Hello sabe,
Glad to hear that you are using National Insturment's hardware. When customers are unfaimiliar with our hardware we like to start them off with an example. There is an example which I think will suit your application. It is called "RFSG Arbitrary Waveform Generation.vi." You can find this example here: C:\Program Files\National Instruments\LabVIEW 2011\examples\instr\niRFSG. This example demonstrates how to generate an arbitrary waveform and allows you to set your IQ Rate (S/s).
Also, the "NI RF Signal Generators Help" is a great document which will help you get familiar with your new hardware. You can find the help here: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\National Instruments\NI-RFSG\Documentation.
Q: If my IQ rate is suppose 15 MS/s . Does that mean that the RFSG will be sending complex symbols in an IQ array given to it, at a rate 15 x 10^6... and if I set the IQ rate to be 100 MS/s then can it send the 100 Mega symbols in a second where as the analog bandwidth supported is just 20 MHz.?
A: No, when you perform IQ Modulation you are not sending complex symbols, you are still sending a stream of bits which are then grouped depending on the amount of symbols so they can be mapped to the corresponding symbols. (Note that MS/s stands for mega-samples per a second.)
Please let me know if you have any other questions.
Thank you,
Vimal F
Applications Engineer
National Instruments
