Enhanced RX Sensitivity for Buffalo WHR-HP-G54

Discussion in 'Tomato Firmware' started by cpgbg, Apr 30, 2008.

  1. cpgbg

    cpgbg LI Guru Member

    After installing the latest version of Tomato I have cleared NVRAM.
    Navigating to Advanced | Wireless I saw that the Enhanced RX Sensitivity options shows Disable by default, although the other option is Enable *. There is a text saying The default settings are indicated with the asterisk * symbol.
    So I am really wondering which enables and which disables that function and what the default value is.
    Anyone can help with this?
  2. LLigetfa

    LLigetfa LI Guru Member

    Jon did note that some people may run into issues with it and to check it if need be.

    What's the difference which is the default? Just set it to what works best for you and move on.
  3. cpgbg

    cpgbg LI Guru Member

    I don't care what the default is but I am not sure that Enable * really enables the Enhanced RX Sensitivity, it may be enabled when Disable is selected.
  4. cpgbg

    cpgbg LI Guru Member

    I have made some tests with a Laptop and I get better throughput when Enhanced RX Sensitivity is set to Disable.
    Has anyone else tested this?
  5. LLigetfa

    LLigetfa LI Guru Member

    I tested it and got better results with it enabled in the newer versions. In the older Tomato versions it was the other way around.
  6. Phoenixxx*

    Phoenixxx* Addicted to LI Member

    I think it is a bug of tomato!

    This is from the DD-WRT Wiki!
    Default boardflags of stock firmware and cleared nvram tomato is 0x3758.
    nvram set boardflags=0x3758 -> best settings for my environment (400m, 2x whr-hp-g54 with biquads).

    There were many discussions about this issue in the DD-WRT Board.
  7. LLigetfa

    LLigetfa LI Guru Member

    Yes there were, and there was never any consensus on it either. One user would change the wiki and another would change it back.

    I don't know if it is individual environments that can make the difference or if there are different hardware revisions at play but to this day there still is not consensus. Instead of citing a wiki as God's word, set it on or off, whatever works best for you, and move on.
  8. cpgbg

    cpgbg LI Guru Member

    OK, I tried this
    # nvram get boardflags
    1. This is the default value I get after NVRAM erase.
    2. The Advanced | Wireless page shows:

    Amplifier: Enable *
    Enhanced RX Sensitivity: Disable

    3. I get better results when Enhanced RX Sensitivity is set to Disable
    4. I think that it will be stupid if this function is disabled by default by Buffalo.

    So my opinion: Tomato repots wrong value for this setting.
  9. LLigetfa

    LLigetfa LI Guru Member

    What does "better" mean to you? Post the actual numbers you see including noise floor.
  10. LLigetfa

    LLigetfa LI Guru Member

    In Tomato with boardflags of 3758 I get RSSI of -62 but with 2758 I get RSSI of -48

    In dd-wrt RC7 with boardflags of 3758 I get RSSI of -51 but with 2758 I get RSSI of -43
  11. kzrssk

    kzrssk LI Guru Member

    I haven't gotten any numbers, but when it was enabled, my connection would slow to a crawl then completely drop if I did anything intensive (like copying a 50 or 100 MB file from another computer). When it was disabled, it stayed at 54 Mbps and was fine.
  12. cpgbg

    cpgbg LI Guru Member

    @LLigetfa, when the setting is Enable * it shows better quality but the throughput is a lot worse. Don't look what it says about quality but do real testing with real transfer. Measure the time for copying a large file or use utility like iperf to test throughput.
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