Found on 469.975 FMFrequency Modulation on my ICOM HT can't get waterfall cause I don't have my RTL-SDR here. When I'll have a better recording I'll send it. It sounds like the portable traffic lights but it not the same...
"unknown 469 is a signal from wireless alarm monitoring services. Homes and businesses with alarm systems can have a wireless transmitter for backup or for locations without a phone line." Someone verify this please. --Cartoonman (talk) 10:54, 2 November 2015 (NZDT)