Display factor
The display factor is that factor which is introduced into the calculation of ranges of radar reflectors, to allow for the fact that the signal must exceed the noise level by a certain minimum value before the signal is visible on the P.P.I.
The factor includes such variables as brightness setting of the cathode ray tube, the receiver gain level, intensity of ambient lighting and the adaptation of the operator to ambient lighting conditions.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
