inversion

I am copying somebody using AAR Channel 55 160.935 with an 186.2 Hz tone from here in Downtown Sacramento. The nearest license is Richmond Pacific RR in Richmond. ULS only show Richmond and LA/San Diego licenses. Any ideas? I do not have the descrambler to hear the actual traffic. B.......

2 days ago I heard scrambled (inversion) comms on one of the 39.xxx mhz CHP channels... This was in Mendocino County I was driving and in the light available I wasn't able to see which EXACT channels it was. If I hear it again I hope I can hit the manual button in time, so it doesn't...