void GetList(Int_t trk,Int_t ht,Int_t mod,AliITSpList *pLt,
AliITSTableSSD *tav);
// sets thresholds and fills digits
void GetList(Int_t trk,Int_t ht,Int_t mod,AliITSpList *pLt,
AliITSTableSSD *tav);
// sets thresholds and fills digits
// Writes Summable Digits to a root file for later use.
void WriteSDigits(AliITSpList *pList);
// ReadSDigits and create Digits
// Writes Summable Digits to a root file for later use.
void WriteSDigits(AliITSpList *pList);
// ReadSDigits and create Digits