Originally Posted by
CJR238
X2, way too many people think I/O, POP and QT are all the same thing, and they are totally different.
Quick-Trigger is I/O on steroids. POP is I/O on crack.
Well, not exactly. I/O is simply a method of operating the radar, where it's kept on standby until the operator wants to clock someone's speed, then he turns the transmitter on, gets a reading, and then (may) turn it off again. Thus the duration of the signal is dependent on when the LEO flips the switch/trigger/button. It could be a couple seconds, or he could decide to leave the radar on for a while.
Quick-trigger is another operator tactic, not a specific feature of a radar gun. It's just I/O where the LEO switches the gun in and out of transmit quickly (e.g. less than a second), just long enough to get a speed reading, and short enough to cause some RDs to not alert. Most modern guns are fast enough to do QT.
POP is a hardware/software feature on certain radar units made by MPH Industries. When enabled (it isn't by default), the computer in the gun triggers 67ms or 16ms pulses (depending on the gun) and takes speed readings from them. Although the operator uses the gun like a regular I/O gun (press button, get speed reading), it's the computer that controls the transmitter instead of the operator.
POP is quite rare, as the MPH Bee III and Z-series guns aren't as popular as Kustom, Stalker and Decatur units (and even other MPH units w/o POP), and most who do have them either don't know about the POP feature or don't always bother to use it.
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