This procedure initialized the sm_par structure for STXM 5. Call
IDL> sm_ipar_stxm5, sm_par, $
sm_par_n_adc_channels=sm_par_n_adc_channels, $
sm_par_n_scaler_channels=sm_par_n_scaler_channels, $
sm_par_maxpointlist=sm_par_maxpointlist, $
sm_par_strlen=sm_par_strlen
The four keywords hold numbers which determine the number of
elements for some of the structure tags. For STXM 5 they are
fixed, but they can be specified for compatibility with STXM 4.