Freezing, in my opinion, the Paul 1.4 firmware is still the best version. Signal mode works very well but your latest firmware has glitches in that it doesn’t “pause” the display once triggered. The display keeps refreshing whenever multiple rising edges are encountered.
You would need to fix this along with the stray pixels appearing after awhile. This gets annoying and one must turn off the unit then back on to clear the display.
Please fix and post an update soon since your latest firmware does have potential 
. Until then, I will keep using the Paul 1.4 firmware.
Thx.