Omnia 6FM, Инструкция по установке и эксплуатации

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Omnia 6 Use and Installation Guide – Version 1.00a
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Input
This submenu has seven items:
•
Input Gain Left/Right, Master Drive
•
Input Source Selection
•
Invert Both Channels Option
•
Input Mode Selection
•
HP Filter Selection
•
Phase Rotation Selection
•
Pre-Emphasis Selection
Input Submenu
Input Gain Left / Right
These controls set both the analog and digital input peak levels. For an analog signal, the control range is
from -18 to +12. For digital signals, the range is from -30 dBFS (deciBels below digital Full Scale) to 0
dBFS. The factory default control setting of 0.0dB corresponds to a nominal input level of +4 dBu (-12
dBFS).
To change the input sensitivity, highlight the control and click, then use the jog-wheel to adjust the level in
0.2 dB steps. –18.0 dB has the least amount of gain; +12.0 dB is the maximum gain. Compare the setting of
this control with the input bargraph meters so that signal
peaks (the “bouncing balls”) read at -12 dBFS but
no higher.
Master Drive
This control, located after the input bargraph meters, calibrates the nominal internal level of the Omnia-
6fm to match the reference level of your air chain. This control may need to be adjusted if your station's
audio reference level is something other than +4dBu. It also may need adjusting if the input audio feeding
the Omnia6-fm is pre-processed to reduce the peak-to-average ratio, or if you wish to bypass the
WB AGC
and have too little gain. The range of this control is –9dB to +6dB.
Note: Normally there should be 10-12 dB of nominal gain reduction in the WB AGC section. This will
occur when a +4dBu average input level is present, the Left / Right gain controls are adjusted for peak
input levels just reaching –12dBFS, and when the Input Gain , Master Drive , and AGC Drive controls are
set at 0.0. If not, you may adjust the Master Drive control to achieve the desired WB AGC gain reduction
value.