Connecting to computer
External power supply
Any 10-14V DC supply or battery pack with a current greater than 1A can be connected via an external
power connector. Polarity protection circuit available inside the radio.
Antenna
Any resonant antenna can be directly connected to the antenna interface (ANTENNA) with a BNC
connector, and an antenna tuner should be connected between the antenna interface and the antenna for a
non-resonant antenna.
3.5mm stereo socket (DATA IN/OUT on DR4020)
