the idea was more like this:
the quality and amount of the reward should not be reversely depending on the time, but on your skill to operate the scanner which means, the more accurate you create this envelope waveform to get a clearer signal the higher would be the quality and amount of your reward. this could also mean the opposite of your suggestion, hence: the more time you spend tinkering with the scanner, the better is your reward. aborting the scanner minigame just earns you the minimum reward.
how to understand the envelope filter: actually there are multiple waves with different signal strengths modulated with each other. now you create an envelope wave which isolates one frequency with a little tolerance above and beyond. the trick is to create this envelope in such a manner that you filter out signals, which are too weak to produce trackable traces and to keep inside which are worth investigating.
lets say - to make it clear
in this graphs the frequency (Hz) is on the left-to-right axis and the signal strength (dB) is on the low-to-high axis
https://sites.google.com/site/tobico...ics/signal.jpg
you have a frequency of 440Hz (you can hear this) with a signal strength of 50dB (e.g. normal speaking voice loudness)
and there is another signal with 500Hz with a signal strength of 10dB (e.g. breathing noise loudness)
and the random background noise has a signal strength of 0dB (hearing limit)
https://sites.google.com/site/tobico...cs/isolate.jpg
the skill is to isolate the two signals from the backgound noise. each isolated signal will be de-modulated from the scanner leaving the remaining signals and the noise visible as AM waveform.
if you didn't carefully match the first signal, and isolate the waveform, then the remaining signal will become too weak or too noisy to isolate another waveform.
https://sites.google.com/site/tobico...ics/result.jpg
if you just isolate one signal, then you will lose the second trace and cannot get it's reward. this means you have to carefully create these envelopes to isolate each frequency and lock them in to track them down.
if you succeed in the end you have 2 isolated signals (frequency Hz and strength dB) and a scanner that shows just the random noise within the noise threshold (red lines) around the zero line and no more waveform. this means you have collected all possible traces.