I passed one of those radar speed signs that show how fast you are going in Auburn Hills, MI. My V1 (1 month old) did not make a peep. I slowed down and speed up to make sure that it was reading my speed. Later in the day I passed another speed sign it and triggered off my V1 no problem. What kind of radar could that sign have been using? I have never seen that before. Are they using a new band?