EFJohnson LTR-Net 002-9803-601 - Manual (Page 13)

CONTROLS AND DISPLAY
13
Rear Panel Jacks and Connectors
Antenna Jack - Miniature UHF jack for connecting the 50-ohm
antenna.
Power Jack - Connection point for the power cable which attaches to
the vehicle battery. A nominal 12-volt DC, negative ground power
source is required.
Speaker Jack - Connection point for an optional external 4.7-ohm,
5-watt speaker. The internal speaker is automatically disabled when a
speaker is plugged into this jack.
Accessory Cable (Not Shown) - This optional cable is used to
connect functions such as ignition switch sense to the transceiver.
Antenna
Jack
Speaker
Jack
Power
Jack