Zašto radi moj mikrovalni kraj ubiti moj Wi-Fi povezivost?

Every time I start the microwave in the kitchen, our home Wi-Fi stops working and all devices lose connection with our router! The kitchen and the Wi-Fi router are in opposite ends of the apartment but devices are being used a little here and there. We’ve been annoyed by the instability of the Wi-Fi for some time and it wasn’t until recently we realized it was correlated to microwave usage.

After some testing with having the microwave on and off we could narrow down the problem to only occurring when the router is in

i koristi skup kanal. Ako se promijenim

način rada ili postavljanje kanala u

onda više nema problema … ali još uvijek!

Usmjerivač je Zyxel P-661HNU ("802.11n bežični ADSL2 + 4-portni sigurnosni pristupnik" s najnovijim firmverom), a mikrovalna pećnica proizvodi Neff s učinkom od 1000 W (ako bi to bilo korisno). Na routeru se nalazi svjetlo "internetske veze" i ne izađe kad dođe do prekida, pa mislim da je to samo unutarnji Wi-Fi problem.

Sada na moje pitanje:

• Koji dijelovi Wi-Fi mreže mogu utjecati mikrovalna uporaba? Frekvencija? Poremećaji u električnom sustavu?

• Kako postaviti

  Auto

  na

  channels

  napravi razliku? Mislio sam da su različiti kanali samo neka vrsta sustava odvajanja unutar istog frekvencijskog spektra?

• Je li ovo mogao biti znak da je mikrovalna pećnica neispravna i polako nas pržila kod kuće? Je li potrebno zabrinuti?

Budući da smo uspjeli pronaći postavke usmjerivača koji dobro surađuju s našom mikrovalnom potražnjom za pažnjom, ovo je pitanje uglavnom iz znatiželje. Ali kao i većina ljudi tamo … jednostavno ne mogu pomoći činjenici da moram znati kako je to moguće:-)

Uobičajeno je da Wi-Fi usmjerivač uzrokuje probleme drugih elektronike (npr. Wi-Fi interferira s monitorom za bebe), a ne obično u suprotnom smjeru. Što se ovdje događa?

Odgovor

SuperUser suradnik Bob nudi uvid u razlog zbog kojeg mikrovalna pećnica uzrokuje takve probleme:

802.11 (b/g/n) typically operates on the 2.4 GHz band. This is conveniently the same/very close to the band that your microwave oven emits. It’s also an ISM band, which can be freely used at low power without licence – it was originally supposed to be used for non-communication purposes, but the lack of a licence requirement makes it very attractive.

Most microwave ovens tend to be very well shielded and will not emit enough radiation[*] to interfere with wireless communications. It is possible that your unit has a damaged shield. You could look into replacing it.

A better thing to do would be to upgrade your wireless networking equipment and devices (note that many, especially older, devices are 2.4 GHz only) to be 5 GHz compatible (used with 802.11 a/n). This is the other major band WiFi networks can operate in (though 2.4 is far more common), and should not suffer interference from microwave ovens.

Addressing your [question about] different channels, microwave ovens (which should label the output frequency somewhere) should use ~2.450 GHz.

WiFi (b/g/n) channels typically range from 2.412 GHz to 2.472 GHz, with a bandwidth of 20 MHz and a 2 MHz band gap. If you pick a channel from the upper or lower end, and assuming your microwave oven is precise enough with its frequency, you could sidestep it entirely. This is, however, just a guess.

[*] I must point out that 2.4 GHz is far from ionising radiation, which is at least 2400000 GHz (the type that can harm human tissue and/or cause cancer). Even if the shield is faulty, it will not cause any harm. Any (very slight) damage would be caused by heating (and not directly by ‘radiation’), which you most definitely will feel before any real damage. Also, just don’t stand in front of it for hours a day. That always helps.

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