modulation session refnum

[PhilG]

In the Modulation Toolkit 4.0, I came across something new (to me at least).  What is a Modulation Session Refnum? It appears to be required by the Reed Solomon Encoding/Decoding VIs and yes, I did find how to obtain one using open and close modulation session VIs.   I did see in theRS encode/decode example that it is opened, passed to both subVIs and then closed.  Normally I will not be using both encode and decode in the same VI.  This seems to be somewhat of a lone wolf - with no other information that I could find.  Can anyone provided information as to what this is for?

[RobertSzalapski]

Hi Phil,

The Modulation Session Refnum can be wired to a property node and then you get access to certain properties about the modualtion.  For example, Reed-Solomon parity position.  See the "MT PSK BER vs EbNO graph [Reed-Soloman coding].vi" example to see more about how it works.  Or wire it to an empty property node and see what you can do for yourself.  I hope this helps!

Robert Szalapski

Applications Engineer

National Instruments