User's Manual

1
Installation and Operation Manual
AMP2440 Power Amplifier
1.0 Description
The AMP2440 is a bi-directional amplifier designed for extending the range of 2.4 GHz wireless
radio modems, Wireless LAN cards, Access Points and wireless bridges. The units provide
transmit power amplification as well as receive signal gain. The amplifier is installed right at the
antenna’s feed point, providing maximum effectiveness of transmit power. This has the effect of
compensating for signal loss in the transmitter cable to the antenna. Likewise, the Low Noise
Amplifier (LNA) in the AMP2440 boosts the receive signal right at the antenna prior to
experiencing the loss in the transmission cable to the radio. This gain completely overcomes
the losses in the transmission cable between the amplifier and the radio. This results in the
lowest possible system Noise Figure. In fact, use of the amp will actually increase the receiver
sensitivity by a few dB! The ultimate result is the best receiver sensitivity and maximum
possible range for whatever antenna is used.
The amplifier box is weatherproof and can be bolted to the antenna mast or tower leg using the
U-bolt included. When properly installed, the connectors face down so that gravity will drain all
water away from the amplifier enclosure. This will prevent water from settling on the face of the
unit. The LEDs will also be facing downward so that they can be checked for operation from the
bottom of the mast or tower.
DC Power to the amplifier is supplied through the transmission cable that carries the RF (Radio
Frequency) signal. This DC voltage is put on the coax cable using the DC Power Injector
included in the amplifier kit. Both the amplifier and the DC Injector also contain their own
integral lightning protection as well as DC surge protection. No external antenna lightning
protection on the coax cable is required. The DC Injector has a grounding stud to facilitate an
easy connection to a good earth ground. It also has mounting flanges to facilitate permanent
installation to a bulkhead or wall. If mounted to a grounded metal plate, then no extra grounding
wires are needed. The amplifier box will provide maximum lightning protection when it is bolted
to a grounded mast or tower. No extra ground straps need to be connected to the amplifier
case.
2.0 Amplifier Features
• Transmit input levels from 3mW to 100mW, (10mW for the standard amp)
• 14 dB transmitter power gain (standard amp)
• 16 dB receive gain
• RX preamp noise figure better than 4 dB (typical)
• Mast-mountable weatherproof cast aluminum case
• DC power for the amp carried up through the transmission cable
• Power and Transmit LEDs on both the amp and the DC power injector
• Built-in lightning protection
• DC surge protection
• Heavy duty N-type connectors
• One-year warranty
• Made in the U.S.A.