MIL-STD-1553 Data Bus Space-Grade Screening

	Level 1	Level 2	Level 3
Physical Characteristics
Dimensions	√	√	√
Weight	√	√	√
Enclosure – RFI/EMI Sealing	√	√	√
Cable	√	√	√
Mounting Attitude	√	√	√
Material Characteristics
Vacuum Stability			√
Outgassing / Toxicity			√
Odor			√
Flammability			√
Fungus			√
Ozone Exposure			√
Fluids Resistance			√
Electrical Design Characteristics
Transformer Test
Transformer Turns Ratio	√	√	√
Polarity	√	√	√
Transformer Open Circuit Impedance	√	√	√
Frequency Range	√	√	√
Waveform Integrity	√	√	√
Droop	√	√	√
Overshoot and Ringing	√	√	√
Common Mode Rejection	√	√	√
Induced Voltage	√	√	√
Dielectric Withstanding Voltage (DWV)	√	√	√
Insulation Resistance (IR)	√	√	√
DC Resistance of Bus Side WDG	√	√	√
DC Resistance of Stub Side WDG	√	√	√
Pulse Time for Waveform Test			√
Pulse Duration			√
Pre-Cap Inspection (per Mil-Std-981)			√
Coupler Test
Electrical Characteristics	√	√	√
Shield Continuity	√	√	√
Bus Return Loss	√	√	√
Stub Return Loss	√	√	√
Phase	√	√	√
Continuity	√	√	√
Insulation Resistance	√	√	√
Dielectric Withstanding Voltage (DWV)	√	√	√
Bus DCR		√	√
Stub DCR		√	√
Characteristic Impedance			√
Thermal Shock			√
Vibration			√
Environmental Tests
Workmanship			√
X-Ray Fluorescence		√	√
Thermal Rating			√
Thermal Cycling (Vacuum)			√
Thermal (Temperature) Shock			√
Random Vibration			√
Mechanical Shock			√
Salt Atmosphere (Corrosion)			√
Non-Destructive Tests
Radiographic Inspection (X-Ray)		√	√

Space: MIL-STD-1553 Data Bus Assembly-level Screening