
Refer to following example about group channel.
Following example is supposed that in case of other equipment uses the same frequency, as this
product’s after this product is installed and running.
Use this after confirming the vacancy channels by main unit or field intensity monitor in setting
tool.
×
Usable frequency for KR20
Frequency other equipment uses
Impossible to communicate
○
Possible to communicate
00ch
Frequency
1. [When using fixed channel 00ch]
×
In case of using fixed channel 00ch, if other equipment uses the same frequency as 00ch,
00ch is blocked and it might not be able to communicate.
00ch 0Bch
Frequency
2. [When using group channel 60ch]
○
×
In case of using group channel 60ch (00ch, 0Bch:fixed channel), if other equipment uses the
same frequency as 00ch, 00 ch is blocked but it automatically selects 0Bch that is in good
radio condition, and possible to communicate.
00ch 0Bch 16ch 21ch 2Cch 37ch 42ch
Frequency
3. [When using group channel E0ch]
○
×
○
×
×
×
○
In case of using group channel E0ch (above 00-42ch:fixed channel), if other equipment uses
the same frequency as 00 to 21ch, 00 to 21 ch are blocked but it automatically selects
frequency from 2C-42ch that is in good radio condition, and possible to communicate.
In place where wireless LAN is used, approx 20 channels are blocked as ex.3, but it is
possible to communicate without interference by using group channel.
As showed in above example, it is possible to avoid interference by using group channel
because it can connect if there is only 1 channel in good radio condition. When using group
channel, it searches the vacancy channel and then starts communication. So it takes time to
change channels and communication time becomes longer. The communication time
becomes long increasing of the channels: fixed channel -> 2ch group -> 3ch group ->… ->
11ch group.
2-8
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Содержание KR20
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