Miks minu mikrolaineahjus käitub minu Wi-Fi-ühenduvus?

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

režiimis ja kasutab määratud kanalit. Kui ma muudan

režiim või määrake kanal

siis pole enam probleemi … aga ikkagi!

Ruuter on Zyxel P-661HNU ("uusim püsivara" 802.11n Wireless ADSL2 + 4-port Security Gateway) ja mikrolaineahi teeb Neff efekti 1000W (kui see teave võib olla kasulik kõigile). Marsruuteril on "internetiühendus" ja see ei lülitu välja katkestamise ajal, nii et arvan, et see on ainult sisemine WiFi-probleem.

Nüüd minu küsimustele:

• Milliseid Wi-Fi osasid mikrolaineahju võib mõjutada? Sagedus? Häired elektrisüsteemis?
• Kuidas saab seada

  Auto

  on

  channels

  muuta? Ma arvasin, et erinevad kanalid olid just selline eraldussüsteem samas sagedusspektris?

• Kas see võib olla märge, et mikrolaineahi on talitlushäire ja aeglaselt küpsetades meid kõik kodus? Kas on vaja muretseda?

Kuna meil õnnestus leida ruuteri seaded, mis teevad hästi meie mikrolainete nõudlust tähelepanu järele, on see küsimus peamiselt uudishimu. Kuid nagu enamus inimesi seal … Ma lihtsalt ei saa aidata seda, et ma pean teadma, kuidas see on võimalik:-)

Tavaliselt on Wi-Fi-ruuter, mis tekitab muid elektroonikaid (nt Wi-Fi häirib beebimonitorit), kuid mitte tavaliselt, vastupidi. Mis siin toimub?

Vastus

SuperUseri kaastöötaja Bob pakub mõningast ülevaadet sellest, miks mikrolaineahjus tekivad sellised probleemid:

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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