Opticon ESL - Manual (Page 22)

Opticon ESL
DEMO KIT
User Manual
22
does not operate on the same RF channel as any nearby WIFI network to minimize
interference.
To detect which RF-channels are least active, the base station can perform an energy scan
on all 16 available channels and graphically show the energy levels in a real-time graph.
To start an energy scan simply press the „scan‟ button in a base station-tab of the server
application.
After checking which RF channels show least activity, one of these channels can be
selected by pressing the „Set Channel‟ button.
If the RF channel was changed the base station will automatically reset to apply the new
setting.
Be aware that any ESLs that were already associated with the base station before
changing the RF channel will lose their connection with the base station. By default it will
take 30 polls (times the poll interval of 15 seconds) before the ESLs will time out and start
looking for another base station.
To avoid having to wait a couple of minutes before the ESLs starts looking for the base
station on the new RF-
channel it‟s possible to disassociate all the ESLs from the base
station prior to changing the RF channel. This can be done using by pressing the „select all‟
button and then the „Remove‟ button. This will disassociate all ESL‟s from the base station
and the ESLs will start to disappear from the base station. Once they‟re all gone, quickly
change the RF channel and the ESLs should start to appear again on the new channel.
Be aware that ESLs don‟t search for base stations on all 16 RF channel, but only on a
configurable range of channels (default: channel 11 to 15). So if the RF channel of the base
station is set to a channel outside this range, the ESLs will not find the base station. For
this reason it‟s important to first configure the RF channel range on all ESLs before
configuring the base stations. (See chapter 5.4.5)
If an ESL is not associating to any base station and its RF channel range is unknown, then
configure a base station to channel 11. This channel will always be scanned by any ESL to
make sure they can always be found and reconfigured without having to look for it on all
channels.