Start here:

nrao.edu

try websites of institutions taking care of those instruments - there should be some info for observers and instruction how to allocate time. most technical info are usually there

Thank you dear Charles and Katarzyna for the information. I tried their websites but could not find, probably one need more effort or it is also possible that this information is not open... any way I'll try again.

Let me know if any of these are helpful for you:

https://www.astron.nl/~mag/dokuwiki/lib/exe/fetch.php?media=radio_astronomy_lec_3_ma_garrett.pdf

http://www.haystack.edu/edu/undergrad/materials/tut6.html

http://egg.astro.cornell.edu/alfalfa/ugradteam/pdf12/radio_lecture_jess_uat12.pdf

https://ned.ipac.caltech.edu/level5/March01/Andernach/Ander2.html

Ok, thanks, I'll have a look :)

Thanks dear Alvaro :)