User Manual

1
1. 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 wiring need to be attached to the grounding
stud. 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. Amplifier Features
• Transmit input levels from 3mW to 100mW
• 14 dB transmitter power gain (Standard amp)
• 16 dB receive gain
• RX preamp noise figure better then 4 dB (typical)
• Weatherproof Cast Aluminum Case that is mast mountable
• 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 Lightening Protection
• DC Surge Protection
• Heavy Duty N-type Connectors
• One Year Warranty
• Made in the U.S.A.