Is There Any Way to Test Your Jammer Heads???

Is there any way to test the jammer heads on my Bel Rx75pp to see if they are doing their job? Seeing them perform before getting hit by a real 5-0 laser is all I'm after. Hopefully without having to buy more gadgets. (wife uses he word junk) Possible?

cyberblob has a LIDAR gun and he lives in MN. You can PM him.

laser tester

Get this http://www.radarbusters.com/products...ser-tester.asp aim it at your jammer head and then look at the jammer heads in a camera phone of night vision video camera