TYT TH-7800, User Manual

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05
DC Power Cable Connection
Note: Locate the power input connector as close to the transceiver as possible.
The vehicle battery must have a nominal rating of 12V. Never connect the transceiver to a 24V battery. Be sure to use a
12V vehicle battery that has sufficient current capacity. If the current to the transceiver is insufficient the display may dar-
ken during transmission or transmitting output power may drop excessively.
1. Route the DC power cable supplied with the transceiver directly to the vehicle's battery terminals using the shortest p-
ath from the transceiver. We suggest you do not use the cigarette lighter socket as some cigarette lighter sockets intr-
oduce an unacceptable voltage drop. The entire length of the cable must be dressed so it is isolated from heat, moistu-
re and the engine secondary (high voltage) ignition system/cables.
2. After installing the cable, in order to avoid the risk of damp, please use heat-resistant tape to tie together with the fuse
box. Do not forget to reinforce the whole cable.
3. Confirm the correct polarity of the connections, then attach the power cable to the battery terminals: Red connects to
the positive (+) terminal and black connects to the negative (-) terminal.
4. Reconnect any wiring removed from the negative terminal.
5. Connect the DC power cable to the transceiver's power supply connector. Press the connectors firmly together until
the locking tab clicks.
Ext. Power jack
DC power cable
06
Fixed Station Operation
In order to use this transceiver for fixed station operation you will need a separate 13.8V DC power supply (not included).
Please contact your local dealer about it.
The recommended current capacity of your power supply is 12A.
1. Connect the DC power cable to the regulated DC power supply and ensure that the polarities are correct. (Red: positi-
ve; Black: Negative).
Do not directly the transceiver to an AC outlet.
Use the supplied DC power cable to connect the transceiver to a regulated power supply.
Do not substitute a cable with smaller gauge wires.
2. Connect the transceiver's DC power connector to the connector on the DC power cable.
3. Press the connectors firmly together until the locking tab clicks.
Note:
Before connecting the DC power to the transceiver be sure to switch the transceiver and the DC power supply OFF.
Do not plug the DC power supply into an AC outlet until you make all connections.
DC power cable with fuse holder
Regulated power supply
Black
Red
Regulated
power supply
1
2