Does our RTL-SDR dongle survive direct 1 pulse-per-second feeding to its antenna input? That was a question we raised and thought about for about 1 attosecond before we decide "hell yeah, let's try that and see what happens!". And it worked out pretty neat! That's cool if sdr hardware is cheap as dirt and you can replace it very easily. But before I bore you with impulsive reaction facts, what you see on the waterfall diagrams is a rock radio station near Stuttgart and our test pulse that came in every 2342ms for 100ms. We expected the additional voltage to level up the input power, but it did the opposite. It saturated the first capacitor and then added to the adc reducing the sensitivity. But it also served our goal to have a trigger mark in the input signal. And best thing, in fm we could still listen to the Blues Brothers without any disturbance! ;)