QuantAsylum QA401, Руководство пользователя

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QuantAsylum QA401 User ’s Manual
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The ramp up period of the waveform allows the various output audio stages external to the QA401 to
stabilize their DC operating points. This gentle ramp also ensures audible pops are avoided that might
harm power output stages.
The constant amplitude region is the region over which the FFT will actually be computed.
The ramp down region ensures again that a sine wave isn’t terminated mid cycle which might also result
in a click or pop, and it ensures the DC level is gently returned to zero.
Normally, you’ll be looking at the display with the following buttons pressed: Freq, Input and Left and/or
right. This will show you the captured FFT data on the incoming signal.
When the right button is pressed, as shown above, the display will show the right channel data in the
color red. Below, we see the left channel data shown in yellow, and the right channel data shown in red.
And of course, if we only wanted to show right channel data we would simply turn the left display off by
pressing the left button.