HTP-1 Installation and User Guide Release 1.8.1
The signal generator indicates that it is on with purple text on the main page, and on the front panel.
Several test signals are available:
“THX like” band limited noise
The industry commonly uses a reference originally defined by THX. This is a band limited pink noise
signal. Each of these signals is calibrated to be at 30dB below full scale RMS.
The main channel spectrum looks something
like you see to the left.
The left and right hand sides of the spectrum
are 4th order band limiting filters. The slope
downward from 400 to 2000Hz is the “pink”
spectrum falling off as 1/f.
The spectrum of the subwoofer signal is
illustrated here. It is quite different from
the main speaker spectrum. It is
similarly band limited pink noise, but the
band limiting is applied with 8th order
filters at 30 and 80Hz.
HTP-1 User Manual Page 61 V1.8.1
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