01-26-2019 09:41 AM
could someone explain the difference between DFS channel and Non DFS channel in regards to throughput, performance, advantage and disadvantge. what is the purpose of calling and putting certain channels as DFS channels.
01-26-2019 11:49 AM
A quick Google search found these:
In practical terms, a radio that intends to transmit
on a DFS channel must listen on the channel for
a minimum time period to determine if a radar
signal is present. If so, it must not transmit; it
can continue to test. If other channels are
available, the radio proceeds to the next one.
A radio must also re-test at intervals and cease
transmission if it finds radar activity.
So don't expect a DFS channel to link up quickly--
as non-DFS channels will; there's always a delay.
And of course if there's DFS activity, the channel
will be unavailable. But once a channel is linked,
it is as useful as any other in the band.
In practice, you should check for the kind of doppler
wind-shear radar in use at airports within your
vicinity and avoid their use. In Europe, many or
most channels may be 'DFS', but that doesn't
indicate that DFS is actually in use in your area. Dave
> HQ in Seacoast region New Hampshire U.S.A.
> Ubiquiti Certified Trainer [UCT] for:
UBWA [AirMax] / UEWA [UniFi] / UBRSS [routers]
01-28-2019 12:01 PM