• Open File : A root file can be loaded using "Load File" button. This button would activate a "Dialog" to select file name.
• File Type : The type of the root file (Outputs from Pisa Client/Lt Client/ARCS Client]) should be specified in the "Radio Button" after loading the file.
• Rec# and Dir : The directory structure in the root file should be specified here. In case of Lt Client/ARCS Client the directory structure contains a record (with a given number) and then under that, directories like PeakInvOn, PeakInvOff, DecInvOn and DecInvOff depending on the APV mode of data taking are saved. One has to specify it here to select corresponding histograms. There are two "Text Fields" and once has to specify the number of the record and Directory Name.
• #APVs : In case of TT6Client output root file one can specify the number of APVs to be plotted and the starting APV number in the corresponding "Text Fields". In case of Lt/ARC client outputs the histogram is plotted for the whole module.
• Root Browser : Using "Browser" button one can open a "TBrowser" from ROOT. Any histogram from the TBrowser can be plotted into the "Embedded Canvas".
• Clear Canvas : The "Embedded Canvas" can be cleared using "Clear Canvas" button.
• Save Canvas : Once one/more histograms are plotted in the "Embedded Canvas", the picture can be saved in postscript format using "Save Canvas" button.
• Print Canvas : The plots in the "Embedded Canvas" can be directly printed in a printer using "Print Canvas" button. This would activate a dialog where the printing command should be specified. But before using this button one MUST make sure the printer is properly configured and is usable from the PC.

Comparison between Two/More Histograms :
To compare histograms one needs to load a RootFile first using "Load File" and select the Record Number and Directory properly for those File Types where it is necessary. Then can use "Draw" button to draw the first histogram. After that, one or more histograms can be superimposed on it using " Superimpose " button. This facility allows to compare histograms from different directories of the same Root File or from different files. For example one can compare the noise values from at different temperatures (different records of Lt output) etc. The histograms to be plotted/compared can be selected in the "pull down menu", "Histogram Type". The list of the quantities are

1. Pedestal

2. Raw Noise

3. CM Noise

4. Maximum Calibration Charge

5. RiseTime

Comparison with Tracker Database :
One can compare a given histogram with the corresponding values stored in the Tracker Database or with XML file to-be-stored in the Database. There is a button "Compare with DB " for this purpose. This button enables one "Pop Up Window " where one can specify following options and use "Set and Exist " button to view the distribution in comparison with the Root File.

• The Root File MUST be loaded before hand and the FileType should be selected
• For the comparison with XML file once should make sure the corresponding file (for LT/ARC) exists in the top directory of the application

• Database Type (Test, Production, Local xml file)
• Module ID
• APV Modes as stored in Root file and in Database (PeakInvOn, PeakInvOff, DecInvOn, DecInvOff)
• Parent Table of the Database/XML file (Modvalidation, LT_First, LT_Cold, LT_last)
• Variable to plot (ped, rawnoise, noise, calPA, calPT)