RX-65 K & Ka audio alert .... weird
Happy New Year everyone.
Yesterday I picked-up a Ka band alert in a city where only K band is used so I figured "it's 2006 so they must have made a purchase". A mile + down the road was a city police car and, as I approached the signal changed from Ka to K band as signal strength increased. I approached until I had a full audio & 9/9 bars K band alert.
I turned the corner & changed from Ka Intl to Ka USA to see if the RX-65 behaved any differently. I drove through the trap again and, from the get-go, I picked-up K band only and ... here's the weird part .... when it went to full 9/9 bars and max K band audio alert I heard a noise underneath the K band audio alert that sounded like a geiger counter.
It didn't sound distorted and was not "clicking" as fast as the full K-band alert was beeping but definitely there.
I turned around, set the RX-65 back to Ka Intl and drove through the trap a 3rd time. This time no Ka alert, only K, and at full strength I had a full K band audio alert with no "geiger counter" clicking underneath the alert.
Any one else experienced this? Any thougths?
RX-65 was purchased from Roy & is rel. 4.5
Ka detects on K band signals
It's quite possible that the RX65 is detecting the K band signal as a Ka initially due to something known as image detection. RX65s rely on harmonic mixing, 2nd harmonic mix for K and Ka. Even though the unit should know where in its sweep range it is, it is still a reality of the limitation of design that it may well be seeing an image mix of weak K band signals, after a couple of seconds the signal is large enough to overcome this image mixing issue and the correct band then sounds.
It would be wise to pay attention to any Ka alert in any event....! :idea: