User Manual

6
7. DC Power Injector Connections and Indicators
Red Transmit LED:
This LED glows RED when the pole mounted amplifier goes into transmit
amplification mode. The Remote Transmit LED is controlled by unique
circuitry, which actually detects changes in the DC current traveling through
the transmission line to the amplifier. When you see this LED flash, you will
know that the remote pole amplifier is going into transmit mode.
Green Receive LED: This LED glows GREEN when DC power is applied to the amplifier and it is
in the receive mode. When toggling between transmit and receive this LED
will glow slightly dimmer.
“To Radio”
Connection:
This N-type female connects to the radio via a short jumper cable.
“To Amplifier”
Connection:
This N-type female connects to the amplifier on the mast using the coax
transmission line.
12 VDC: This is the DC power input for the injector and is a standard 2.1 mm barrel
jack. +12VDC should be applied with center positive.
AUX 12VDC:
(OPTIONAL)
This jack parallels the 12 VDC jack power jack. It can be used to provide 12
VDC to the radio modem or Access Point using a short DC jumper cable.
Provided that the radio device operates on 12 VDC and draws less then 600
ma, the standard DC power supply that comes with the amplifier kit can be
used to power both it and the amplifier/DC Injector. This extra jack is
installed when the DC-INJ-DUAL option is ordered.
8. Power Supply
The AMP2440 kit comes with a 100 to 240 VAC power supply that has a standard 2.1 mm barrel
plug [center pin positive (+) tip and outer ring negative (-)]. Although normally supplied with a power
supply, any 12 Volt DC, 1 amp (or greater) regulated power supply can be used. The amplifier can
operate from 11 to 14 VDC enabling battery or vehicle operation as well.
The DC power input is diode protected to prevent damage caused by reverse polarity input voltages
as well as by an TVS to protect it and the amp from overvoltage surges.