- AGC Bass Threshold –12.0 … 2.5 dB
--- AGC Idle Gain –10 … +10 dB
--- AGC Bass Attack 1 … 10
--- AGC Master Attack 0.2 … 6
--- AGC Bass Release 1 … 10 dB/sec
--- AGC Master Delta Threshold –6 … +6 dB
--- AGC Bass Delta Threshold –6 … +6 dB
Table 3-5: AGC Controls