def METHOD_NAME(request, freqs):
    return (
        dict(Nfreqs=100, start_freq=1e6, channel_width=1e4),
        dict(Nfreqs=100, start_freq=1e6, bandwidth=1e6),
        dict(start_freq=1e6, channel_width=1e4, bandwidth=1e6),
        dict(freq_array=freqs),
    )[request.param]