User`s guide

Accessory Installation
BreezeNET PRO.11 Series 6-7 User’s Guide
The amplifier is installed directly at the antenna’s feed point, providing maximum
effectiveness of transmit power which compensates for signal loss in the transmitter
cable to the antenna. Likewise, the Low Noise Amplifier (LNA) in the AMP 2440
boosts the receive signal right at the antenna prior to experiencing the loss in the
transmission cable to the radio. This gain also overcomes the losses in the
transmission cable between the amplifier and the radio. In fact, use of the
AMP 2440 bi-directional amplifier will actually increase the receiver sensitivity of
the radio by 4dB. The ultimate result is the best possible noise figure and maximum
receiver sensitivity. System gains of up to 30 dB are typical when amplifiers are
used at each end of a link.
The AMP 2440 bi-directional amplifier is completely weatherproof and can be
bolted to the antenna mast or tower leg using the U-bolt included. 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. Likewise, since the
LEDs are also facing downward they can be checked for operation from the bottom
of the mast.
DC Power to the amplifier is supplied through the transmission cable, using an
indoor power supply and DC Injector. The amplifier unit also contains its own
integral lightning protection and DC surge protection to ensure years of continuous
outdoor operation.
BreezeCOM provides the user with two models of the AMP 2440 bi-directional
amplifier:
• AMP 2440-500. Provides 500 mW (+27dBm) maximum output
• AMP 2440-250. Provides 250 mW (+24dBm) maximum output
The transmit gain for both models is 12 - 15dB. Full output power of
approximately 500 mW is achieved with 30 mW (+15 dBm) input to the amplifier;
8 mW (+9dBm) for the AMP 2440-250 model. The amplifier goes into limiting at
this point and higher input power results in only slight increases in the output
power. Up to 100 mW of power may be safely applied directly to the amplifier
input without any damage on either model.
The AMP 2440 bi-directional amplifier comes with power supplies that have
standard 2.1 mm barrel plugs (which are configured as positive (+) tip and negative
(-) outer conductor). Although normally supplied with a power supply, any
regulated 12 Volt DC 1 amp supply can be used. The power supply can be used
with 110 or 240 VAC power.