Hi Jared,
You are correct. These measurements are features of Spike and are not available through a public API.
The SA44 API consists only of low level data acquisition functions. You would need to use the API to retrieve IQ data from the receiver and then make your measurements on this data. Average power would be easy to calculate but carrier offset of a digitally modulated signal is non-trivial.
At this moment, there is not a way to retrieve these measurements programatically. We have talked about making Spike programmable via SCPI but there is no definite plans of this yet.
I apologize for the inconvenience.
If you have additional questions, please let me know.
Regards,
Andrew
