1. joelaze's Avatar
    Hi, my dBm signal is always inconstant and continuosly changing values.
    Is this normal???Is my antenna ruined??Sometimes the signal is on 60 then starts to go up to 90 and then sudenly drops to 57, 60.
    Thanks
    10-19-09 05:01 AM
  2. GooTz66's Avatar
    Hi, my dBm signal is always inconstant and continuosly changing values.
    Is this normal???Is my antenna ruined??Sometimes the signal is on 60 then starts to go up to 90 and then sudenly drops to 57, 60.
    Thanks
    Here is a simple comparison breakdown of bars to signal:

    1 bar ~ -102 to -120 dBM
    2 Bars ~ -93 to -101 dBM
    3 Bars ~ -87 to -92 dBM
    4 Bars ~ -78 to -86 dBM
    5 Bars ~ -40 to -77 dBM

    Depending on your network/carrier and their coverage the number can fluctuate quite a bit which is normal. For me, i.e. in my home i fluctuate between 3-5 bars depending which room i am in.
    10-19-09 05:14 AM
  3. joelaze's Avatar
    Ok, thanks, but if your phone is in one room without anyone touching, the signal stabilizes???
    10-19-09 05:35 AM
  4. Motorcycle Mama's Avatar
    Radio waves are never stable. They are constantly in flux by their very nature.
    10-19-09 06:02 AM
  5. Pete6's Avatar
    Motorcycle Mama is absolutely correct. Unless you understand the logarithmic nature of the decibel scale, you are best off leaving the signal strength as bars.


    The table jgutie6634 posted should convince you of this.

    1 bar ~ -102 to -120 dBM
    2 Bars ~ -93 to -101 dBM
    3 Bars ~ -87 to -92 dBM
    4 Bars ~ -78 to -86 dBM
    5 Bars ~ -40 to -77 dBM

    1 decibel (dB) is the smallest amount of sound change that the human ear can detect.
    3.5 dB is double the signal power and 60dB is a million times greater.

    0 dB is 0.775 volts into 600 ohms.

    If you really want to drive yourself nuts, here is the best site I know of to convert dB to volts dB dBu dBV to volts conversion - calculator volt volts to dBu and dBV dB mW - convert dB volt convertor converter calculation online attenuation loss gain ratio reference audio engineering dBFS dBVU 0 dB audio level converter peak to peak impedance v
    10-19-09 06:38 AM
  6. joelaze's Avatar
    Ok, thank you all!!
    My question was only to see if this could be the problem that is making my battery draining like crazy!!!
    But it seems to me that the antenna is working fine!!
    10-19-09 08:13 AM
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