Recalibration

 

Due to electrical effects during the data aquisition, peaks may be shifted in some spectra which means that peaks that should be at the same position are not. Shifting spectra to have their according peaks in the same channels is provided by TV with the recalibration commands. Basically this is a linear calibration.

For example load two spectra prge[35].0121 which are shifted. In order to perform the recalibration you have to define at least one recalibration region. The region is defined by pressing the hotkey Rr once for the left border and once again for the right side. To perform the recalibration enter

tv$>$ recalibration create

in the text window. TV will query you for further parameters, as there are the reference spectrum and a list of spectra to be recalibrated. By default the type of recalibration is set to squared-distance. You can change this for example to center-of-mass with the command:

tv$>$ recalibration type center-of-mass

Redisplay the window to see the results by pressing hotkey CR or with the command:

tv$>$ window redisplay

You can print a list of recalibration parameters with the command:

tv$>$ recalibration list

A list of all recalibration commands is printed in section 6.7 on page .