The tinySA can be used as a signal generator and in low output mode there are some options for modulation.
Using the AM modulation to create a 10MHz signal?
with another tinySA in zero span mode it is possible to look at the modulation as one full scan of 290 points only takes 232 milliseconds
and indeed the modulation is a sawtooth with a frequency somewhere below 1kHz
As you can see the output level still needs some calibration.
