jimj;295471 Wrote: > I don't see the correlation between unit of measurement and degree of > accuracy. Somewhere in the code it must convert from dBm to %. > Not necessarily. There is no fundamental reason that the hardware needs to produce a figure even vaguely proportional to dBm. > > That fact that wireless networking is primarily composed of black magic > and variables out of anyone's control is irrelevant. except that this makes measuring things in terms of real physical units like dBm is costly, and unnecessary for a wifi receiver > I.e. I want to know if I set two SB's next to each other and they each > get different signal strengths. And I will know that now, it's just > presented as a percentage instead of dBm that I'm used to working with > (i.e. unit of measurement doesn't matter). > Thanks, > Jim If the unit of measurement doesn't matter, what's wrong with percent?
The hardware will be producing a measuremnt value that has some relationship to the signal strength ( and/or possibly some secondary signal quality indicators like error rates). Expressing it as a percentage makes some sense as it is related to the range of values measurable with that hardware (although almost certainly not following linear, log or other 'nice' transfer function, nor very repeatable between units), possibly scaled to the limits of useable signal levels. However as soon as you call it dBm, this implies a relationship to 'real' physical values that may be completely misleading, unrealistic or just plain nonsensical, especially if the value is derived from secondary signal-quality indicators. -- mikeselectricstuff ------------------------------------------------------------------------ mikeselectricstuff's Profile: http://forums.slimdevices.com/member.php?userid=16264 View this thread: http://forums.slimdevices.com/showthread.php?t=46788 _______________________________________________ discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
