Yup. Analog. Unencrypted. Good old fashioned FM voice.
Some congressman or other got caught doing something embarrassing when someone recorded his call on such a system.
That's why those two windows in the 800 MHz band are blocked on scanners sold in the US. All comms on those lines are long since encrypted, but the law remains on the books because some idiot in congress thought the best way to secure the signal is to outlaw receivers.
Yup. Analog. Unencrypted. Good old fashioned FM voice.
Some congressman or other got caught doing something embarrassing when someone recorded his call on such a system.
That's why those two windows in the 800 MHz band are blocked on scanners sold in the US. All comms on those lines are long since encrypted, but the law remains on the books because some idiot in congress thought the best way to secure the signal is to outlaw receivers.