4.0 Test Program

Table 1 shows environmental conditions defined for XTE and TRMM. Table 2 shows the tests used to evaluate the cable assembly and the test equipment employed. Figure 3 shows the testing flow.

Table 1. XTE and TRMM Environmental Conditions:

    Temperature		-operating		0C to +5C

			-storage		-20C to +40C

    Vibration (Random)	- XTE			7.87 Grms

			- TRMM			14.8 Grms

Table 2. Test Methods and Conditions

Step  Test                       Conditions                       Test Equipment              

  1   Physical         Verify dimensions to three                                             
      Dimensions       significant digits.                                                    

  2   Thermal          85°C for 24 hrs (minimum)      Tenney Benchmaster oven with Watlow     
      Conditioning     followed by    -55°C for 24    Series 942 controller                   
                       hrs (minimum)                                                          

  3   Visual           Inspect the cable for          Janavert 30-G0685 incident light        
      Inspection       evidence of degradation.       microscope, Nikon Epiphot inverted      
                       Inspect fiber end faces at     microscope, Norland Fiber               
                       200X minimum.                  Interferometer,                         

  4   Insertion Loss   See Appendix A                 Tektronix 6711 Optical to Electrical    
                                                      Converter, Hewlett Packard 54501A       
                                                      digital oscilloscope, Noyes OPM1        
                                                      Optical Power Meter, DC Power Supply,   
                                                      Honeywell HFE4010 transmitter, Hewlett  
                                                      Packard 8158B Optical Attenuator        

  5   Temperature      Test method EIA/TIA-455-3A.    Tenney Benchmaster oven with Watlow     
      Cycling          Using                          Series 942 controller with the          
                       50 C for max temperature and   insertion loss set-up.                  
                       -20C for minimum temperature,                                          
                       8 cycles.                                                              

  6   Visual           See step 3                     See step 3                              
      Inspection                                                                              

  7   Insertion Loss   See Appendix A                 See step 4                              

  8   Random           Test Method MIL-STD-1344,      B335 Shaker System Lateral Table with   
      Vibration 1      Condition V, 18.7 Grms, 6      the Insertion Loss set-up               
                       minutes in each of three                                               
                       mutually perpendicular                                                 
                       directions.  Optical                                                   
                       throughput shall be measured                                           
                       during exposure using a                                                
                       0.008mW input signal.  A                                               
                       mechanical integrity test                                              
                       will also be performed on the                                          
                       SMA to active device                                                   
                       interface.  Use bracket A in                                           
                       Figure 9.                                                              

  9   Visual           See Step 3                     See step 3                              
      Inspection                                                                              

 10   Insertion Loss   See Appendix A                 See step 4                              

 11   Random           Repeat step 8 using bracket B  see random vibration 1 above            
      Vibration 2      in                                                                     
                       Figure 9.                                                              

 12   Visual           See Step 3                     See step 3                              
      Inspection                                                                              

 13   Insertion Loss   See Appendix A                 See step 4                              

Figure 3. Testing Flow

Physical Dimensions

Thermal Conditioning

Visual Inspection

Insertion Loss

Temperature Cycling

Visual Inspection

Insertion Loss

Random Vibration (Bracket 1)

Visual Inspection

Insertion Loss

Random Vibration (Bracket 2)

Visual Inspection

Insertion Loss