BOOST/CUT
&
ROLL-OFF
The Boost/Cut controls has two distinct functions depen- ding on the mode you are in. Boost and Cut as well as roll- off
characteristics.
Fig. 1:
Dotted line: Max. boost and cut +/-12dB; Q = 1,5
Solid line: Phase response at Q = 1,5
Fig. 2:
Dotted line: Max. boost and cut +/-12dB; Q = 0,2
Solid line: Phase response at Q = 0,2
The Boost/Cut control (+/-) is has two functions depen- ding on the mode you are working in. If the rotary switch is set to Parametric, the control acts as a conventional Boost/Cut control providing a range of plus or minus 12dB.
In Notch, Band-pass, High-Pass or Low-Pass modes, the control determines the roll-off characteristics of the filter res- ponse.
In the fully anti-clockwise position, the response is gentle while the fully clockwise position produces a steep filter res- ponse. As the control is moved towards the center position, the input signal is nulled with itself, with complete cancella- tion occurring at the center or zero position.
In Notch, Band-pass, High-Pass or Low-Pass modes, this control would normally be set at or close to its extremes, though other settings can produce useful results if you com- pensate for any gain loss using the Output control.
On the front panel all legends for Notch, Band-pass, High-Pass or Low-Pass modes are printed in italics to indica- te that the roll-off function (also in italics) applies to them.
