I've been doing some extensive test for the last couple months with my 3.825 and 3.826 version regarding the J alert. At one point i was worried that once a J alert occurs, it may not respond to a true radar source which i did encounter with a speed sign. As you all know we get VERY RARE true radar source that is "J" ed out with our V1 with POP feature and usually occurs when LEO already past by. This phenomenon is very hard to duplicate with several runs with different Ka band radar and even with your encounters with LEO.
So what i did to find out was to set my V1 with POP on to increase "J" alert from other Rd's. Every "J" alerts i get, i followed it by turning on different radar gun(different Ka band frequencies) onboard to see if the V1 will react to it by alerting to a new true radar source or will just be muted.
With all those test conducted, results concluded that everytime i turn on the radar in different Ka band frequencies after or during a "J" alert, the V1 will **** ALWAYS **** alert to a new threat.
If your 3.825 and up version is working just fine with no other issues, you DON'T need to worry about it or get a different version. The "J" alert works great but not 100% because we do get short burst of false Ka alert but the V1 does not junk it. Save you some money and think hard before you get another version.