Select Chromatogram Dialog

Use this dialog to select the chromatogram to use in the S/N calculation.

Select the Chromatogram List Box

Select the chromatogram here to be used in the S/N calculation.  All chromatograms currently available in the data file are listed for 	selection.  The user may also choose 'User Selected EIC' and enter the mass range to be used in the appropriate edit boxes described below.  The specified EIC will be automatically loaded.

User Selected EIC Group Box

Enter the starting and ending mass ranges used for EIC extraction when 'User Selected EIC' is chosen in the Select the Chromatogram list box.

Starting Mass - for EIC. Default: 1. Range 1 - 999999.

Ending Mass - for EIC. Default: 999. Range 1 - 999999.

Select Signal Region Window

This window is automatically created on 'OK' exit of the 'Select the Chromatogram' dialog.  Use this window to select the 'signal" region of the chromatogram used in the calculations.

Zoom - Use left-click and drag to zoom in, left-double-click

to zoom out one level.  You may zoom in as many times

as is required to select the desired signal region.

Accept - Use <ctrl>left-click to accept the displayed region

of the chromatogram as the signal region.  The region

accepted for use as the signal region will be indicated

in this window with a shaded background.

Select Noise Region Window

This window is automatically created on 'OK' exit of the 'Select the Chromatogram' dialog.  Use this window to select the 'noise' region of the chromatogram used in the calculations.

Zoom - Use left-click and drag to zoom in, left-double-click

to zoom out one level.  You may zoom in as many times

as is required to select the desired noise region.

Accept - Use <ctrl>left-click to accept the displayed region

of the chromatogram as the noise region.  The region

accepted for use as the noise region will be indicated

in this window with a shaded background.

Signal-to-Noise Report Window

This window is automatically created once a signal region and noise region have been

selected and accepted.  It contains a preview of the S/N report including: data file information, graphics of the signal and noise regions selected, and the S/N calculations.  If the signal or noise region is re-selected, the report is re-generated based on the new data.  Use this window to preview the S/N results before printing.

Ending the Macro

Use the menu item 'UCL, Chromatogram S/N, End S/N Macro' to close all S/N associated windows and the report viewer.