_RL hs_period
& hs_period, hs_StartTime,
I hs_StartTime, hs_period, hs_RepCycle,
I 'exf', 'hs_', hs_period,
I hs_period, exf_inscal_hs, hs_const,
& hs_RepCycle, hs_period, hs_StartTime,
hs_period = 0.0 _d 0
I hs_file, hs_RepCycle, hs_period,