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7) R otary encoder: in normal operation, you can control the master volume with this encoder.
When you enter the menu, this encoder is used to change the selected parameter value. The
editable parameter will be highlighted in the display.
8) S tandby LED: this LED lights up when the amplifier is in standby mode. The standby function is
available via RS232 instruction only. When the mains power switch is in the OFF position, all
electrical circuits will be deactivated and standby mode will not be available.
LED VU Meter
In normal situations, the LED VU meter indicates the channel's output level, where 0 dB is the absolute
maximum. The LED's will light up in green, showing the actual output level.
When the push button beneath the VU meter is pushed once, the channel is muted. The SGL/ERROR
LED will light up orange. When the SGL/ERROR is red, an error has occurred and the channel will be
disabled or muted until the error is removed.
When the master level is turned up, the output level will increase. When the maximum safe level is
reached, the internal compressor will reduce the output signal. The upper LED's in the VU meter will
become orange to indicate the measure of automatic gain reduction. When the 0 dB LED lights up red,
the amplifier is clipping. Always avoid clipping!
LCD Display
INFO@APART-AUDIO.COM
When in use, the display will show the user definable text. Default text is
CHAMP 3D, large font. This text and the font type can be changed via
RS232 instructions.
The actual master level is also shown, in this case -72 dB.
Pushing the push button next to the arrow will allow you to enter the main
menu. The next screen will pop up
7
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