Appendix C - Rlx2-Ihx 5 Ghz Radio Dfs Support; Dfs Radio Operations - ProSoft Technology RLX2-IHx Series User Manual

RLX2-IHx Series ♦ 802.11a, b, g, n
Industrial Hotspots
9 Appendix C - RLX2-IHx 5 GHz Radio DFS
Support
Some channels in the 5 GHz band are shared with radar and must adhere to
Dynamic Frequency Selection (DFS) rules. If the radio detects the presence of
radar on its operating frequency, it must automatically change to another
frequency.
Note: This applies only to radios that can operate at frequencies in the 5 GHz band.
9.1

DFS Radio Operations

If radar is detected on an operating channel, transmissions must cease within the
required Channel Closing Transmission Time, and must move to a new channel
within the required Channel Move Time. Before transmitting on a new DFS
channel that has not been previously checked for radar, the RLX2-IHx series
radio must monitor the channel for the Channel Availability Check Time before
transmitting. Operations cannot return to a channel where radar was detected for
at least the Non-Occupancy Period. The values for these parameters are noted
in the table below:
Parameter
Channel Availability
Check Time
Channel Move Time
Channel Closing
Transmission Time
Non-Occupancy Period
If a Master radio detects radar, it issues a channel change announcement to all
Client and Repeater radios in the network. It then moves to a new channel within
the Channel Move Time. (Typically, this move time is 500 milliseconds or less.) If
the selected channel was not previously checked for the presence of radar, the
Master radio must do so for the Channel Availability Check Time before it can
begin to transmit. If the newly-selected channel is not a DFS channel, or if the
channel was previously monitored for radar since the radio was powered on,
transmissions can begin immediately.
ProSoft Technology, Inc.
FCC Value
60 seconds
10 seconds (12 seconds
for "long pulse" radar
200 milliseconds (plus
up to 60 milliseconds
over 10 seconds)
30 minutes

Appendix C - RLX2-IHx 5 GHz Radio DFS Support

ETSI Value ETSI Value
5.600 to 5.650 GHz
(Channels 120, 124, &
128)
60 seconds 10 minutes
10 seconds 10 seconds
1 second 1 second
30 minutes 30 minutes
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