Can anyone please explain the below parameter and their use. I've searched in google but I think I should have looked in manuals which are not available to me but I've asked for them:
Those fields are all explained in the CA-7 manuals. If your site has a license for CA-7, you have access to the manuals. They may be hard copy at your site, or via a site intranet, or directly from CA (you'll need to know your site ID to get them downloaded from CA).
Unless CA has changed them, the CA-7 manuals include a glossary (which would explain those terms) as well as a Primer which is a good starting point for someone without knowledge of CA-7.