I'm curious to know if there is a way to "recalibrate" the TTL output voltages from Artiq. Currently the low voltage is 1.22V and the high voltage is 3.9V (as measured by a multimeter). We have a fast, broadband switch that needs more precise values though: 0-0.8 for low and 1.2-3.3 for high. Is the only solution to use a voltage divider? Or can we somehow adjust the ttl voltages in software?