PROBLEM 



Verify the occurrence of synergistic (interacting) effects in combined- 

 environment testing and show their contribution to the deterioration in perform- 

 ance of a shipboard electronic module. 



RESULT 



The test revealed that synergistic effects occurred and contributed to the 

 degradation in performance of an intermediate-frequency, amplitude-modulation 

 (if/am) amplifier module. This specific module is used in the signal converter 

 which is part of the AN/SRC-16. 



RECOMMENDATIONS 



1. Conduct a conventional enviroiunental test according to MIL-E-16400E 

 (NAVY)* and a combined-environment test on a shipboard electronic module and 

 compare the results. 



2. Continue assessment of the effect of combined environments on shipboard 

 electronic equipment with various types of shipboard electronic modules. 



3. Continue work to develop a "standard" combined-environment test 

 procedure. 



^^ ADMINISTRATIVE INFORMATION 



This report covers work from October 1907 to January 1968 and was ap- 

 proved for publication 18 March 1968. The work was performed under the SEEDS 

 program, SF 013 14 04, Task 5788 (NELC R114), by the Equipments Effective- 

 ness Division. 



Thanks are extended to C. J. Van Vliet, of the Mathematical Division, 

 for preparing the computer programs in conjunction with the derivation of the 

 regression equations. 



*Department of the Navy Military Specification MIL-E-16400E (NAVY), Elec- 

 tronic Equipment, Naval Ship and Shore, General Specification, 15 June 1962. 



REVERSE SIDE BLANK 



