Question id 147 - Radio Navigation - ATPL - Airline Transport Pilot license

The correct ICAO 24 bits aircraft address code must be inserted on the control panel.
With the selector knobs the four digits of the squawk can be selected using the decimal symbols 0 through 9.
With ALT selected a reply in the modes A, C and S can be transmitted.
Range within "line of sight", and maximum of 200 NM