Index: trunk/FACT++/src/PixelMap.h
===================================================================
--- trunk/FACT++/src/PixelMap.h	(revision 12698)
+++ trunk/FACT++/src/PixelMap.h	(revision 12699)
@@ -262,5 +262,6 @@
     {
         const BiasMapEntry &entry = hv(board, channel);
-        return entry.Vnom+entry.Voff;
+        //return entry.Vnom/*-entry.Voff*/; // for testing purposes only
+        return entry.Vnom - entry.Voff; // use this with GAPDmap_20111126.txt
     }
 
@@ -277,5 +278,7 @@
         {
             const int ch = it->hv_board*32 + it->hv_channel;
-            volt[ch] += it->Vnom+it->Voff;
+            
+	    //volt[ch] += it->Vnom/*-it->Voff*/; // for testing purposes only
+	    volt[ch] += it->Vnom - it->Voff; // use this with GAPDmap_20111126.txt
         }