I have aligent CGH data i have download the raw file as well as series matrix file in which they have log value but they do not have probe name.. how to read and normalized the data that is not clear with me...i have seen in limma package in that they have this command

targets <- readTargets("targets.txt")
RG <- read.maimages(targets, source="genepix", wt.fun=f)

but i am confused what is in targets.txt file which type of data it have..

Please help me

Section 4.3 of the limma User Guide, The Targets Frame, explains the format of a targets file and shows screenshots of some examples.