FYI - There is an excellent. user-friendly website for interactive radio link budget calculation, including dBm <-> watt computation. It includes extensive explanations useful for both newbies and experienced users. It's in Switzerland of all places, but do check it out...
http://www.swisswireless.org/wlan_calc_en.html the site has canned formulas for 2.4GHz, 5GHz and 17GHz links, and also works in French and Spanish. Bob Marsh Berkeley, CA ----- Original Message ----- From: "Brian Lloyd" <[EMAIL PROTECTED]> To: "Jacques Caron" <[EMAIL PROTECTED]> Cc: "Timolthy Keithy" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Thursday, August 07, 2003 3:22 PM Subject: Re: [BAWUG] Converting from dBm to milliwatts and vice versa. > > Rule is: > > > > dBm = log10 (mW)*10 > > or: > > mW = 10^(dBm/10) > > > > Which means: > > 0 dBm = 1 mW > > 10 dBm = 10 mW > > 14 dBm = 25 mW > > 15 dBm = 32 mW > > 16 dBm = 40 mW > > 17 dBm = 50 mW > > 20 dBm = 100 mW > > 30 dBm = 1000 mW = 1W > > If you remember that +3db = *2, -3db = /2, and +10db = *10 you can do all kinds of quick in-your-head calculations. > > +3db = *2 > +6db = *4 (2*2) > +7db = *5 (+10db-3db = 10/2) > +4db = *2.5 (+10db-6db = 10/4) > +1db = *1.25 (+4db-3db) > > -- > > Brian Lloyd 6501 Red Hook Plaza, Suite 201 > [EMAIL PROTECTED] St. Thomas, VI 00802 > +1.340.998.9447 - voice +1.360.838.9669 - fax > GMT-4 > > -- > general wireless list, a bawug thing <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
