Source inspection-0101insp.type

Resp.Gurus,

For practice Source inspection in IDES client,When I searched in Scn & SDN documents,all are suggesting to select 01 insp.type & 'additional' only 0101 inspection type  for source inspection.

I am getting very much confusion about 0101,0102,0130 and tick mark in Preffeerd insp.type ,

Q1:a)Is it must to select 0101 only for S.Inspection?(is GR insp.model = Sorce inspection?)

what is the use of 0101,0102,0130.

Gurus,Please guide me to start up.I will practice and attach the screen shots.

Thanks in advance,