Lesa,
Do you see the same results when you use the Scope Soft
Front Panel?
Can you try using the shipping examples Fgen 5404 Sine
Generation.vi? It is located in Hardware
Input and Output > Modular Instruments > NI-FGEN > Standard Function
Generation.
Also can you post the code you are referring to if you are
still encountering issues?
I hope this helps!
Ryan N
National Instruments
Application Engineer
ni.com/support