Stereo Audio Input/Output Boards
130
Optima Instruction Manual
Adjusting Output Volume
Volume (Digital Gain)
Output volume can be adjusted using either a control panel with volume adjustment (see the control
panel’s instruction manual) or BCS (Basic Control Structure) commands from an external controller.
BCS Volume Adjustment
Volume can be adjusted using one of three BCS command methods: Absolute, Relative, or Increment/
Decrement. Directions for adjusting volume using the Absolute Method (adjusting volume
to
a specific
decibel level) are given below. Information and instructions for the other two methods can be found in
the
BCS Protocol Instruction Manual
on the
AMX AutoPatch CD
or at
www.amx.com
.
To adjust volume using the BCS Absolute Method:
1.
Enter the Volume Absolute command using the format below. Replace the “
#
”s with the level
number and the output number, and replace “
^^^
” with the decibel level. Enter the decibel level as
a decimal number to the tenth place without the decimal point (e.g., –31.5 dB is entered as -315).
CL#O#VA^^^T
Example
Adjust the volume to +10 dB for Output 3 on Level 0 (VM 0) by entering the following BCS command
line:
CL0O3VA100T
Note
:
The total through-system gain (the amount of input gain plus the amount of output gain)
specified for any input to output routing path cannot exceed 10 dBr. If a volume command is entered
that exceeds 10 dBr when it is combined with the gain of an input, the command will be accepted
(and will be indicated in status results) but will not result in an audible difference of more than
10 dBr.
Adjusting Digital Input Gain
If a board supports digital input gain, adjustments can be made at any time during normal operation
using either a control panel with input gain adjustment (see the control panel’s instruction manual) or
BCS commands.
Inputs are set to unity gain at the factory and have a gain adjustment range of -10 dB to +10 dB.
Caution
:
We strongly recommend that input gain adjustment be made only by a qualified installer or
dealer.
Adjusting input gain (the nominal level of the signal from the source device) allows source signals of
varying amplitudes to be equalized before they are routed and the volume is adjusted. Equalizing source
levels provides a consistent reference for volume adjustments and eliminates jumps when routing a new
input to an output. Input gain adjustment is also used for equalizing amplitudes between balanced and
unbalanced inputs.
To equalize input levels by adjusting input gain:
1.
Route the first input (source) to an output (destination).
2.
Adjust the input gain for the source to a specific dB level (see page 131).
3.
Repeat for all inputs that will be routed to the same output.
Note
:
The total through-system gain (the amount of input gain plus the amount of output gain)
specified for any input to output routing path cannot exceed 10 dBr. If an input gain command is
entered that exceeds 10 dBr when it is combined with the gain (volume) of an output, the command
will be accepted (and will be indicated in status results) but will not result in an audible difference of
more than 10 dBr.
Summary of Contents for AutoPatch Optima AVS-OP-1616-110
Page 1: ...Instruction Manual Matrix Switchers Optima Distribution Matrix Release 05 27 2008...
Page 7: ...Contents iv Optima Instruction Manual...
Page 13: ...Notices 6 Optima Instruction Manual...
Page 47: ...Installation Setup 40 Optima Instruction Manual...
Page 79: ...Appendix D Adding or Replacing I O Boards 72 Optima Instruction Manual...
Page 99: ...Standard Video Hi Z Sync Input Output Boards 92 Optima Instruction Manual...
Page 107: ...Wideband Video 300 MHz Input Output Boards 100 Optima Instruction Manual...
Page 113: ...RGBHV HD 15 Input Output Boards 106 Optima Instruction Manual...
Page 117: ...SD SDI HD SDI Input Output Boards 110 Optima Instruction Manual...
Page 131: ...DVI Input Output Boards 124 Optima Instruction Manual...
Page 139: ...Stereo Audio Input Output Boards 132 Optima Instruction Manual...
Page 151: ...RGBHV Stereo to CatPro Input Output Boards 144 Optima Instruction Manual...
Page 163: ...XNNet Expansion Board 156 Optima Instruction Manual...