Orban OPTIMOD-FM 8600, Руководство по эксплуатации

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OPTIMOD-FM DIGITAL OPERATION
3-35
If the
G
ATE
T
HRESH
(Gate Threshold) control is turned
O
FF
, the
DJ B
ASS
boost setting is disabled.
HF Enhance
is a program-adaptive 6 dB/octave shelving equalizer with a 4 kHz
turnover frequency. It constantly monitors the ratio between high frequency and
broadband energy and adjusts the amount of equalization in an attempt to make
this ratio constant as the program material changes. It can therefore create a bright,
present sound without over-equalizing material that is already bright.
Rumble Filter 30 Hz HPF determines if a 30 Hz 18 dB/octave highpass filter will be
placed in-circuit before other processing. This control affects both the HD and FM
processing chains regardless of the setting of the
FM

HD C
ONTROL
C
OUPLING
con-
trol.
Phase Rotator determines if the phase rotator will be in-circuit. The purpose of the
phase rotator is to make voice waveforms more symmetrical. This can substantially
reduce distortion when they are peak limited by the 8600’s back end processing. This
control affects both the HD and FM processing chains regardless of the setting of the
FM

HD C
ONTROL
C
OUPLING
control.
In most cases, we recommend that the phase rotator be left active. How-
ever, because it can slightly reduce the clarity and definition of program
material, you can defeat it if you are operating the 8600 conservatively
and not attempting to achieve very high on-air loudness.
You have somewhat more leeway than you do in older Orban FM proces-
sors like the 8200 because the 8600’s new distortion control will work to
help prevent audible speech distortion even when the phase rotator is
switched out.
Multipath Mitigator / Phase Corrector See “Multipath Mitigator” Left/Right
Phase Skew Correction on page 3-8.
Stereo Enhancer Controls
The stereo enhancer is common to the FM and HD processing chains. You You can
operate it in one of two modes or “styles.” The first emulates the Orban 222 analog
stereo enhancer, while the second mode, called Delay, emulates a popular enhancer
from another manufacturer that adds a delayed version of the L–R signal to the
Stereo Enhancer Controls
Basic / Intermediate Name Advanced Name Range
Amount Amount 0.0 ... 10.0
Enhancer In / Out Out / In
Ratio Limit Ratio Lim 70 … 100%
Diffusion Diffusion Off, 0.3 ... 10.0
Style Style 222 / Delay
Depth Depth 0 … 10
Table 3-3: Stereo Enhancer Controls