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Lose a little bit of wireless signal with Nintendo Wii....

Discussion in 'Tomato Firmware' started by FattysGoneWild, May 3, 2009.

  1. FattysGoneWild

    FattysGoneWild LI Guru Member

    Linksys WRT54GL v1.1 using non ND Tomato version. As for wireless. We have a laptop with Atheros card online and Nintendo Wii. When the Wii is not on. The signal stays on excellent with the laptop. When the Wii comes on. It drops to very good. Why is that happening? I also notice the signal dropping in Tomato to 28-35 when Wii is on. When its not on. The laptop will stay in the 40's. Laptop is straight across in the next room from me. Wii is out in the living room. 1 thing to note. I did back down the transmit power to 28mW. Since that is what the stock Linksys firmware uses. And I heard any thing above that. You are just spewing out extra garbage and it can actually effect the signal. Maybe the Wii just has crappy wifi?
  2. Toastman

    Toastman Super Moderator Staff Member Member

    The router is negotiating a link speed with two different clients. The lowest common negotiated connection speed will be used while both clients are using the router at the same time. The routers can also vary their transmit power with speed - the higher the connection speed, usually more transmit power is used.

    It looks like your Wii is connecting at a lower speed, which results in the router dropping it's power level, so your other machines see a reduced signal while the Wii is online.

    You should not pay much attention to many of the comment in the different forums by people who do not really understand the technology or the terms used. The "extra garbage" - noise - is caused by overdriving an amplifier so that it becomes nonlinear. (Similar to driving a Hi Fi amplifier into distortion). An increase in power results in a little more nonlinearity, then a transition point is reached when it overloads and generates noise, spreading onto other channels, and also distorts the modulation waveform so that the distant receiver begins to drop packets. Typically on a 54GL this is around 150mW, at which point MOST 54GL's don't produce much extra noise. This may not apply to other models or makes. Also, note that the selected figure of 150mW in the GUI varies in the ACTUAL power between the different firmwares. So play safe and stick to less than 100mW if you like. However, 84mW is generally regarded as being a very safe figure. What you are looking for is the difference between the signal and the noise figures, which is the signal to noise ratio. This is given in the "Quality" column in Tomato. It is this QUALITY figure that is the most important thing, aim for the highest you can get. If it drops instead of improving when you increase power, this is a sign that the amplifier is being driven into distortion, so you must then go back to the last level.

    So the Wii is probably just receiving a weak signal because it is in a different room, causing it to negotiate a lower connect speed than your other machines.
  3. FattysGoneWild

    FattysGoneWild LI Guru Member

    Very informative. Thanks!

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