MDS MDS iNET 900 Especificaciones descargar pdf (Pagina 16)

14 iNET Series Installation & Start-Up MDS 05-2873A01, Rev. E

AIMING DIRECTIONAL ANTENNAS

In general, signal levels stronger than –80 dBm will provide reliable

communication in the network. Directional antennas usually require

some fine-tuning of their bearing to optimize the received signal

strength. The unit has a built-in received signal strength indicator

(RSSI) that can be used as an aid to optimizing the received signal

level. The measurement and antenna alignment process usually takes

less than 10 minutes at each unit.

RSSI measurements and Wireless Packet Statistics are based on mul-

tiple samples over a period of several seconds. The average of these

measurements is displayed by the Menu System.

In the steps below, the path to the Menu System item is shown in bold

text.

Procedure

1. Verify the Remote is associated with an Access Point unit by

observing the LINK LED. It should be on or blinking.

2. View and record the Wireless Packets Dropped and Received

Error rates. This information will be used later.

Main Menu>Performance Information>Packet Statistics>Wireless

Packet Statistics

3. Read the RSSI level at the Remote.

Main Menu>Performance Information>RSSI by Zone

4. Optimize RSSI by slowly adjusting direction of antenna. Watch

the RSSI indication for several seconds after making each adjust-

ment so that the RSSI accurately reﬂects any change in the link

signal strength. The less negative the number, the stronger the sig-

nal.

5. View the Wireless Packets Dropped and Received Error rates at

the point of maximum RSSI level. They should be the same or

lower than the previous reading.

Main Menu>Performance Information>Packet Statistics>Wireless

Packet Statistics

If the RSSI peak results in an increase in the Packets Dropped and

Received Error, the antenna may be aimed at an undesired signal.

Try a different antenna orientation.

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MDS MDS iNET 900 Especificaciones Pagina 16