decibels above 1 femtowatt
decibels above 1 femtowatt
[′des·ə·bəlz ə¦bəv ¦wən ′fem·tō‚wät] (electricity)
A power level equal to 10 times the common logarithm of the ratio of the given power in watts to 1 femtowatt (10-15 watt). Abbreviated dBf.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.