I'm working with the EVAL-ADN2530 board. When I give it a signal at a lower data rate my (<1 kHz) laser doesn't actuate from 0 to 100%, it's modulation is more like 90% to 100%, which doesn't give me the full range of the signal. I've noticed that as I increase the data rate my received signal becomes full on and full off during modulation. The data sheet gives an upper limit but I was wondering if there's a lower limit that I should avoid.