diff --git a/convertDRS4/README.txt b/convertDRS4/README.txt
index d10cfb685bb0ca7841c3abb6e54951e211d0a972..1467860ef1dda7293c007f1fc61c94b6367f29fa 100644
--- a/convertDRS4/README.txt
+++ b/convertDRS4/README.txt
@@ -1,8 +1,8 @@
 Application for convertation of binary files acquired by DRS4 to ROOT file.
 
-1. g++ -o read_binary read_binary.cpp -lm `root-config --cflags --libs`
-This compiles read_binary.cpp file and makes object file read_binary.
-2. ./read_binary_DRS4 ./data/rawDataDSR4/file_name.dat
-With the help of the object file it is possible to convert binary file .dat to file .root (which we call raw /home/dariak/NeuRad_tests/data/rawDataDSR4)
-3. read_root.C 
-This script reads raw file and make another file .root with simple analysis /home/dariak/NeuRad_tests/data/dataDSR4
+1. read_binary.cpp complies within makefile (commaned make clean, then make in Neurad_test) and makes object file read_binary in current directory
+2. To convert binary file to root file do:
+./read_binary_DRS4 ./data/rawDataDSR4/input_file_name.dat ../data/rawDataDSR4/output_file_name.root
+!both input and output files should be specified!
+
+
diff --git a/convertDRS4/read_binary.cpp b/convertDRS4/read_binary.cpp
index 466aa5b1e481b37a21d8fe2b851005e776829ca6..1b66e0907e593fa67b53ad5abeaabad2ee5ccd48 100644
--- a/convertDRS4/read_binary.cpp
+++ b/convertDRS4/read_binary.cpp
@@ -85,15 +85,28 @@ int main(int argc, const char * argv[])
    float bin_width[16][4][1024];
    int i, j, b, chn, n, chn_index, n_boards;
    double t1, t2, t3, t4, dt, dt34;
-   char filename[256];
+   char filename[256];	//for input binary file
+   char outroot[256];	//for output root file
 
    int ndt;
    double threshold, sumdt, sumdt2;
 
+   if (argc == 3) {
+      strcpy(filename, argv[1]);
+      strcpy(outroot, argv[2]);
+   }
+   else if (argc == 2) {
+      printf("Error: both input binary file and output root file should be specified!\n");
+      return -1;
+   }
+   else {
+      printf("Error: input binary file and output root file should be specified!\n");
+      return -1;
+   }
 
-//for ROOT
+// ---------------for ROOT
 
-   TFile* rfile = new TFile("../data/rawDataDSR4/NeuRad_test_07_1.root", "RECREATE");
+   TFile* rfile = new TFile(outroot, "RECREATE");
    TTree* rtree = new TTree("rtree", "tree for drs4 analysis");
    //rtree->Branch("t1", &t1, "t1/D"); //br for time of threshold crossing signal in 1 ch
   // rtree->Branch("t2", &t2, "t2/D"); //br for time of threshold crossing signal in 2 ch
@@ -111,13 +124,8 @@ int main(int argc, const char * argv[])
 //   rtree->Branch("amp_ch2", amp_ch2, "amp_ch2[ncell]/D"); 
 //  rtree->Branch("time_ch2", time_ch2, "time_ch2[ncell]/D"); 
 
-   if (argc > 1)
-      strcpy(filename, argv[1]);
-   else {
-      printf("Usage: read_binary <filename>\n");
-      return 0;
-   }
-   
+//----------------
+
    // open the binary waveform file
    FILE *f = fopen(filename, "r");
    if (f == NULL) {
diff --git a/data/rawDataDSR4/NeuRad_test_07_1.root b/data/rawDataDSR4/NeuRad_test_07_1.root
index 4db35226a0dab300ab36bd3d7a62f73ec3c7f304..90a88499c4f2ab689bb01700927b9ef67a1c87b7 100644
Binary files a/data/rawDataDSR4/NeuRad_test_07_1.root and b/data/rawDataDSR4/NeuRad_test_07_1.root differ