convert ps to pdf

Dear List,

last Time i wanted to convert several ps-pages to indpendent jpeg-files in
landscape orientation. The options -c "<< /Orientation 3 >> setpagedevice"
-f (orientation) and out%03d.jpeg (for indipendent files) helped me for this
task (thank you for the hints, Russel).
This time i would like to create a pdf-file from every ps-page. Which
Options  do i have to write this time.

Thank you,
Jo 

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