Which GUI based firmware has highest TX power

Discussion in 'Cisco/Linksys Wireless Routers' started by valhalan, Oct 1, 2006.

  1. valhalan

    valhalan Guest

    I have a WRT54GL v. 1.1.

    I'm wanting to play around with a GUI based firmware with the highest trasmit power setting. I am using DD-WRT Ver. 23 SP1. I have mine set to 249mw. The max setting is 251. I realize the risks of overheating, and basically ruining the router.

    Would anyone know which is the best to use with the highest rate? I think I may be using it now. Extreme noob here when it comes to the routers.
  2. Toxic

    Toxic Administrator Staff Member

    most users would keep it under 100mW. Over this level, the signal on the channel you are using gets "dirty" and bleeds into other channels.
  3. grcore

    grcore Network Guru Member

    Extreme noob indeed.

    1. Increasing tx power only helps if your client has enough tx power to transmit back to the AP. Its a two-way street.

    2. Increasing tx power does not heat up the unit. The majority of the heat inside your WRT is generated by the switch chip. The radio does not get any hotter at 250mw.

    3. The radio gets real sloppy when cranking the power up. It will crush adjacent channels, and will increase noise a great deal also.

    4. Unless you know WTF your doing, I.E. matching the SWR of your antenna, using directional antenna's properly, and using the lowest tx power needed to maintain links properly. You are better off just using power settings lower than 70mw (find what works best for you).

  4. eric_stewart

    eric_stewart Super Moderator Staff Member Member

    Might be a noob but at least he admits it. Not necessary to rub his nose in it. No flame intended BTW but it will be pretty hard to get people to ask questions if we tell them they're stupid.

  5. HennieM

    HennieM Network Guru Member

    To answer your original question: The firmware has little to do with the Tx power. The firmware just sets the hardware, but the hardware does the actual Txing and Rxing. The max of the hardware, AFAIK, is 251mW.

    grcore, which switch chip gets hot?
  6. ivo_1985

    ivo_1985 LI Guru Member

    These 251 mWs are not real! When you set the router to work at 251 mW, you just set it to highest possible level, that it can work. That's why you may have problems. 100mW are great in outdoor 360o conditions. And again - that is not real 100 mW! Also there is a differents in transimition power in B and G mode. When you use 54Mb - the signal is lower than 11 and 1 Mb B mode!
  7. HennieM

    HennieM Network Guru Member

    Don't wanna argue ivo_1985, but I think you may be confusing Tx power used or set vs. receive sensitivity. G mode uses a different modulation from B mode, so signal detection may be perceived different by a device. But the main one being receive sensitivity - the receive sensitivity usually increases as the bitrate goes down, so the effective signal strength goes up.
  8. ivo_1985

    ivo_1985 LI Guru Member

    No, I'm not confusing with nothing. Sensitivity: -72 dBm 54Mb -95 dBm 1 Mb. When set router to 1 Mb the transmit signal is much stronger than 54 Mb mode.
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