Thanks very much Marcus. I eventually figured out that in the variable block, I needed to include:
gr.firdes.complex_band_pass (gain,sampling_freq,low_cutoff_freq, high_cutoff_freq, transition_width, window = WIN_HAMMING,beta = 6.76) and when I plugged in some variables based on the b/w and centre frequency, the Decimating FIR filter block went good! Of course, no idea if my guesses are real-world. Look forward to getting the latest and greatest. Slainte, John
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