add(new QuadratureDemod(5, 0));
add(new QuadratureDemod(5, 1));
    public void init(final float center_freq) {	add(new ComplexFIRFilter(33000000, 825, 400, center_freq, 2));	add(new QuadratureDemod(5, 0));	add(new RealFIRFilter(8000, 5, 4000, 20, 1));    }