Casio DT-X100 Series Software Manual page 79

* The restriction on high-speed communication (11n) is offered as an option because 11n
communication has more cases than other models of failure to communicate correctly with certain
access points, due to compatibility problems.
However, speed reduction must be taken into consideration, and it is necessary to check the state
of speed reduction in the actual usage environment.
(4) Scan channel selection
Restricting the channels to scan suppresses redundant signal output and improves scan time. This
channel selection is superseded by country-specific settings and communication standard settings.
(Example 1) If Europe is selected in country-specific settings, 14ch will not be scanned even if 14ch
is selected here.
(Example 2) If 11bgn is selected in communication standard settings, these channels will not be
scanned even if the 5GHz band is selected.
(5) Select the priority frequency band
In an environment where two or more access points with identical SSID code exist and they support
both the 2.4GHz and the 5GHz bands, this selection sets which frequency band is prioritized for
connection.
The priority frequency band selection is set by frequency band (2.4GHz/ 5GHz) and valid range.
The valid range is the range of signal strength in which the priority selection is valid, in the form
(roaming threshold+N) dBm. This is intended to prevent excessive roaming operations when the
terminal connects to access points with inadequate signal strength because of the priority frequency
band selection.
Connection priority ranking for access points with the same SSID
No selection of priority
frequency
[1] Signal strength (RSSI value) is high
[2] Signal quality is good
[Caution]
(1) This function cannot guarantee that it is possible to connect to an access point in the priority
frequency band, due to access point detection conditions.
Example) When scanning for access point connection only detects access points in the
non-priority frequency band
(2) The priority frequency band selection only operates on the access point selection when making
a connection or using roaming.
Therefore, even if the environment satisfies the selection conditions after a connection is made,
the connection will not switch automatically. Switching requires action, such as cutting the
connection and reconnecting, or roaming.
Priority frequency selected
[1] The priority frequency band channel, and
signal strength (RSSI value) is in the valid
range or above
[2] Signal strength (RSSI value)
[3] Signal quality
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