################## class fm_preemph(gr.hier_block): """ FM Preemphasis IIR filter. """ def __init__(self, fg, fs, tau1=50e-6, f2): """ @param fg: flow graph @type fg: gr.flow_graph @param fs: sampling frequency in Hz @type fs: float @param tau1: Time constant in seconds (75us in US, 50us in EUR) @type tau1: float @param f2: cutoff frequency in Hz,choose f2 > f1 ( f1 is 2.12KHz in US, 3.2KHz in EUR) @type f2:
float """