[Discuss-gnuradio] Question on GRC XML

[gcd]

ref to http://www.mail-archive.com/address@hidden/msg26987.html

For updating the blks2_dxpsk2_demod.xml to match the usrp_rx_dpsk.py

__init__(self, samples_per_symbol=2, excess_bw=0.35, freq_alpha=0.01, 
phase_alpha=0.01,timing_alpha=0.1, timing_max_dev=1.5, gray_code=True, 
verbose=False, log=False,sync_out=False)

I'd like to add freq_alpha and phase_alpha column to the GRC block,
could anyone advice on the callback sections, where's the clock_recov and 
time_recov.set_alpha go for?

thanks!
-       <callback>clock_recov.set_alpha($costas_alpha)</callback>
-       <callback>clock_recov.set_beta(0.25*$costas_alpha**2)</callback>
        <callback>time_recov.set_alpha($timing_alpha)</callback>