User's Manual

Wireless connectivity between radio-equipped portable terminals and host computers is unique and

maintaining this wireless connectivity over a wide area is fundamental to the usefulness of the network.

As such, the scope and reliability of radio coverage is a primary concern. Therefore, one of the most

important features of the wireless network is the degree of radio coverage provided. Coverage is

influenced by terrain, buildings or a crowded room. There are many things that can be done to improve

coverage depending on location.

In any location

1. Performance can vary significantly at different times of the day.

2. Weather can affect performance.

On the street

1. Try all sides of a building to see which side provides the strongest radio signal.

2. Move from under trees. Pine needles absorb radio signals more than leaves.

3. Move away from overhead electrical wires.

4. Radio signals reflect off other buildings. Even in the signal shadow, the signal could be reflected

back by another building.

5. Try not to hold the unit. If possible, place it in vehicle, on a cabinet or desk.

6. If holding the unit, turn the unit in 90-degree increments to avoid shielding it with your body.

7. The signal is 1 - 2 feet across; therefore, moving several feet in any direction may give different

results.

Inside a Building

1. Move toward windows.

2. Signals do not penetrate ground, therefore, there will probably be no signal in basements.

3. Reflective coatings on windows reflect radio signals. Try the side of the building, the least likely

to have coated windows.

4. Closed metal blinds can reflect radio signals.

5. Dropped ceilings sometimes hide an accumulation of electrical cable.

Electromagnetic Interference (EMI)

1. Electromagnetic Interference (EMI) is generated by switching circuitry closets or Un-interruptable

Power Source

(

UPS

)

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