[u/mrichter/AliRoot.git] / PHOS / AliPHOSPulseGenerator.cxx

/**************************************************************************
 * Copyright(c) 2007, ALICE Experiment at CERN, All rights reserved.      *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

// The class which simulates the pulse shape from the PHOS FEE shaper,
// make sampled amplitudes, digitize them.
// Use case:
//   AliPHOSPulseGenerator *pulse = new AliPHOSPulseGenerator(energy,time);
//   Int_t *adcHG = new Int_t[pulse->GetRawFormatTimeBins()];
//   Int_t *adcLG= new Int_t[pulse->GetRawFormatTimeBins()];
//   pulse->AddNoise(1.);
//   pulse->MakeSamples();
//   pulse->GetSamples(adcHG, adcHG) ; 
//   pulse->Print();
//   pulse->Draw();
//
// Author: Yuri Kharlov, after Yves Schutz and Per Thomas Hille

// --- ROOT system ---
#include "TMath.h" 
#include "TF1.h" 
#include "TGraph.h" 
#include "TCanvas.h" 
#include "TRandom.h"

// --- AliRoot header files ---
#include "AliLog.h"
#include "AliPHOSPulseGenerator.h"

// --- Standard library ---
#include <cmath>
#include <iostream>

using std::cout;
using std::endl; 

ClassImp(AliPHOSPulseGenerator) 

Double_t AliPHOSPulseGenerator::fgCapa        = 1.;        // 1pF 
Int_t    AliPHOSPulseGenerator::fgOrder       = 2 ;        // order of the Gamma function
Double_t AliPHOSPulseGenerator::fgTimeMax     = 2.56E-5 ;  // each sample is over 100 ns fTimeMax/fTimeBins
Double_t AliPHOSPulseGenerator::fgTimePeak    = 4.1E-6 ;   // 4 micro seconds
Double_t AliPHOSPulseGenerator::fgTimeTrigger = 100E-9 ;   // 100ns, just for a reference
Double_t AliPHOSPulseGenerator::fgHighCharge  = 8.2;       // adjusted for a high gain range of 5.12 GeV (10 bits)
Double_t AliPHOSPulseGenerator::fgHighGain    = 6.64;
Double_t AliPHOSPulseGenerator::fgHighLowGainFactor = 16.; // adjusted for a low gain range of 82 GeV (10 bits) 

//-----------------------------------------------------------------------------
AliPHOSPulseGenerator::AliPHOSPulseGenerator(Double_t a, Double_t t0)
  : TObject(), fAmplitude(a), fTZero(t0), fDataHG(0), fDataLG(0), fDigitize(kTRUE)
{
  // Contruct a pulsegenrator object and initializes all necessary parameters
  // @param a digit amplitude in GeV
  // @param t0 time delay in nanoseconds of signal relative the first sample. 
  // This value should be between 0 and Ts, where Ts is the sample interval

  fDataHG = new Double_t[fkTimeBins];
  fDataLG = new Double_t[fkTimeBins];
  Reset();
}

//-----------------------------------------------------------------------------
AliPHOSPulseGenerator::AliPHOSPulseGenerator(const AliPHOSPulseGenerator & pulse)
  : TObject(), fAmplitude(pulse.fAmplitude), fTZero(pulse.fTZero), fDataHG(0), fDataLG(0), fDigitize(kTRUE)
{
  fDataHG = new Double_t[pulse.fkTimeBins];
  fDataLG = new Double_t[pulse.fkTimeBins];
  for (Int_t i=0; i<pulse.fkTimeBins; i++) {
    fDataHG[i] = pulse.fDataHG[i];
    fDataLG[i] = pulse.fDataHG[i];
  }
}

//-----------------------------------------------------------------------------
AliPHOSPulseGenerator::~AliPHOSPulseGenerator()
{
  // Destructor: delete arrays of samples

  delete [] fDataHG;
  fDataHG=0;
  delete [] fDataLG;
  fDataLG=0;
}

//-----------------------------------------------------------------------------
void AliPHOSPulseGenerator::Reset()
{
  // Reset all sample amplitudes to 0

  for (Int_t i=0; i<fkTimeBins; i++) {
    fDataHG[i] = 0.;
    fDataLG[i] = 0.;
  }
}

//-----------------------------------------------------------------------------
void AliPHOSPulseGenerator::AddBaseline(Double_t baselineLevel)
{
  // Adds a baseline offset to the signal
  // @param baselineLevel The basline level to add
  for (Int_t i=0; i<fkTimeBins; i++) {
    fDataHG[i] += baselineLevel;
    fDataLG[i] += baselineLevel;
  }
  // Digitize floating point amplitudes to integers
  if (fDigitize) Digitize();
}

//-----------------------------------------------------------------------------
void AliPHOSPulseGenerator::AddNoise(Double_t sigma)
{
  // Adds Gaussian uncorrelated to the sample array
  // @param sigma the noise amplitude in entities of ADC levels  
  
  for (Int_t i=0; i<fkTimeBins; i++) {
    fDataHG[i] = gRandom->Gaus(0., sigma) ; 
    fDataLG[i] = gRandom->Gaus(0., sigma) ; 
  }
}

//-----------------------------------------------------------------------------
void AliPHOSPulseGenerator::AddNoise(Double_t * /* sigma */, Double_t /* cutoff */)
{
  //Adds correlated Gaussian noise with cutof frequency "cutoff"
  // @param sigma noise amplitude in entities of ADC levels
  // @param -30DB cutoff frequency of the noise in entities of sampling frequency

  AliError("not implemented yet");
}

//-----------------------------------------------------------------------------
void AliPHOSPulseGenerator::AddPretriggerSamples(Int_t nPresamples)
{
  // Adds pretrigger samples to the sample arrays and replace them
  // with concatinated and truncated arrays

  Double_t *tmpDataHG = new Double_t[fkTimeBins];
  Double_t *tmpDataLG = new Double_t[fkTimeBins];
  Int_t i;
  for (i=0; i<fkTimeBins; i++) {
    tmpDataHG[i] = fDataHG[i];
    tmpDataLG[i] = fDataLG[i];
  }
  for (i=0; i<fkTimeBins; i++) {
    if (i<nPresamples) {
      fDataHG[i] = 0.;
      fDataLG[i] = 0.;
    }
    else {
      fDataHG[i] = tmpDataHG[i-nPresamples];
      fDataLG[i] = tmpDataLG[i-nPresamples];
    }
  }
  delete [] tmpDataHG;
  delete [] tmpDataLG;
}

//-----------------------------------------------------------------------------
void AliPHOSPulseGenerator::Digitize()
{
  // Emulates ADC: rounds down to nearest integer value all amplitudes
  for (Int_t i=0; i<fkTimeBins; i++) {
    fDataHG[i] = (Double_t) ((Int_t)(fDataHG[i] + 0.5));
    fDataLG[i] = (Double_t) ((Int_t)(fDataLG[i] + 0.5));
  }
}

//-----------------------------------------------------------------------------
Double_t AliPHOSPulseGenerator::RawResponseFunction(Double_t *x, Double_t *par) 
{
  // Shape of the electronics raw reponse:
  // It is a semi-gaussian, 2nd order Gamma function of the general form
  // v(t) = n**n * Q * A**n / C *(t/tp)**n * exp(-n * t/tp) with 
  // tp : peaking time par[0]
  // n  : order of the function
  // C  : integrating capacitor in the preamplifier
  // A  : open loop gain of the preamplifier
  // Q  : the total APD charge to be measured Q = C * energy
  
  Double_t signal ;
  Double_t xx = x[0] - ( fgTimeTrigger + par[3] ) ; 

  if (xx < 0 || xx > fgTimeMax) 
    signal = 0. ;  
  else {
    Double_t fac = par[0] * TMath::Power(fgOrder, fgOrder) * TMath::Power(par[1], fgOrder)/fgCapa ; 
    signal = fac * par[2] * TMath::Power(xx/fgTimePeak, fgOrder) * TMath::Exp(-fgOrder*(xx/fgTimePeak)) ;
  }
  return signal ;  
}

//__________________________________________________________________
Double_t AliPHOSPulseGenerator::RawResponseFunctionMax(Double_t charge, Double_t gain) 
{
  // Maximum value of the shaper response function
  return ( charge * TMath::Power(fgOrder, fgOrder) * TMath::Power(gain, fgOrder) 
	   / ( fgCapa * TMath::Exp(fgOrder) ) );  
}

//__________________________________________________________________
Bool_t AliPHOSPulseGenerator::MakeSamples()
{
  // for a start time fTZero and an amplitude fAmplitude given by digit, 
  // calculates the raw sampled response AliPHOSPulseGenerator::RawResponseFunction

  const Int_t kRawSignalOverflow = 0x3FF ; // decimal 1023
  Bool_t lowGain = kFALSE ; 

  TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);

  for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
    signalF.SetParameter(0, fgHighCharge) ; 
    signalF.SetParameter(1, fgHighGain) ; 
    signalF.SetParameter(2, fAmplitude) ; 
    signalF.SetParameter(3, fTZero) ; 
    Double_t time = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
    Double_t signal = signalF.Eval(time) ;     
    fDataHG[iTime] += signal;
    if ( static_cast<Int_t>(fDataHG[iTime]+0.5) > kRawSignalOverflow ){  // larger than 10 bits 
      fDataHG[iTime] = kRawSignalOverflow ;
      lowGain = kTRUE ; 
    }

    signalF.SetParameter(0, GetRawFormatLowCharge() ) ;     
    signalF.SetParameter(1, GetRawFormatLowGain() ) ; 
    signal = signalF.Eval(time) ;  
    fDataLG[iTime] += signal;
    if ( static_cast<Int_t>(fDataLG[iTime]+0.5) > kRawSignalOverflow)  // larger than 10 bits 
      fDataLG[iTime] = kRawSignalOverflow ;

  }
  // Digitize floating point amplitudes to integers
  if (fDigitize) Digitize();
  return lowGain ; 
}

//__________________________________________________________________
void AliPHOSPulseGenerator::GetSamples(Int_t *adcHG, Int_t *adcLG) const
{
  // Return integer sample arrays adcHG and adcLG
  for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
    adcHG[iTime] = static_cast<Int_t>(fDataHG[iTime]) ;
    adcLG[iTime] = static_cast<Int_t>(fDataLG[iTime]) ;
  }
}

//__________________________________________________________________
void AliPHOSPulseGenerator::Print(Option_t*) const
{
  // Prints sampled amplitudes to stdout
  Int_t i;
  cout << "High gain: ";
  for (i=0; i<fkTimeBins; i++)
    cout << (Int_t)fDataHG[i] << " ";
  cout << endl;

  cout << "Low  gain: ";
  for (i=0; i<fkTimeBins; i++)
    cout << (Int_t)fDataLG[i] << " ";
  cout << endl;
}

//__________________________________________________________________
void AliPHOSPulseGenerator::Draw(Option_t*)
{
  // Draw graphs with high and low gain samples

  Double_t *time = new Double_t[fkTimeBins];
  for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
    time[iTime] = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
  }
  Int_t nPoints = fkTimeBins;
  TGraph *graphHG = new TGraph(nPoints,time,fDataHG);
  TGraph *graphLG = new TGraph(nPoints,time,fDataLG);
  graphHG->SetMarkerStyle(20);
  graphLG->SetMarkerStyle(20);
  graphHG->SetMarkerSize(0.4);
  graphLG->SetMarkerSize(0.4);
  graphHG->SetTitle("High gain samples");
  graphLG->SetTitle("Low gain samples");

  TCanvas *c1 = new TCanvas("c1","Raw ALTRO samples",10,10,700,500);
  c1->SetFillColor(0);
  c1->Divide(2,1);
  c1->cd(1);
  gPad->SetLeftMargin(0.15);
  graphHG->Draw("AP");
  graphHG->GetHistogram()->SetTitleOffset(1.6,"Y");
  graphHG->GetHistogram()->SetXTitle("time, #musec");
  graphHG->GetHistogram()->SetYTitle("Amplitude, ADC counts");
  c1->cd(2);
  gPad->SetLeftMargin(0.15);
  graphLG->Draw("AP");
  graphLG->GetHistogram()->SetTitleOffset(1.6,"Y");
  graphLG->GetHistogram()->SetXTitle("time, #musec");
  graphLG->GetHistogram()->SetYTitle("Amplitude, ADC counts");
  c1->Update();
}
Commit	Line	Data
431a9211	1	/**************************************************************************
	2	* Copyright(c) 2007, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17
	18	// The class which simulates the pulse shape from the PHOS FEE shaper,
	19	// make sampled amplitudes, digitize them.
	20	// Use case:
	21	// AliPHOSPulseGenerator *pulse = new AliPHOSPulseGenerator(energy,time);
	22	// Int_t *adcHG = new Int_t[pulse->GetRawFormatTimeBins()];
	23	// Int_t *adcLG= new Int_t[pulse->GetRawFormatTimeBins()];
2111ab30	24	// pulse->AddNoise(1.);
431a9211	25	// pulse->MakeSamples();
	26	// pulse->GetSamples(adcHG, adcHG) ;
	27	// pulse->Print();
	28	// pulse->Draw();
	29	//
	30	// Author: Yuri Kharlov, after Yves Schutz and Per Thomas Hille
	31
	32	// --- ROOT system ---
	33	#include "TMath.h"
	34	#include "TF1.h"
	35	#include "TGraph.h"
	36	#include "TCanvas.h"
2111ab30	37	#include "TRandom.h"
431a9211	38
	39	// --- AliRoot header files ---
	40	#include "AliLog.h"
	41	#include "AliPHOSPulseGenerator.h"
	42
	43	// --- Standard library ---
	44	#include <cmath>
	45	#include <iostream>
	46
	47	using std::cout;
	48	using std::endl;
	49
	50	ClassImp(AliPHOSPulseGenerator)
	51
	52	Double_t AliPHOSPulseGenerator::fgCapa = 1.; // 1pF
	53	Int_t AliPHOSPulseGenerator::fgOrder = 2 ; // order of the Gamma function
	54	Double_t AliPHOSPulseGenerator::fgTimeMax = 2.56E-5 ; // each sample is over 100 ns fTimeMax/fTimeBins
	55	Double_t AliPHOSPulseGenerator::fgTimePeak = 4.1E-6 ; // 4 micro seconds
	56	Double_t AliPHOSPulseGenerator::fgTimeTrigger = 100E-9 ; // 100ns, just for a reference
	57	Double_t AliPHOSPulseGenerator::fgHighCharge = 8.2; // adjusted for a high gain range of 5.12 GeV (10 bits)
	58	Double_t AliPHOSPulseGenerator::fgHighGain = 6.64;
	59	Double_t AliPHOSPulseGenerator::fgHighLowGainFactor = 16.; // adjusted for a low gain range of 82 GeV (10 bits)
	60
	61	//-----------------------------------------------------------------------------
	62	AliPHOSPulseGenerator::AliPHOSPulseGenerator(Double_t a, Double_t t0)
	63	: TObject(), fAmplitude(a), fTZero(t0), fDataHG(0), fDataLG(0), fDigitize(kTRUE)
	64	{
	65	// Contruct a pulsegenrator object and initializes all necessary parameters
	66	// @param a digit amplitude in GeV
	67	// @param t0 time delay in nanoseconds of signal relative the first sample.
	68	// This value should be between 0 and Ts, where Ts is the sample interval
	69
	70	fDataHG = new Double_t[fkTimeBins];
	71	fDataLG = new Double_t[fkTimeBins];
2111ab30	72	Reset();
431a9211	73	}
	74
	75	//-----------------------------------------------------------------------------
	76	AliPHOSPulseGenerator::AliPHOSPulseGenerator(const AliPHOSPulseGenerator & pulse)
	77	: TObject(), fAmplitude(pulse.fAmplitude), fTZero(pulse.fTZero), fDataHG(0), fDataLG(0), fDigitize(kTRUE)
	78	{
	79	fDataHG = new Double_t[pulse.fkTimeBins];
	80	fDataLG = new Double_t[pulse.fkTimeBins];
	81	for (Int_t i=0; i<pulse.fkTimeBins; i++) {
	82	fDataHG[i] = pulse.fDataHG[i];
	83	fDataLG[i] = pulse.fDataHG[i];
	84	}
	85	}
	86
	87	//-----------------------------------------------------------------------------
	88	AliPHOSPulseGenerator::~AliPHOSPulseGenerator()
	89	{
	90	// Destructor: delete arrays of samples
	91
	92	delete [] fDataHG;
	93	fDataHG=0;
	94	delete [] fDataLG;
	95	fDataLG=0;
	96	}
	97
2111ab30	98	//-----------------------------------------------------------------------------
	99	void AliPHOSPulseGenerator::Reset()
	100	{
	101	// Reset all sample amplitudes to 0
	102
	103	for (Int_t i=0; i<fkTimeBins; i++) {
	104	fDataHG[i] = 0.;
	105	fDataLG[i] = 0.;
	106	}
	107	}
	108
431a9211	109	//-----------------------------------------------------------------------------
	110	void AliPHOSPulseGenerator::AddBaseline(Double_t baselineLevel)
	111	{
	112	// Adds a baseline offset to the signal
	113	// @param baselineLevel The basline level to add
	114	for (Int_t i=0; i<fkTimeBins; i++) {
	115	fDataHG[i] += baselineLevel;
	116	fDataLG[i] += baselineLevel;
	117	}
2111ab30	118	// Digitize floating point amplitudes to integers
2111ab30	119	if (fDigitize) Digitize();
431a9211	120	}
	121
	122	//-----------------------------------------------------------------------------
2111ab30	123	void AliPHOSPulseGenerator::AddNoise(Double_t sigma)
431a9211	124	{
2111ab30	125	// Adds Gaussian uncorrelated to the sample array
431a9211	126	// @param sigma the noise amplitude in entities of ADC levels
431a9211	127
2111ab30	128	for (Int_t i=0; i<fkTimeBins; i++) {
	129	fDataHG[i] = gRandom->Gaus(0., sigma) ;
	130	fDataLG[i] = gRandom->Gaus(0., sigma) ;
	131	}
431a9211	132	}
431a9211	133
431a9211	134	//-----------------------------------------------------------------------------
	135	void AliPHOSPulseGenerator::AddNoise(Double_t * /* sigma /, Double_t / cutoff */)
	136	{
	137	//Adds correlated Gaussian noise with cutof frequency "cutoff"
	138	// @param sigma noise amplitude in entities of ADC levels
	139	// @param -30DB cutoff frequency of the noise in entities of sampling frequency
	140
	141	AliError("not implemented yet");
	142	}
	143
	144	//-----------------------------------------------------------------------------
	145	void AliPHOSPulseGenerator::AddPretriggerSamples(Int_t nPresamples)
	146	{
	147	// Adds pretrigger samples to the sample arrays and replace them
	148	// with concatinated and truncated arrays
	149
	150	Double_t *tmpDataHG = new Double_t[fkTimeBins];
	151	Double_t *tmpDataLG = new Double_t[fkTimeBins];
	152	Int_t i;
	153	for (i=0; i<fkTimeBins; i++) {
	154	tmpDataHG[i] = fDataHG[i];
	155	tmpDataLG[i] = fDataLG[i];
	156	}
	157	for (i=0; i<fkTimeBins; i++) {
	158	if (i<nPresamples) {
2111ab30	159	fDataHG[i] = 0.;
2111ab30	160	fDataLG[i] = 0.;
431a9211	161	}
431a9211	162	else {
2111ab30	163	fDataHG[i] = tmpDataHG[i-nPresamples];
2111ab30	164	fDataLG[i] = tmpDataLG[i-nPresamples];
431a9211	165	}
	166	}
	167	delete [] tmpDataHG;
	168	delete [] tmpDataLG;
	169	}
	170
	171	//-----------------------------------------------------------------------------
	172	void AliPHOSPulseGenerator::Digitize()
	173	{
	174	// Emulates ADC: rounds down to nearest integer value all amplitudes
	175	for (Int_t i=0; i<fkTimeBins; i++) {
	176	fDataHG[i] = (Double_t) ((Int_t)(fDataHG[i] + 0.5));
	177	fDataLG[i] = (Double_t) ((Int_t)(fDataLG[i] + 0.5));
	178	}
	179	}
	180
	181	//-----------------------------------------------------------------------------
	182	Double_t AliPHOSPulseGenerator::RawResponseFunction(Double_t x, Double_t par)
	183	{
	184	// Shape of the electronics raw reponse:
	185	// It is a semi-gaussian, 2nd order Gamma function of the general form
	186	// v(t) = n*n Q * A*n / C (t/tp)*n exp(-n * t/tp) with
	187	// tp : peaking time par[0]
	188	// n : order of the function
	189	// C : integrating capacitor in the preamplifier
	190	// A : open loop gain of the preamplifier
	191	// Q : the total APD charge to be measured Q = C * energy
	192
	193	Double_t signal ;
	194	Double_t xx = x[0] - ( fgTimeTrigger + par[3] ) ;
	195
	196	if (xx < 0 \|\| xx > fgTimeMax)
	197	signal = 0. ;
	198	else {
	199	Double_t fac = par[0] * TMath::Power(fgOrder, fgOrder) * TMath::Power(par[1], fgOrder)/fgCapa ;
	200	signal = fac * par[2] * TMath::Power(xx/fgTimePeak, fgOrder) * TMath::Exp(-fgOrder*(xx/fgTimePeak)) ;
	201	}
	202	return signal ;
	203	}
	204
	205	//__________________________________________________________________
	206	Double_t AliPHOSPulseGenerator::RawResponseFunctionMax(Double_t charge, Double_t gain)
	207	{
	208	// Maximum value of the shaper response function
	209	return ( charge * TMath::Power(fgOrder, fgOrder) * TMath::Power(gain, fgOrder)
	210	/ ( fgCapa * TMath::Exp(fgOrder) ) );
	211	}
	212
	213	//__________________________________________________________________
	214	Bool_t AliPHOSPulseGenerator::MakeSamples()
	215	{
	216	// for a start time fTZero and an amplitude fAmplitude given by digit,
	217	// calculates the raw sampled response AliPHOSPulseGenerator::RawResponseFunction
	218
2111ab30	219	const Int_t kRawSignalOverflow = 0x3FF ; // decimal 1023
431a9211	220	Bool_t lowGain = kFALSE ;
	221
	222	TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
	223
	224	for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
	225	signalF.SetParameter(0, fgHighCharge) ;
	226	signalF.SetParameter(1, fgHighGain) ;
	227	signalF.SetParameter(2, fAmplitude) ;
	228	signalF.SetParameter(3, fTZero) ;
	229	Double_t time = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
	230	Double_t signal = signalF.Eval(time) ;
2111ab30	231	fDataHG[iTime] += signal;
	232	if ( static_cast<Int_t>(fDataHG[iTime]+0.5) > kRawSignalOverflow ){ // larger than 10 bits
	233	fDataHG[iTime] = kRawSignalOverflow ;
431a9211	234	lowGain = kTRUE ;
431a9211	235	}
431a9211	236
	237	signalF.SetParameter(0, GetRawFormatLowCharge() ) ;
	238	signalF.SetParameter(1, GetRawFormatLowGain() ) ;
	239	signal = signalF.Eval(time) ;
2111ab30	240	fDataLG[iTime] += signal;
	241	if ( static_cast<Int_t>(fDataLG[iTime]+0.5) > kRawSignalOverflow) // larger than 10 bits
	242	fDataLG[iTime] = kRawSignalOverflow ;
431a9211	243
431a9211	244	}
2111ab30	245	// Digitize floating point amplitudes to integers
2111ab30	246	if (fDigitize) Digitize();
431a9211	247	return lowGain ;
	248	}
	249
	250	//__________________________________________________________________
	251	void AliPHOSPulseGenerator::GetSamples(Int_t adcHG, Int_t adcLG) const
	252	{
	253	// Return integer sample arrays adcHG and adcLG
	254	for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
	255	adcHG[iTime] = static_cast<Int_t>(fDataHG[iTime]) ;
	256	adcLG[iTime] = static_cast<Int_t>(fDataLG[iTime]) ;
	257	}
	258	}
	259
	260	//__________________________________________________________________
	261	void AliPHOSPulseGenerator::Print(Option_t*) const
	262	{
	263	// Prints sampled amplitudes to stdout
	264	Int_t i;
	265	cout << "High gain: ";
	266	for (i=0; i<fkTimeBins; i++)
	267	cout << (Int_t)fDataHG[i] << " ";
	268	cout << endl;
	269
	270	cout << "Low gain: ";
	271	for (i=0; i<fkTimeBins; i++)
	272	cout << (Int_t)fDataLG[i] << " ";
	273	cout << endl;
	274	}
	275
	276	//__________________________________________________________________
	277	void AliPHOSPulseGenerator::Draw(Option_t*)
	278	{
	279	// Draw graphs with high and low gain samples
	280
	281	Double_t *time = new Double_t[fkTimeBins];
	282	for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
	283	time[iTime] = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
	284	}
	285	Int_t nPoints = fkTimeBins;
	286	TGraph *graphHG = new TGraph(nPoints,time,fDataHG);
	287	TGraph *graphLG = new TGraph(nPoints,time,fDataLG);
	288	graphHG->SetMarkerStyle(20);
2111ab30	289	graphLG->SetMarkerStyle(20);
	290	graphHG->SetMarkerSize(0.4);
	291	graphLG->SetMarkerSize(0.4);
431a9211	292	graphHG->SetTitle("High gain samples");
	293	graphLG->SetTitle("Low gain samples");
	294
	295	TCanvas *c1 = new TCanvas("c1","Raw ALTRO samples",10,10,700,500);
2111ab30	296	c1->SetFillColor(0);
431a9211	297	c1->Divide(2,1);
	298	c1->cd(1);
	299	gPad->SetLeftMargin(0.15);
	300	graphHG->Draw("AP");
	301	graphHG->GetHistogram()->SetTitleOffset(1.6,"Y");
	302	graphHG->GetHistogram()->SetXTitle("time, #musec");
	303	graphHG->GetHistogram()->SetYTitle("Amplitude, ADC counts");
	304	c1->cd(2);
	305	gPad->SetLeftMargin(0.15);
	306	graphLG->Draw("AP");
	307	graphLG->GetHistogram()->SetTitleOffset(1.6,"Y");
	308	graphLG->GetHistogram()->SetXTitle("time, #musec");
	309	graphLG->GetHistogram()->SetYTitle("Amplitude, ADC counts");
	310	c1->Update();
	311	}