User manual

SM User Manual January 2004
Software Release 4.1
Ethernet Interface
This field indicates the configuration of the Ethernet interface on the module.
Session Status
This field displays the following information about the current session:
• Scanning indicates that this SM currently cycles through the RF frequencies that are
selected in the Configuration page. (See Custom RF Frequency Scan Selection List on
Page 87.
• Syncing indicates that this SM currently attempts to receive sync.
• Registering indicates that this SM has sent a registration request message to the AP
and has not yet received a response.
• Registered indicates that this SM is both
− registered to an AP.
− ready to transmit and receive data packets.
• Alignment indicates that this SM is in an aiming mode. See
− Table 11 on Page 70.
− Alignment Page on Page 111.
Registered AP
This field displays the IP address of the AP to which this SM is registered.
RSSI
This field displays the current RSSI (Radio Signal Strength Indicator) if the module is registered to
an AP. An acceptable link has an RSSI of greater than 700. However, to achieve the best link
possible, the alignment of the module should balance good RSSI values against good jitter values.
NOTE: Unless the page is set to auto-refresh, the value displayed is the RSSI value at the
instant the Status page was called. To keep a current view of the RSSI, the browser screen
must be refreshed or the page must be set to auto-refresh.
Jitter
This field displays the quality of the currently received signal if the module is registered to an AP.
An acceptable link has a jitter value between 0 and 4 in Release 4.0 and later releases or between
5 and 9 in any earlier release.
However, to achieve the best link possible, the alignment of the module should balance good jitter
values against good RSSI values.
NOTE: Unless the page is set to auto-refresh, the value displayed is the jitter value at the
instant the Status page was called. To keep a current view of the jitter, the browser screen
must be refreshed or the page must be set to auto-refresh.
Air Delay
This field displays the distance in feet between this SM and the AP. To derive the distance in
meters, the operator should multiply the value of this parameter by 0.3048. Distances reported as
less than 200 feet (61 meters) are unreliable.
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