User's Manual Part 2
Release8InstallationandConfigurationGuide
Issue2,November2007 Draft5forRegulatoryReview 277
IMPORTANT!
In the 2.4-GHz frequency band, the SM can register to an AP that transmits on a
frequency 2.5 MHz higher than the frequency that the SM receiver locks when
the scan terminates as successful. This establishes a poor-quality link. To
prevent this, select frequencies that are at least 5 MHz apart.
In a 2.4-GHz SM, this parameter displays all available channels, but has only three
recommended channels selected by default. See 2.4-GHz AP Cluster Recommended
Channels on Page 137.
In a 5.2- or 5.4-GHz SM, this parameter displays only ISM frequencies. In a 5.7-GHz SM,
this parameter displays both ISM and U-NII frequencies. If you select all frequencies that
are listed in this field (default selections), then the SM scans for a signal on any channel.
If you select only one, then the SM limits the scan to that channel. Since the frequencies
that this parameter offers for each of these two bands are 5 MHz apart, a scan of all
channels does not risk establishment of a poor-quality link as in the 2.4-GHz band.
A list of channels in the band is provided in Considering Frequency Band Alternatives on
Page 136.
(The selection labeled Factory requires a special software key file for implementation.)
Color Code
Color code allows you to force the SM to register to only a specific AP, even where the
SM can communicate with multiple APs. For registration to occur, the color code of the
SM and the AP must match. Specify a value from 0 to 254.
Color code is not a security feature. Instead, color code is a management feature,
typically for assigning each sector a different color code. On all Cyclone modules,
the default setting for the color code value is 0. This value matches only the color code
of 0 (not all 255 color codes).
RECOMMENDATION:
Note the color code that you enter. Ensure that you can readily associate this
color code both with the module and with the other data that you store about the
module.
External Filters Delay
This parameter is present in only 900-MHz modules and can have effect in only those
that have interference mitigation filter(s). If this value is present, leave it set to 0,
regardless of whether the SM has an interference mitigation filter.