TEMA TELECOMUNICAZIONI SRL
Audio Amplifier AD301R
MAS-AD301R-REV01EN
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5. OPERATION
Please refer to the following block diagram of the device to describe the system.
The "Equalizer" block realized with analog technology manages the inputs, the tone controls, the
level signaling on the LED and passing the signals to the final stage of amplification, completely
digital, in D class.
The two signals on the two inputs are mixed together (with a common level control) so that a ste-
reo source can also be correctly distributed.
There are two LEDs, "Power" indicating the powered system and "Level" which provides a visual
indication of the audio signal output to the speakers.
The Level LED flashes following the audio from when the output signal is approximately at -20dB
with respect to the maximum undistorted power (meaning about 10% distortion), it is steady for
signals around the maximum output level (probable 100% distortion).
It is also allowed a tone correction on the input signals to better adapt the audio to the acoustics of
the environment to be sounded.
Finally, the "Power supply" block supplies the internal circuitry correctly.