User manual
SM User Manual January 2004
Software Release 4.1
8.10.1 SM Modes
The Alignment web page provides tools to assist in the alignment of an SM to an AP. Whether and
how these tools operate depends on the mode that the operator invokes. The following modes are
available:
• Normal Aiming Mode
• RSSI Only Aiming Mode
• Operating Mode
Regardless of the mode that the operator selects to align the module, all of the following indications
are required for an acceptable link between the modules:
• RSSI greater than 700
• jitter value between 0 and 4 in Release 4.0 and later releases or between 5 and 9 in
any earlier release
• uplink efficiency greater than 90%
• downlink efficiency greater than 90%
NOTE: If any of these values is not achieved, the SM may be operational but manifest
occasional problems. In Release 4.0 and late releases, RSSI measurement is more
consistent and jitter control is improved.
In either aiming mode, either the Alignment page must be set to automatically refresh or the
operator must repeatedly click the Enable Aiming Mode button to keep current data displayed as
the module is moved. After 15 minutes in an aiming mode, the module is automatically reset into
the Operating Mode.
8.10.2 Normal Aiming Mode
In the Normal Aiming Mode
• the screen displays the RSSI level and the jitter value.
• the five left-most LEDs in the module act as a bar graph that indicates the best
achieved RSSI level and jitter value when the greatest number of LEDs is lit. (The
colors of the LEDs are not an indication in this mode.)
To invoke the Normal Aiming Mode, the operator
1. ensures that the Disabled button on the RSSI Only Mode line is checked.
2. clicks the Enable Aiming Mode button. (The aiming procedure is described on Page 79.)
8.10.3 RSSI Only Aiming Mode
In the RSSI Only Aiming Mode, the screen displays the signal strength based on the amount of
energy in the selected frequency, regardless of whether the SM is registered to the AP. This mode
simplifies the aiming process for long links, such as where the module is mounted to a Canopy
Passive Reflector.
Issue 5 Page 112 of 119