Hi,
It appears that you are asking about how to do serial programming in LabVIEW. Have you taken any of the LabVIEW training courses? This is one of the basic topics that is covered and is greatly helpful. I have attached a few links below as reference:
http://zone.ni.com/devzone/conceptd.nsf/webmain/C553228FD78A7ADD862568F9006E9129?opendocument
http://zone.ni.com/devzone/conceptd.nsf/webmain/8DECBF3E0B714BF3862568F9006E7851?opendocument
You can also go to http://www.ni.com/devzone/dev_exchange/ex_search.htm and search for serial examples if you want more examples in addition to the ones that ship with LabVIEW (Help -> Find Examples).
Serial communication is very simple. You have to open a connection to the port that you have your tranceiver connected to,
using something like VISA Open function. Then you can read or write to that port. And thats it. Take a look at the examples for a better understanding. I would highly recommend getting some training or purchasing on of the books on LabVIEW. This stuff is simple, but not trivial.
Hope this helps.
A.S.
Anu Saha
Academic Product Marketing Engineer
National Instruments