User`s guide

HN-2010

Guidelines for Installation

When installing your system, always consider the following points:

• Directional antennas are best for remote unit sites. They may increase the cost,

but they confine the transmission path to a narrow lobe and minimize the

interference from nearby stations.

• For systems with constant interference present, you may need to change the

polarity of the antenna system and reduce data streams. Groups of short data

streams are more reliable and have a better chance of success in the presence

of interference than do long streams.

• Systems installed in rural areas are least likely to encounter urban

interference.

• Multiple HopNet systems can operate in close proximity to each other but

require a unique network address.

• Poor quality coaxial cables will seriously degrade system performance. Use

low- loss cable that is suitable for 2.4 GHz operation.

• Short cable runs minimize signal loss.

Guidelines for Placing the Repeater

Follow these guidelines for placing the repeater:

• Be sure to carefully select the geographical location of the repeater station. A

site must be chosen that allows good communication with both base station

and remote site. This is often on top of a hill, building, or at a firewall for

indoor applications.

• Be sure to install two antennas at the repeater station⎯one for each

transceiver. Be sure to take precautions to minimize the chance of

interference between these antennas.

• Employ vertical separation to prevent interference with repeater antennas. In

this arrangement, mount one antenna directly over the other separated by at

least 4 feet.