#Parameters
is_panel = get_exec_pars().source != CommandSource.ui    # run from panel
if is_panel:
    tds     = args[0]
    phase   = args[1]
else:
    tds     = "S30CB14"
    phase   = 0.0
    
# set beam phase offset
phase_rf        = caget(tds + "-RSYS:GET-VSUM-PHASE")
phase_corr      = caget(tds + "-RSYS:GET-VSUM-PHASE-OFFSET-CORR")
phase_offset    = phase - phase_rf - phase_corr
caput(tds + "-RSYS:SET-VSUM-PHASE-OFFSET-BASE", phase_offset)
caput(tds + "-RSYS:SET-BEAM-PHASE", phase)