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6.9 High Power Outputs Tab
Kit Operation
This tab contains four groupings of controls, one for each of the high power outputs. Each output has a
mixer to mix the LINE2L, LINE2R, DAC_L and DAC_R signals, assuming that the DACs are not routed
directly to the high power outputs (see Section 6.5.1 ).
Figure 14. High Power Output
The controls are divided such that the right channel controls are on the left side of the tab and the left
channel controls are on the right side of the tab. Each output group contains a power button, 3-state
control button, four mixer volume controls and a output amplifier volume control.
At the right side of the output strip is a master volume knob for that output, which allows muting the output
or applying gain up to 9dB.
The mixer control volume controls allow for each of four input sources to be independently controlled to
allow volume adjustment and summing. Each of these controls allow adjustment of the volume from
–78.3dB to 0dB, including mute.
The power button controls whether the corresponding output is powered up or not. When powered down,
the outputs can be 3-stated or driven weakly to a the output common mode voltage; this option is selected
using the button below the power button.
The COM outputs ( HPLCOM and HPRCOM) can be used as independent output channels or can be used
as complementary signals to the HPL and HPR outputs. In these complementary configurations, the COM
outputs can be selected as differential signals to the corresponding outputs or may be set to be a common
mode voltage. When used in these configurations, the power button for the COM output is disabled, as the
power mode for that output will track the power status of the HPL or HPR output that the COM output is
tracking.
SLAU201 – November 2006 TLV320DAC32EVM and TLV320DAC32EVM-PDK 21
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