---- "Michał Kazior" <[email protected]> wrote: > On 15 June 2018 at 19:23, <[email protected]> wrote: > > ---- [email protected] wrote: > >> ---- "Michał Kazior" <[email protected]> wrote: > >> > Your noise floor readout in survey dump is terribly bad for 5GHz. It > >> > ain't stellar for 2.4GHz either but within reason nonetheless. > >> > > >> > Did you try using the card in a different device? I wonder if the > >> > device you're trying to use it in has some sort of internal noise on > >> > those frequencies and/or ath9k's ANI isn't able to deal with it. > >> > > >> > > >> > Michał > >> > > >> > On 15 June 2018 at 15:31, <[email protected]> wrote: > >> > >> I did. > >> I took it out of the Penguin-Z notebook and put it in a Dell XPS15 9560 > >> running Windows 10. Only 2.4Ghz networks were visible from there as well. > >> Not exactly apples-to-apples, but consistent results. > > This reduces likeliness this is tied to a os/driver issue. Maybe > calibration data on the device eeprom is broken? Or maybe it's a > hardware defect?
I have three of these cards all with the same problem, so if it's a hardware defect then it's pretty much game over and these cards are all useless. Forgive my ignorance, but is there any way to check/fix calibration data? > > > > Could it be antenna related (in multiple devices)? > > Antennas can be designed to work better on certain frequency ranges. I > wouldn't expect such a dramatic effect though. > > > > On wikidevi.com I see some M.2 cards listed with an antenna connector of > > U.FL and others with MHF4. I can't find anything describing the difference, > > if any. The connectors seemed to fit OK. Also, what's the deal with 'main' > > and 'aux' antenna connectors? I've seen people suggest swapping them has > > helped in some cases with poor signal, while others insist that it makes no > > difference. I have not tried swapping the connectors. > > I think it's not a connector problem because 2.4GHz scan results > report reasonable signal strength for found APs (-60dBm). My > experience is that if you use a wrong (but seemingly fitting) > connector you'd get near 0 results or below -90dBm across the board. > > > Michał
