I have just installed a bit of software which scans and records the
local to me WiFi signals....

With my own AP set up to use 11, the scanner shows me on 11 + 7. If I
swap the AP channel to 1, it shows as 1 +5. My signal seems to span
over both of those channels. Some of the others show as occupying two
channels, some as just the one - why two please?

One of the (not mine) AP's most of the time shows as -85dB, but every
few minutes it rises to -10db for a few seconds - why? This one shows
as two channels, but only seems to be three wide.

Harry Bloomfield wrote:

With my own AP set up to use 11, the scanner shows me on 11 + 7. If I
swap the AP channel to 1, it shows as 1 +5

Is your AP set for 40MHz wide channels, rather than the usual 20MHz?

On 26/10/16 13:33, Harry Bloomfield wrote:
I have just installed a bit of software which scans and records the
local to me WiFi signals....

With my own AP set up to use 11, the scanner shows me on 11 + 7. If I
swap the AP channel to 1, it shows as 1 +5. My signal seems to span over
both of those channels. Some of the others show as occupying two
channels, some as just the one - why two please?


two channels can be used to get higher bandwidth.

One of the (not mine) AP's most of the time shows as -85dB, but every
few minutes it rises to -10db for a few seconds - why? This one shows as
two channels, but only seems to be three wide.

No idea. Maybe the protocol is t0o transmit the SSID only, every few
seconds.

--
"If you dont read the news paper, you are un-informed. If you read the
news paper, you are mis-informed."

Mark Twain

Andy Burns formulated on Wednesday :
Harry Bloomfield wrote:

With my own AP set up to use 11, the scanner shows me on 11 + 7. If I
swap the AP channel to 1, it shows as 1 +5

Is your AP set for 40MHz wide channels, rather than the usual 20MHz?

I found it in the 'advanced settings' - 300Mbps, 270 and 130. Either
270 or 130 brings it down to centering on a single channel, the 300
occupies double width. Thanks!