I have a Uniden SDS100. I have both the Butel ARC536Pro and ProScan. It seems like the ARC536Pro logs a "hit" as soon the squelch breaks. ProScan, on the other hand, seems to only log a hit if the signal is present for a bit longer. I have absolutely NO evidence to confirm this, but I am interested in hearing the experiences from others that have used both the Butel ARC536Pro and ProScan.
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