Audio Technica 3000 Series User Manual page 7

Part names and functions
Rear panel
❶
Antenna input jack
Attach the antenna directly, or extend it with a low-loss antenna cable.
❷
Unbalanced output jack (6 3 mm (1/4"))
❸
Balanced output jack (XLR 3-pin male)
GND
❹
Ground lift switch
This switch isolates the GND pin of the balanced output from the ground.
Normally use in the GROUND position, but if a hum develops due to a ground loop, switch to the "GROUND LIFT" side.
❺
Power input jack
Connect the DC plug from the included AC adapter for 12 V, 1 A.
❶
HOT
COLD
❷ ❸
6
❹ ❺