I have a test and measurement application where I need to produce certain kinds of signals. I have no experience with SDR but I'm wondering if SDR or DDS chips could produce what I need. For example, I could use something like LimeSDR, or a DDS chip like AD9910.
As I understand it the SDR input is a series of I/Q values that could change at up to the symbol rate. For now, ignore Q, say it's always zero. When the I input is 0, 0, 0, max value, 0, 0... - what does the radio output in the time domain?
I assume the signal doesn't go from zero to max amplitude instantly; the amplitude ramps up and down at a certain rate. Is there a spec for this? Could someone who has a SDR radio record this on a fast scope and post here?