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LC ChemStations Revision A.03.xx or higher
Date 01/10/94
Macro Contribution #2
Contribution 'Load Maximum Chromatogram from DAD spectral matrix'

Revision History
----------------

  1. A.02.xx original version
  2. A.03.xx includes installation update.
  3. A.06.xx made compatible with the A.05.01 and later revisions
             data analysis view and signal selection combo box
    

Contribution Purpose
--------------------
	
To extract and display the maximum chromatogram from a set of
DAD spectra.


Contribution Structure
----------------------

	One macro file, 'MaxSign.mac'.
	

Prerequisites
-------------

       - MS operating system as supported by the revision of the ChemStation in use          
       - The LC ChemStation software, Rev A.03.xx or higher



Installation
------------

	* Copy the macro to the ChemStation's executable directory,
	  'C:\CHEM32\CORE' by default.

Use
---

	* Load the macro into the ChemStation using the command ...

		Macro MaxSign.mac
	
	The command self installs into the File menu under the 
	Load sub-menu. 

	After a data file (signal) has been loaded into the 
	ChemStation the menu item can be used to extract the 
	maximum chromatogram and display it.



Operation Overview
------------------

The macro checks for data consistency between the loaded 
chromatogram and a spectral matrix if one exists. If no matrix
or the incorrect one is loaded, the DAD spectra are loaded into
memory from disc. 

The macro creates a memory register, that is zero filled, the
same size as the chromatographic signal. The matrix rows are scanned	 
for the largest point and these are stored into the appropriate
part of the maximum chromatogram memory register.

The macro corrects for the differences in data acquisition rates
between the chromatographic signal and the spectral matrix that 
can occur by restricted spectral acquisition modes by extrapolating
the last value put into the maximum chromatogram over the missing
time interval.