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Clipping indicator
The clipping LED is a real time indicator of when the amplifier is clipping. It
flashes red when clipping is taking place (see figure 3-7).
AUX/MIX
MIN/MAX
Figure 3-7 — Front Panel audio clipping indicator LED and recessed
encoders
N To reduce the risk of damage to the speaker, reduce the amplifier level by turning
the encoder counterclockwise until the Clip LED turns off.
Bass, treble, and loudness control
For optimum audio quality, the audio input levels and the bass, treble, and
loudness controls must all be set up properly. Input audio levels may need to be
adjusted depending on the variation of the output levels from different source
devices.
N By default these levels are set for the consumer product level of -10 dBV.
Bass and treble should be adjusted once the input and output levels have been
adjusted. These are adjusted by RS-232 control only, with a range from -10 dB to
+10 dB. By default the bass and treble have been set at 0 dB. See chapter 4, "Serial
Communication", for details on RS-232 control.
The loudness on/off (default off) switch and the clip limiter on/off (default off)
function are also controlled by RS-232.
Aux/Mix control
The Aux/Mix input is line level mono. It is divided into two matching channels
and then summed with the main left and right channel audio inputs. Aux/Mix
volume is independent of other input gains, power amp gain, and volume. The
recessed encoder has 20 detents (steps) per revolution, each step making 1 dB
change. The Aux/mix range is from -18 dB to +24 dB, default is 0 dB.
N When the minimum (-18 dB) or the maximum (+24 dB) is reached, the min/max
LED (see figure 3-6) flashes red.
Resetting the Switcher
The switcher can be reset to the factory defaults via the front panel or RS-232.
To reset the switcher via the front panel, follow these steps.
1.
Unplug the switcher from the power source.
2.
Press and hold input selection button 1 while reapplying power to the
switcher. All the input selection LEDs blink for 1 second while the switcher
is reset.
For details on RS-232 control, see chapter 4, "Serial Communication".
AUDIO
LEVEL
CLIP
This LED flashes when the
amplifier output is clipping.
PVS 204SA Switcher • Operation and Setup
3-7
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