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Preset Button
Pressing the Preset button once automatically selects the tuner, even if a different source
was already selected. It temporarily converts the knob from controlling volume to become
the Preset Selector for the stations that were stored into the 20 possible memory presets. Its
blue LED will stay lit for five seconds during which time the rotary knob is available for
selecting presets. If you want the knob to revert to volume control without waiting five
seconds, press the Preset button again.
Digital Button
Pressing the Digital button once temporarily converts the knob from controlling volume to
become the Digital Input Selector. Its blue LED will stay lit for five seconds during which
time you can choose any of the eight digital inputs, the 5.1 channel analog input, or return to
analog. If you want the knob to revert to volume control without waiting five seconds, press
the Digital button again.
Surround Button
Pressing the Surround button once temporarily converts the knob from controlling volume
to become the Surround Mode Selector. Its blue LED will stay lit for five seconds during
which time you can choose any of the five ASP modes. If you want the knob to revert to
volume control without waiting five seconds, press the Surround button again.
Surround Mode Indicators
These indicators let you know the type of digital bitstream the AVC-2500 has detected and
how it is being decoded.
DTS indicator
The blue DTS indicator illuminates when the AVC-2500 has detected a DTS bitstream,
regardless of which ASP mode you have selected.
Dolby Digital
The blue Dolby Digital indicator illuminates when the AVC-2500 has automatically detected
a Dolby Digital bitstream, regardless of which ASP mode you have selected.
Pro Logic Indicator
The blue Pro Logic indicator illuminates when the AVC-2500 has automatically detected an
analog, PCM, or 2/0 Dolby Digital signal. However, Pro Logic processing is only available
in the Cinema ASP mode.
Overload Indicator
The red Overload indicator will illuminate when any of the internal analog-to-digital
converters are being overloaded. This only occurs when an unusually high output analog
source is selected. The AVC-2500 monitors the extent and duration of the signal overload to
determine the optimum signal level applied to the A/D converters. If this indicator flashes,
the AVC-2500 will attenuate the signal just until the internal analog-to-digital converters
are no longer overdriven and the overload indicator stops flashing. This new level will remain
while the source is playing so there are not audible volume fluctuations. You can also manually
adjust the input level to the analog to digital converters in the setup menu.