Calibration

    TV offers commands to calibrate various parameters, as there are position, width, efficiency, lefttail and righttail. You can set startchannel to define the energy associated with channel 0 and define the unit of the x-scale by setting unit.

For example to calibrate the position and width of peaks in a spectrum in buffer 0 in keV where the energy for channel 0 is 17 keV, you set the startchannel to 17, the unit to keV and perform the calibrations as shown below.

tv$>$ calibration startchannel enter 17

tv$>$ calibration unit enter keV

tv$>$ calibration position enter 1204 1197 1579 1563

tv$>$ calibration width enter 1213 4.26 1258 4.63

TV prints the parameters for the position calibration with the command:

tv$>$ calibration position list 0

and for the width calibration with the command:

tv$>$ calibration width list 0

You can list the results for the complete set of calibrations at once with the command:

tv$>$ calibration set list 0

You can save the energy calibration to a file with standard filename according to the wildcard definition *cal or another file you have to enter with the command

tv$>$ calibration position write

and load from file *cal or any other file by pressing hotkey E or by entering the full command:

tv$>$ calibration position read

You can copy the calibration to spectra in other buffers with

tv$>$ cali position copy src ind$>$ {{ind$>$... } $|$ acti $|$ all $|$ show $|$ visi}

All calibrations entered or read are copied to all buffers automatically. For the syntax of all calibration commands see section 6.2 on page .