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4. INSTALLTION AND OPERATION
LN4000 is a pre-amplifier for receiver/scanner.
Never connect the LN4000 to a transmitter, or transceiver in transmit state.
Connect antenna (signal source) and receiver as shown below. Use supplied SMA-BNC adapter or
pre-assembled coaxial cable with SMA connectors.
From antenna (IN） ） ） ）
To receiver (OUT)
DC Cable with DC Jack.
Use supplied DC cable to feed the DC power to the LN4000. Connect wires (black / black-red) to
the regulated DC power supply. Black lead should be connected to the negative (-) side of the power
supply, and black-red lead should be connected to the positive (+) side of the power supply.
Although the LN4000 operates at 12VDC, use medium voltage (8VDC to 9VDC) if power supply is
adjustable type. Excessive voltage above 12VDC may damage LN4000.
Receiver
Commercially available SMA(P)-BNC(P) adapter is convenient when installing the LN4000 to a
receiver with BNC Jack.
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