VERIFICATION OF SYNERGISTIC EFFECTS 



The presence of the various interacting effects of combined environments 

 and their contribution to the overall degradation in performance of an if/am 

 amplifier module were verified by subjecting three if/am amplifier modules to a 

 3x3x3 full-factorial test. 



The regression equation which relates the output power of the if/am am- 

 plifier module to the environmental factors will be derived for the test data. 



Tables 2 through 7 show the levels of the environments along with the 

 output power of each module. The enormous number of data involved necessitated 

 the use of a computer to facilitate calculations in the derivation of the regression 

 equation. 



In the 3x3x3 full-factorial test, the general regression equation contains 

 26 terms and takes the form shown below. 



P = 6q+ bj + b^H + 63V + bj^ + b^H^ + 5gV2 + b^TH + b^^HV + b^VT 



+ b^J^H^ + b^^trV^ + b^^V^T^ + b^JHV + b^^THV^ + b^JH^V 



+ b^^T^HV + b^^TH^V^ + b^J^HV^+ ^25^^^^^' + b^J^H^V^ 



However, to facilitate the derivation of the response equation, only the 

 first nine of the 26 terms were considered in the regi'ession equation, since these 

 terms included the main effects as well as the two-factor interacting effects. 



The regression equation which was derived took the following form: 



P = 6q + 6^T + b^H + 63V + bj^ + b^H^ + 5g\/2 ^ i^^T^ ^ i^^^^y ^ ^^y^ 

 The coefficients of the above regression equation have the following 



values: 



5n = 1.1117 



b, = -0.000045701 b^ = -0.00039512 



^1 = 0.0013594 ^5 = 0.000015696 69 = -0.00047497 



^2 = -0.0014441 6g = -0.0025789 



&3 = 0.063866 b^ = -0.000020144 



