[MVMA] Ray, KD8PNV, got a TDWR alert on a 5 GHz WiFi device

[Moe]

On 4/3/19 12:17 PM, Chuck Gelm wrote:
> Ray, KD8PNV, mentioned that he got a TDWR alert on a 5 GHz WiFi device, so
> I did some research. Images of profiles and street maps and a 
> satellite view
> here:
> http://nc8q-mesh-server.local.mesh/mesh/images/2019/TDWR-Troy/
>
>  Looks like all the AREDN channels are clear of the Dayton(Troy) TDWR 
> station
> on 5640 MHz.
>
> Terminal Doppler Weather Radar

The FCC outright bans Wi-Fi use of TWDR primary channels 120 (5600 MHz), 
124 (5620 MHz), and 128 (5640 MHz),
as well as:
adjacent channel 116 (5580 MHz) within 35km of a TDWR operating between 
5600 MHz and 5610 MHz, and
adjacent channel 132 (5660 MHz) within 35km of a TDWR operating between 
5630 MHz and 5650 MHz.

AREDN 5.8 devices operate between Channel 133 (5665) and Channel 184 (5920).

Where you can interfere is when using the AREDN Wi-Fi scan. Hence, ever 
since firmware 3.18.9.0, conducting a Wi-Fi Scan requires the control 
operator's root password.

-- 
Moe
73 de AB8XA
When all else fails...
Ham Radio WON'T be there
if it depends on all else.