This is a signal from a Californian Electricity 'Smart Meter'. Each house is now fitted with one of these, and they are strong - typically 50 dBThe decibel (dB) is a logarithmic unit used to express the ratio of two values of a physical quantity, here the strength of a received signal. above the atmospheric noise level.
The ISM band from 902-928 MHzMegaHertz (MHz) 10^6 Hz is fully used by these meters
Log Periodic 850-6500 MHzMegaHertz (MHz) 10^6 Hz.